-106°22'30"
Qae
Ton
Qae
Tcc
T1Y
Qae
1
Qca
Qay
Tg
Top
3
Qay
Tcrg
Qay
Qay
A
Qay
Top Qay
Qae
Top
Top
Top
Qe
2
Top
Qa
Qay
Qae
Tcrg
Tcs(?)
5
Ton
Ton(?)
5
Tcrg
Qae
2
Tcrg
Qe
Qay
Qay
QTc(?)
Ton(?)
10
Tcrg
Ton
Qay
Qe
1
Qae
af
Qae
Qay
Qao
Tcrg
4
Tcrg
Tcrg
Tcrg
Qam
Qam
Tcrg
Qay
4
Rru8
Qam
Tcrg
Qae
Tcc
Tca
Rru14
Tcrg
Qay
Qa
Qrpf
Qae
Rru21
Tcrg
QTc
af
Qrpo
Qa
Qay
Tcs
Qe
LMS
Qe
76
14
Tcrg
Qay
QTc
Qam
Qae
Tcc
11
Tcrg
Tcrg
Qao
Ton
5850
SANDOVAL COUNTY
BERNALILLO COUNTY
Qao
0
Qao(?)
5850
BR
Tca
Qay
Qrpy
ln2
Qay
Qrpc
Qrl
2
Qao
Qrpf
Qa
Qay
Qay
Qao
Qao
HRP
Tcrg
af
Qay
Tcau
Qa
Qao
Tcrg
Qay
Qrpm
Qam
Tca
Qay
585 0
Qrl
Qca
af
Qay
Za1
Tcrg
Qb4
Qrl
Vc2
Qrl
Qb1
Tcau
Za2
50
Qrl
58
af
Qb5
Qca
Los Ranchos de
Albuquerque
Qca
Qa
5850
DY1
af
Tcrg
Tcrg
Qpl
§
¦
¨
Qay
40
af
Tcrg
Qe
Qe
Qed
Qca
Qe
Qay
Qe
Tcrg
Qpl
Qe
Qpl
Qa
af
Bu2
Sj3
Qrpy
Le2
Qra
GEOMORPHIC SURFACES
Depositional
Kvp
Mesaverde Group, Point Lookout Sandstone (Kvp, Upper Cretaceous) — grayish-tan to light-yellow, very fine- to fine-grained, massive, quartzose sandstone
with limonitic sandstone lenses and interbedded thin gray shale; 73 m thick.
Kvm
Mesaverde Group, Menefee Formation (Kvm, Upper Cretaceous) — white to light-yellow fine- to medium-grained, well sorted, lenticular, cross-stratified, quartzose
sandstone with interbeds of dark-gray to black siltstone and carbonaceous shale and coal; 205-365 m thick.
Kms
Mancos Shale, Semilla Sandstone (Kms, Upper Cretaceous) — dark-gray shale and tan to yellow, planar laminated siltstone overlain by well sorted, well rounded,
fine-grained and horizontally bedded sandstone; in lower part of Mancos Shale; 20 m thick.
Kmh
Mancos Shale, Hosta-Dalton Sandstone (Kmh, Upper Cretaceous) — yellowish-gray to yellowish-tan, very fine- to medium-grained, weakly cemented, fossiliferous
sandstone with olive-brown sandstone lenses; 64-112 m thick.
Km
Mancos Shale, undivided (Km, Upper Cretaceous) — medium- to dark-gray to olive-gray, shale, silty shale and calcareous shale; divided into lower and upper shale
by Hosta-Dalton Sandstone (Kmh); upper shale includes thin, regionally recognizable marker beds such as the Greenhorn Limestone and Juana Lopez Member; upper
shale is correlative to the Graneros-Niobrara interval of the southern High Plains and San Juan Basin; total thickness ranges between 330-675 m.
Kd
Dakota Fm (Kd, Upper Cretaceous) — light- to yellowish-gray and brown, silica-cemented quartzose sandstone; overlain by and interbedded with dark-gray to olivegray shale of the Mancos Shale; 8-40 m thick.
Ju
Jurassic sedimentary rocks, undivided (Ju, Middle-Upper Jurassic) — light-brown to pale-orange cross-stratified sandstone, dark-gray, thinly laminated limestone,
gray gypsum, brown silty sandstone, pale-orage to grayish-red, variegated feldspathic cross-stratified sandstone, conglomerate and mudstone; includes deposits of the
San Rafael Group (Entrada, Todilto, and Summerville Formations) and Morrison Formation; 310 m thick.
@u
Triassic sedimentary rocks, undivided (@u, Middle-Upper Triassic) — red mudstone, trough cross-bedded sandstone, and conglomerate with petrified wood
overlain by pale-orange, mica-bearing fluvial sandstone; includes deposits of the Chinle Group and Moenkopi Formation: 400-500 m thick.
Psg
San Andres and Glorieta Formations, undivided (Psg, Upper Permian) — light-gray to tan, locally karstic limestone and grayish-white cross-stratified quartzose
sandstone; 15-77 m thick.
Pay
Abo and Yeso Formations, undivided (Pay, Lower Permian) — pale-red and grayish-red mudstone and grayish-white to light-orange lenticular, cross-stratified
arkosic sandstone, siltstone, claystone and beds of gypsum and gypsiferous sandstone; 500 m thick.
&m
Madera Group, undivided (&m, Pennsylvanian) — gray, ledge-forming, cherty limestone with interbedded argillaceous limestone of the Gray Mesa Formation;
overlain by fossiliferous limestone with interbedded sandstone and mudstone of the Atrasado Formation; uppermost part of unit includes mixed marine carbonate and
nonmarine clastic sediments; 385-402 m thick.
&s
Sandia Formation and Arroyo Peñasco Group, undivided (&s, Pennsylvanian-Mississippian) — quartz-pebble conglomerate, sandstone, and dolostone (Arroyo
Peñasco Group) and interbedded brown claystone and gray limestone (Sandia Formation); 37-81 m thick.
Qb5
Qb4
Qb3
Qb2
Qb1
Ç
ÇÇ
Ç
Ç Ç Ç Ç ÇÇ
Ç
Ç
Ç
Ç ÇÇ
Ç
Ç
Ç
Ç
ÇÇÇ Ç
Ç
Ç Ç
Ç
Ç Ç Ç Ç Ç ÇÇÇ
ÇÇ
Ç
Ç
ÇÇ Ç
Ç
Ç
Ç
Ç Ç
Ç
Ç
Ç
ÇÇ
Ç Ç
ÇÇ Ç Ç
Ç
Ç
Ç
Ç
Ç
Ç
ÇÇ
Ç
Ç Ç
Ç
Ç ÇÇ Ç Ç
ÇÇÇ
Ç
Ç
Ç
Ç
Ç Ç
Ç Ç
Ç Ç
ÇÇ
Ç ÇÇ Ç
Ç
Ç Ç
ÇÇ
Ç
Ç
Ç
Ç
Ç
ÇÇ
Ç
Ç
ÇÇ Ç Ç
Ç
Ç
Ç
Ç
Ç
ÇÇ
Ç
ÇÇ Ç
ÇÇ
Ç
ÇÇ
Ç
Ç
Ç Ç Ç Ç Ç Ç ÇÇÇ Ç
Ç
ÇÇ Ç Ç
Ç Ç
Ç
Ç
ÇÇ
Ç
Ç
ÇÇ
Ç Ç Ç Ç Ç Ç ÇÇ ÇÇ ÇÇ Ç Ç
ÇÇ
Ç ÇÇ
ÇÇ
Ç Ç
Ç Ç Ç ÇÇÇ Ç Ç
Ç
Ç
Ç
Ç ÇÇ ÇÇ
Ç Ç
Ç
Ç
Ç
Ç
Ç
Ç
Ç ÇÇ
ÇÇ
Ç
*
7
Pay
Tvc
Tvcb
5
Buried igneous rocks inferred from aeromagnetic anomalies (Miocene-Pliocene) — probable buried intrusive or volcanic rocks recognized by areas of higher
relative value (>180 nT) on high-resolution aeromagnetic anomaly maps (Kucks et al., 2001) and locally encountered in drillholes; buried features may extend beyond
lateral limit of unit.
8
Qay
Bu1
Ri3
15
af
Sj5
Qaot1
af
Qaot2
§
¦
¨
3
5
Qrpo
oyo
Arr
ras
Tije
1
Qrpf
Qrpo
Qa
KAFB-0215
QTsp
Qe
MPC
Qae
Qrpm
Kafb9
Qay
66
Qe
Qrpf
Ys
Qpm1
Qrd
3 45
40 -106°45'
-106°37'30"
3
Xg
Qay
50
60
Llano de Albuquerque
Tcau
Tls
17
Qca
unconformity
Rincones paleosurface
Qpm
&s
Xv
Xg
Xg
Tzm
&s
10
35°
3
3
Tzp
-106°22'30"
70
65
North
Magne
tic
True North
Preliminary Geologic Map of the Albuquerque—Rio Rancho Metropolitan
Area and Vicinity, Bernalillo and Sandoval Counties, New Mexico
unconformity
Tis*
unconformity
Td
unconformity
Kvm
Kvp
Kmd
Kms
Km
Kd
unconformity
Explanation of Symbols
Loma Machete
A DIVISION OF NEW MEXICO INSTITUTE OF MINING AND TECHNOLOGY
Open-File Report 496
Placitas
Bernalillo
Zia Pueblo
San Felipe
Pueblo
Santa Ana
Pueblo
LA CEJA
e
os
5
PLATE 1, version 2.0
10
Placitas
Connell (1998)
1
Connell et al. (1995)
0
1
2
3
4
Rio Rancho
Sandia Crest
Miles
Albuquerque
East
Kilometers
Tijeras
Connell et al.
(1998b)
Connell et al.
(in preparation)
1:50,000
Karlstrom et al.
(1994)
Albuquerque
NMBGMR
5
10
USGS
15
20
km
-106° 22' 30"
Kelson et al. (1999)
75
as A
Tijer
o
rroy
"
5
10
20
km
Approximate extent of inset ancestral Rio Grande terrace deposits
(Fluvial terrace deposits of the Rio Grande), hachures towards valley.
A
Geologic cross section (Plate 2).
A'
WMF
Approximate lateral (buried) limit of axial-fluvial member (ancestral
Rio Grande deposits) of the Sierra Ladrones Fm (QTsa).
G
Th5
Water-supply well.
Horizontal bedding.
H
SCS
Monitoring well.
Strike and dip of inclined and overturned bedding.
I
MPC
Geotechnical boring.
D
S1
Strike and dip of inclined and vertical foliation.
Strike and dip of inclined joint.
Aeromagnetically defined fault, interpreted from data of Kucks et al.
(2001); symbols U and D denote inferred upthrown and downthrown
sides, respectively. Linear anomalies mark probale location of fault
(Grauch et al., 2001).
Normal fault, showing dip; ball and bar on dowthrown side; dashed
? where approximately located; dotted where concealed; queried
where inferred.
Reverse fault; bar on upthrown side; dashed where approximately
? located; dotted where concealed; queried where inferred.
where inferred.
Strike-slip fault, showing relative horizontal separation; dotted where
? concealed; queried where inferred.
Oil well.
@u
unconformity
Pay
&m
&s
" x"
Azimuth of paleocurrent vector (imbrications & cross stratification);
includes sand dune orientation data of Lambert (1974).
C
?
Anticline, showing direction of plunge; dashed where approximately
located; dotted where concealed; queried where inferred.
C C
Yss
?
Syncline, showing direction of plunge; dashed where approximately
located; dotted where concealed; queried where inferred.
?
Overturned anticline, showing direction of plunge; dashed where
approximately located; dotted where concealed; queried where inferred.
?
Overturned syncline, showing direction of plunge; dashed where
approximately located; dotted where concealed; queried where inferred.
?
Monocline, showing direction of plunge; dashed where approximately
located; dotted where concealed; queried where inferred.
stream wind
F
M
I
P
T
unconformity
Age-control sample site (Table1, Plate 2).
C
C
C
*pedogenic carbonate morphologic stage (Machette, 1985).
-106° 22' 30"
unconformity
Psg
B
Thrust fault (ductile deformation); barb on upthrown side; dashed
$
Active Rio Grande channel.
Petrocalcic soils of Llano deAlbuquerque surface (black dots;
stage* III+ to locally weak stage IV carbonate morphology).
? where approximately located; dotted where concealed; queried
Kirtland Air
Force Base
15
U
D
35° 00'
0
d U
D
A
NIT
NZA .
A
M MTS
35° 00'
0
Los Ranchos
de Albuquerque
DE
NATIONAL GEODETIC VERTICAL DATUM OF 1929
Shroba et al.
(2003)
4
D
TAIN
S
3
VAL L
EY
Read et al. (1995)
2
SANDOVAL CO.
BERNALILLO CO.
RA N
Albuquerque
West
Connell (1997)
1
DE
La Mesita
Negra SE
Connell
(this study)
0
Corrales
RIO G
1
Thompson et al.
(in preparation)
U
ALBUQUERQUE
VOLCANOES
Alameda
Los Griegos
ALBUQUERQUE
The Volcanoes
Æ
75
Sandia
Pueblo
MOUN
Personius et al.
(2000)
SAN D
IA
Cather et al.
(1997)
98
¦Â
Bernalillo
LLANO
Geology compiled by Sean D. Connell based on mapping conducted during 1994-2005. Map editing, digital database construction, and
digital cartography by Mark M. Mansell and Sean D. Connell using ARC-GIS (ARC/INFO) versions 8.2 and 9.1. Initial release March 2006
(version 1.0). Version 2.0 release November 2006. This map and digital database data are available in ARC/INFO and portable document format
at: http://geoinfo.nmt.edu/publications/openfile/496. Plots may be purchased on request at New Mexico Bureau of Geology and Mineral
Resources, 801 Leroy Place, Socorro, New Mexico USA, 87801-4796; phone: (505) 835-5420.
Personius (2002)
Petrocalcic soils of Sunport and Las Huertas surfaces (gray dots;
stage* III+ carbonate morphology).
ez
Base maps from U.S. Geological Survey 7.5-minute topographic series, Polyconic and Universal Transverse Mercator (UTM) projections,
North American Datum of 1927 and 1983. Reprojected to Universal Transverse Mercator, Zone 13, North American Datum of 1983. Grid
ticks at 5,000 m in UTM, zone 13, NAD 1983, shown in blue. Property boundaries on the Major Physiographic and Cultural Features Map
inset are generalized from data from the New Mexico Earth Data Analysis Center (http://edac.unm.edu/).
Arroyo De Las
Calabacillas
New Mexico Bureau of Geology and Mineral Resources
Cather &
Connell (1998)
SANTA
ANA MESA
m
Je
This map has not been reviewed according to New Mexico Bureau of Geology and Mineral Resources editorial standards and revision of the
map is likely. The contents of this map and report should not be considered final and complete until reviewed and published by the New
Mexico Bureau of Geology and Mineral Resources. The views and conclusions contained in this document are those of the compiler and
should not be interpreted as necessarily representing official policies, either expressed or implied, of the State of New Mexico or the
U.S. Government.
Koning et al. (1998)
Koning &
Personius (2002)
San Felipe
Pueblo
Santa Ana
Pueblo
Bernalillo NW
Geomorphic surface and name (Correlation of map and geologic
cross section units, Plate 1).
Sunport
Tephra bed: Cerro Conejo (Tc), Arroyo Ojito (Tob), Cochiti (Tpc),
and Sierra Ladrones (QTsa) Formations.
Petrocalcic soils of Rincones surface (white dots; stage*III+
(on Ton) and V (on Top) carbonate morphology).
35° 30'
Cerro Conejo
Road.
Geologic contact, including approximately located boundaries;
queried where inferred.
?
Major physiographic and
cultural features
-106° 52' 30"
35° 30'
This geologic map graphically displays information on the distribution, character, orientation, and stratigraphic relationships of rock and
surficial units, and structural features. Data were compiled at a scale of 1:50,000 from geologic field mapping conducted at scales of
1:12,000, 1:24,000, and 1:50,000; therefore, significant variations in map detail may be expected. Additional data were derived during
interpretation of available aerial photography, satellite imagery, examination and interpretation of available drill-hole data, and compilation
of data from numerous published and unpublished works. Locations of geologic unit contacts are not surveyed and the accuracy of contact
locations depends on the scale of mapping and field conditions. Any enlargement of this map may cause significant misunderstanding in the
detail of mapping and may result in erroneous interpretations. Site-specific conditions should be verified by detailed surface mapping or
subsurface exploration. Geologic cross sections (Plate 2) can aid in understanding the general geologic framework of the map area.
Construction of geologic cross sections are based on interpretations of geologic mapping, available geophysical data (e.g., aeromagnetic,
gravity, gamma ray), and available drill-hole data (published and unpublished well reports, examination of lithologic cuttings, and interpretation of borehole geophysical log data). Geologic cross sections and maps should not be the sole source of information for use in locating
wells or other man-made structures.
The information presented on this map resulted from the collective efforts of numerous scientists and public and private institutions, including
(but not limited to) the Geologic and Water Resources divisions of the U.S. Geological Survey, University of New Mexico, and New Mexico
Institute of Mining and Technology. I am grateful to the following organizations and individuals for facilitating property access and subsurface
information: Albuquerque Academy, Bernalillo County, Black Ranch, City of Albuquerque, Intel Corp., King Ranch, New Mexico Utilities,
Rio Rancho Utilities, Westland Corporation, and the Pueblos of Sandia, San Felipe, Santa Ana, and Zia. Assistance was provided by Hawley
Geomatters, John Shomaker and Associates, Glorieta Geosciences, Geohydrology Associates, GRAM Inc., Metric Corporation, and Westwater
Associates. Reviews by Bruce Allen, Steve Cather, Richard Chamberlin, Spencer Lucas, Greg Mack, and David Sawyer are appreciated.
Index to geologic mapping
(7.5-minute quadrangles)
Major highway.
40
o
Ri
Mapping of the Alameda, Albuquerque East, Albuquerque West, Arroyo de las Calabacillas, Bernalillo, Placitas, Sandia Crest, San Felipe
Pueblo, and Tijeras quadrangles was financed by matching-funds grants from the STATEMAP component of the National Cooperative
Geologic Mapping Program coordinated by the U.S. Geological Survey and the New Mexico Bureau of Geology and Mineral Resources
(Dr. P.A. Scholle, Director and State Geologist). Geologic mapping of the Cerro Conejo quadrangle was funded by the EDMAP
component of the National Cooperative Geologic Mapping Program (Dr. F.J. Pazzaglia, Principal Investigator). Geologic Mapping of
the Bernalillo NW, La Mesita Negra SE, Loma Machette, Santa Ana Pueblo, and The Volcanoes quadrangles were conducted by the U.S.
Geological Survey. Additional mapping and supplemental stratigraphic work, including reconnaissance geologic mapping of Los Griegos
quadrangle and the western half of the map area, was funded by the New Mexico Bureau of Geology and Mineral Resources.
-106° 52' 30"
¨
§
¦
Sean D. Connell
2006
Tsp
Tzr
Xq
Ju
New Mexico
Tvc
Tvc
unconformity
unconformity(?)
Tg
2005 MAGNETIC NORTH
DECLINATION AT CENTER
OF SHEET
Tvcb
Tbv
Tpc
Tcc
75 000m.N
Topographic (elevation) Contour Interval = 150 feet
9º 51'
Tb
Ton
13
&m
22
?
Top
38
Xg
Xq
QTta
Tc
Tob
af
Xg
Xq
Lomos
Altos
QTt
Tca Tcs
Xs
45
QTsa QTsp QTct
Tcrg
Xv
10
Xv
Xq
unconformity
83
20
Qay
Xq
Qpm
Xq
-106°30'
3
3 55
24
5
Xq Xs
Xq
40
Xg Qpm
35°
3
QTp
Xs
60
&m
Sunport &
Las Huertas
unconformity
3
79
Qpm
73
Xq
5
SC-2
15
Qpm
Xq
Qrl
7
10
Xs
&m
Xv
&m
Xs
Xv
Qpm
Xg
Xv
Qca
SA-6
0
10
47
Qra
3
Qay
Qpm1
PL1
Qpm2
SA-2
SB-2
Qrpm
Qam
QTsa
1
Qa
Qpm
Qpm2
Qrpy
Xq
Qpm
66
Qay
Qao1
Qaot1
unconformity
unconformity
13
44
Xq
Qay
QTsp
Qe
Qao
QTc
Qao2
Qaot2
6
&s
Qay
20
QTsp
MPS
Qrd
Qpm2
unconformity
38
80
17
64
Qay
af
af
59
Qbv
Qre
20
60
Qay
Ç
Ç ÇÇ ÇÇÇ Ç Ç
Ç
Ç Ç ÇÇ
Ç ÇÇ
Ç
Ç
Ç Ç
Ç
Ç Ç
Ç
ÇÇ
Ç
Ç Ç Ç ÇÇÇÇÇ
Ç
Ç Ç ÇÇ Ç
Ç
Ç
Ç
Ç
Ç
Ç
Ç
ÇÇ
Ç Ç ÇÇ
ÇÇ
Ç
Ç
ÇÇ
Ç Ç Ç Ç
ÇÇ Ç
ÇÇ Ç
Ç
Ç
ÇÇ
Ç
Ç
Ç Ç ÇÇÇ
Ç
Ç
volcanoes
Qao4
Qao3
35
17
Xv
Qay
QTsa
2
af
af
6
Qrm
Qb5
Qb3
Qb1
Qamt1 unconformity
unconformity
C'
16
Albuquerque
Qb4
Qb2
81
&s
66 0 0
Tcrg
SB-1
&m
80
9
6
Qay
25
Qca
&m
14
Yss
Qrd
88
5
88
Xg
Segundo Alto
Qam1
88
14
Xs
Xg
unconformity
Qpm1
10
25
Qpm1
Qam
Qay
4
Xs
Qay
Qpm
af
&m
22
Qru
Pay
65
Xq
Qamt2
14
28
Xq
Qay
Qam2
Qamt2
18
Ys
Qae
PSMW19
Tcrg
Qay
Qra
unconformity
Qpm2
11
18
Kafb11
Qe
Tcrg
Qamt1
Qaot2
KAFB-0502
QTsp
Qrpf
Qrpo
15
17
Qca
Xs
Yss
unconformity
Primero Alto
8
Qam1
Qamt1
Qae
af
Qam2
af
Qrpoc
Qra Qrd
Xg
Qls
unconformity
Qao
Xq
9
Eu1
Qe
Pay
Pay
15
22
Qaot2
85
4
Qay
QTsp
38
Qam2
Qam
Yss
Qay
Qay
26
Qao
Xs
Kafb16
YM5
Qa
10
33
Qrpyc
Qrpm
Qrpmc
Qrpo
Qrpoc
Qamt3
QTp
50
Qam
25
Qrpf
Qrpc
af
Qpl
63
30
18
Qao
Xg
SC-1
Qca
Metasedimentary rocks, undivided (Xq, Paleoproterozoic) — gray to white, thick-bedded to massive, cross-stratified quartzite with pelitic partings and interbeds;
includes Isleta metasediments, and Cerro Pelon, Coyote, and Cibola quartzite, U-Pb age on zircon of metamorphism is 1423±2 Ma.
Qpy
Qa
Pay
Yss
12
Xq
Qed
Kvm
72
Qay
4H
Schist, undivided (Xs, Paleoproterozoic) — pelitic, locally quartz-bearing, schist and phyllite; commonly crenulated with zones of quartz-muscovite and andalusiteto sillimanite and biotite-bearing schist; includes Juan Tabo series; intruded by Sandia granite with contact aureole on Rincon Ridge; whole-rock Rb-Sr age of
metamorphism is 1640±40 Ma (Brookins and Majumdar, 1983, cited in Kirby et al., 1995).
50
65
Qay
66
Qay
Qrpm
Qrpmc
82
10
Qay
Xs
Kvm
&m Qam
76
QTsp
Metavolcanic rocks, undivided (Xv, Paleoproterozoic) — Metarhyolite, felsic metavolcanic, mafic metavolcanic, and metamorphosed dacitic tuff; intruded by older
granite (Xg); not dated in map area, but U-Pb date on zircon from the nearby Monte Largo Hills metarhyolite indicate an age of crystallization of 1700±20 Ma
(Karlstrom et al., 2004).
74
Ju
5
af
af
Qrpm
&s
Qam
Qamt3
Qamt1
Qay
Sj4
Qrpo
Qrpm
22
Xq
8
Qam
Qrpo
Le3
85 67
28
Qam
40
Xv
Qam2
Ju
QTp
20
3
47
§
¦
¨
Older granite, undivided (Xg, Paleoproterozoic) — isolated screens and xenoliths of banded biotite-rich granitic gneiss intruded by the Sandia granite; also contains
leucocratic and aplitic granite and biotite-poor granite; includes Manzanita granite and Cibola granite (gneiss) with U-Pb dates on zircon indicate age of crystallization of
1645±16 Ma and 1653±21 Ma, respectively (Karlstrom et al., 2004).
Qao
@u
14
14
Xg
73
42
50
Lm6
Ri1
Felsic dike (Mesoproterozoic) — pegmatite and aplite dikes, pods and lenses; coeval with emplacement of Sandia granite (Ys); thickness ranges from 30 cm to
over 15 m; up to 1600 m in length.
Qae
35
&m Pay
15
69
15
Sandia granite (Ys, Mesoproterozoic) — pink megacrystic biotite monzogranite and granodiorite; includes zones of sheared megacrystic biotite monzogranite and
granodiorite of the Seven Springs shear zone (Yss) just north of trace of Tijeras fault zone; U-Pb dates on zircon indicate age of crystallization between 1455±12 Ma
and 1446±26 Ma.
Qrpy
Qca
32
Ar/39Ar date of 31.1±0.5 Ma (SA-29, Table 1) for
@u
10
Qca
12
&s
C
Yss
C
44
24
25
C
40
Correlation of Map and Geologic Cross Section Units
Ju
Qamt2
C
34
24
49
Tls
Ys
Psg
&m
11
Tuff of Canjilon Hill (Tvc, upper Pliocene) — oval-shaped tuff-breccia diatreme that intrudes Santa Ana Mesa Member (Tcs, Ceja Formation) south of Santa Ana
Mesa; includes basaltic lavas, dikes, and brecciated lava flows (Tvcb); whole-rock 40Ar/39Ar date on basaltic dike of 2.54±0.43 Ma (SA-9, Table 1).
86
21
9
Vents of the Albuquerque volcanoes (Qbv, middle Pleistocene) — larger cinder and spatter cones of Albuquerque volcanoes volcanic field; smaller vents denoted
by asterisk (*).
Basaltic lavas of Santa Ana Mesa (San Felipe volcanic field) (Tb, upper Pliocene) — tholeiitic flood basalts and vents (Tbv) forming Santa Ana Mesa; whole-rock
40
Ar/39Ar dates of 1.78±0.21 and 2.60±0.11 Ma (SA-7 and SA-8, Table 1); ; 6-30 m thick.
Tbv
QTp
22
4
Basaltic lavas of the Albuquerque volcanoes (Qb, middle Pleistocene) — vesicular olivine tholeiite lava flows locally divided into five flows (Qb1-Qb5) based on
surface morphology and stratigraphic position (modified from Kelley and Kudo, 1978; and Thompson et al., in preparation); whole-rock 238U/230Th date of 0.156±0.02 Ma
(Peate et al., 1996); generally less than 15 m thick.
Asterisk (*) denotes units shown on geologic cross section only (Plate 2)
QTp
Qay
Lm5
Kafb15
Tcrg
Qa
Qra
35
Diamond Tail Formation (Td, Paleocene(?)-Eocene) — dark-red and gray variegated sandstone and mudstone with scattered pebbly sandstone; defined by Lucas
et al. (1997); unconformably overlain by Galisteo Formation; contains Wasatchian (late Paleocene-early Eocene) fossils; exposed thickness is 133 m; regional thickness
ranges from 100 to 442 m.
35°7'30"
Ys
Qrpo
af
Qrd
30
Td
29
Qam
Qam
Qamt1
Qay
-106°52'30"
Galisteo Formation (Tg, Eocene) — variegated red, green, purple and gray mudstone with intercalated thin beds of yellowish-brown, cross-bedded, arkosic sandstone
and conglomerate; defined by Stearns (1943); unconformably overlies Menefee Formation; upper contact gradational with Espinaso Formation exposed northeast of
map area; contains Duchesnean (Eocene) fossils; exposed thickness is 133 m; regional thickness ranges from 22 to 979 m.
Tb
35
QTp
Sj2
Qa
Qpl
3
Erosional
Pay
Lm1
Mi1
Qay
3
Tg
Qbv
Qao
35
58
Qa
QTsa
Qre
Tcrg
Tcrg
Qa
Ya2
Le1
45
Bcdc
Psg
6600
314
Qrpf
af
49
Lm2
QTsp
Cc1
NO1
Eastern basin-margin piedmont deposits, undivided (Tsp, upper Oligocene(?)-Miocene) — pale-brown to reddish-brown conglomerate and sandstone with minor
mudstone; contains abundant clasts of limestone and sandstone in northern Sandia Mountains; dark-gray hornfels and hypabyssal intrusive clasts from the Ortiz Mountains
increase in abundance to the north; contact with overlying Sierra Ladrones Formation piedmont member deposits (QTsp) is indistinct and approximate; 150-800 m thick.
Qao
31
Qay
Bu5
RB5
QTc
Tzm
Zia Formation (Tz, lower-middle Miocene) — cross-stratified sandstone and mudstone; unconformably overlies Galisteo and Menefee Formations (Tg, Kvm) and
unit of Isleta well #2 (Tis, in subsurface, see Plate 2); defined by Galusha (1966) and Gawne (1981) and contains late Arikareean through Hemmingfordian mammalian
fossils (SB-5, Table 1; Galusha, 1966) and divided into three members:
Cañada Pilares Member (Tzr, middle Miocene) — red mudstone and sandstone; discontinuously exposed; defined by Gawne (1981); 8-75 m thick.
Chamisa Mesa Member (Tzm, middle Miocene) — pale-brown to light reddish-brown cross-stratified fluvial and eolian sandstone and mudstone; 30-200 m thick.
Piedra Parada Member (Tzp, lower-middle Miocene) — whitish-gray to pinkish-gray cross-stratified sandstone, eolian in origin; 70-122 m thick.
@u
Qao
20
Qca
Ri4
500
Qe
Cerro Conejo Formation (Tcc, middle-upper Miocene) — pink to very pale-brown tabular and cross-stratified sandstone with thin to medium bedded mudstone;
contains sandstone concretions and volcanic fallout ashes (11.3-10.8, SA-25 through SA28, Table 1), and late Barstovian mammalian fossils (SB-3, SB-4, Table 1);
base is probably disconformable with the Zia Formation; top may be disconformable with Arroyo Ojito Formation to west, but interfingers with Navajo Draw Member
to east; originally defined as Cerro Conejo Member (Zia Formation) by Connell et al. (1999), but elevated to formation rank based on mappability; 245-316 m thick.
Tzr
&s
af
Ri2
Qam1
QTsa(?)
Qrpo
Qay
24
87
31
Pay
20
Qay
Ri5
Qre
Qrpo
Qpl
Qa
Qay
Qamt1
Ya1
Qrpf
25
90
Qamt1
Qamt2
Qrpm
13
38
Qam
Bu4
af
Qa
Qpl
western
Qa
13
Qca
Lv3
Qamt1
Qrpf
Qrpo
28
Pay
34
Ya3
1
JMC
Qay
Tcrg
Qao
UNM3
At1
Qrpm
Qa
Ys
Lm3
Bu3
Qrpo
Qra
QTt
Qca
Ch6
Qay
Qrpf
Qa
Qe
Tca
HD1
Qam
Lm4
Lv6
Qca
Do2
Qe
80
Psg
32
Qam1
Qaot1
Qamt1
Qre
edge of R
io Gran
de terrace
s
af
HD2
Qca QTp
QTsa
Albuquerque
Qrpm
af
af
40
af
Arroyo Ojito Formation (1999) (To, Ton, Tob, Top, upper Miocene) — gravel-bearing fluvial deposits derived from north and northwest of the Albuquerque basin;
defined by Connell et al. (1999) and modified by Connell (in preparation); 437-456 m thick at type section in Arroyo Ojito; divided into three conformable members:
Picuda Peak Member (Top) — pinkish-gray to reddish-yellow cobbly sandstone and conglomerate; contains abundant red granite clasts; locally capped by
petrocalcic soil with stage III+ and V pedogenic carbonate morphology (Rincones paleosurface); 10-50 m thick;
Loma Barbon Member (Tob) — pink to reddish-yellow sandstone, mudstone, and pebble to cobble conglomerate; contains scattered sandstone boulders
and abundant granite clasts; contains fallout of Peralta Tuff (single-crystal 40Ar/39Ar dates on sanidine range from 6.85-7.14 Ma, SA-20 through SA-23, Table 1); 200 m thick;
Navajo Draw Member (Ton) — yellowish-brown to pale-brown pebbly sandstone and yellow to reddish-yellow mudstone; contains abundant rounded chert and
intermediate volcanic tuff clasts; contains Oligocene tuff cobbles (Connell et al., 1999); 230 m thick.
Mafic dike (Paleogene) — dark-gray, steeply dipping dike of mafic to intermediate composition; whole-rock
dike on Placitas quadrangle; up to 8 m thick.
Pay
Qca
85
Qam
Qam
Lv7
Qamt1
Qre
QTsa
Qrd
Do1
Tcau
CAT
MAT
QTsa
QTsa(?)
Qe
Tob
QTt
af
Wm1
Qay
Qa
Qaot1
Wm3
Qay
Lh
17
Qca
12
Qay
af
Wm4
Qed
810
0
Qa
40
Qrpm
Wm2
Qca
af
Top
74
Qam1
af
Tcrg
Th6
Qamt1
Qamt1
Tcrg
Tcrg
Th7
Qamt2
§
¦
¨
Du3
af
Qe
QTc
WKA
Va2
af
Qe
73
Po1
Th2
Ch5
Qa
Qay
Th5
Qa
Tcrg
Qed
Qay
Qam
Qamt2
Qay
Qa
SWB1
Pay
Qam
Qrpm
98TH
Po2
Th1
DSD
Qe
Tcau
75
Qao
585 0
Tcrg
Va4
Th8
Qa
af
Tcau
2
&s
72
Qam1
Qrpy
Qay
QTc
B'
Qca
556
af
WBP
Qa
80
Qay
Qam1
Th3
Qay
Sb1
Du6
af
Qam
Qam1
Qrm
Qrpm
Gz2
QTc
38
Po4
Po3
Qre Qamt2
Qam
Qay
345
85
Ly4
Va1
Va5
GAR
Co2
Tcrg
Tcau
Qay
Qa
Qay
af
38
20
SHO3
Th4
af
Gs3
Qa
Qpl
59 Ys
Qam1
Qay
Qrpf
Qca
Qed
Tcau
Qa
Va6
Qrpyc
Qe
Tcrg
af
Qam
Qam
Va3
448
Gz1
SA-16
8
70
Qam
Qam1
Qpl(?)
C
Wa1
Po6
MO5A
Tcrg
Tcrg
&m
39
SC1
Spu3
Qam
Qra
Qrl
Qao
Tca
3895
&m
Qca
Qa
QTsp(?)
We1
Gr1
Qb3
El Rincon
Cochiti Formation and Peralta Tuff Member of the Bearhead Rhyolite (Tpc, upper Miocene) — pale-brown, tuffaceous conglomerate and sandstone; contains
pumice-bearing intervals, Apache tears obsidian, and lapilli and ash of the Peralta Tuff; single-crystal 40Ar/39Ar date on sanidine of 7.05±0.06 Ma (SA-24, Table 1);
0-200 m thick.
Ys
&s
Ys
af
Tcrg
Qca
Qay
Tpc
Xg
&s
Qam
Gr2
Co3
Qed
&m
75
SHO-CH
§
¦
¨
MO6
Qrd
Qrl
QTc
Cochiti Formation (QTct, upper Miocene-lower Pleistocene) — light-brown sandstone and pebbly and cobbly sandstone; clasts are predominantly mafic and
intermediate volcanic rocks; recognized below and above basaltic lavas of the San Felipe volcanic field; interfingers with axial-fluvial member of the Sierra Ladonres
Formation (QTsa); usage after Smith and Kuhle (1998); base not observed, but more than 50 m thick.
Qca
Qca
&s
Qa
25
Qay
Gr5
Qb5
Tcrg
20
13
Qay
Qam
Gr3
35°7'30"
72
D'
Ceja Formation (Tc, Tcrg, Tcau, Tca, Tcs, Pliocene-lowest Pleistocene(?)) — sand, gravel, and mud derived from western and northwestern Albuquerque basin;
disconformably overlies Arroyo Ojito Formation (Ton and Top) and generally coarsens upsection; defined by Kelley (1977); contains Blancan mammalian fossils
(SB-2, Table 1); 20-700(?) m thick; divided into three members and one subunit:
Upper sand and gravel member (Tcrg), Pliocene-lower Pleistocene(?)) — pale-brown to yellowish-brown cobbly sand and gravel with scattered boulders; top is
defined by Llano de Albuquerque surface; 20-260(?) m thick; generally less than 100 m thick west of Rio Grande Vallley.
Atrisco Member (Tca, Pliocene) — pink to yellowish-brown sandstone, pebbly sandstone, and mudstone; interpreted to interfinger with Sierra Ladrones Formation
(QTsa) to east; rests on Arroyo Ojito Formation (Ton, Top) and Rincones paleosurface; locally subdivided into upper sandy subunit (Tcau); defined by Connell et al.
(1998a); 20-600(?) m thick.
Santa Ana Mesa Member (Tcs, Pliocene) — reddish-brown to yellowish-red sandstone, conglomerate, and mudstone; modified from Soister (1952) for exposures
beneath Santa Ana Mesa; interfingers with axial-fluvial memeber of Sierra Ladrones Formation (QTsa); contains thin bed of fallout ash yielding a single-crystal
40
Ar/39Ar date on hornblende of 3.81±0.29 Ma (SA-15, Table 1); 100-600(?) m thick.
QTct
&s
16
85
NEP
SCS
Qbv
UTX
Ys
20
Po9
Qay
Tcrg
af
Qca
Gr4
Tcau
Qao
Qam
Qre
Qa
Qpl
Tcs
Qao
14
Ju
47
Qca
38
Qrpo
Qrpf
af
af
17
Ys
7350
90
Qra(?)
SVW
R
io
0
585
Qpl
Saf1
38
Qpl
Qao
af
5850
Tcrg
Tca
30
af
Tcau
QTsp(?)
@u
NO2
Tcrg
Tcau
Qca
Qao
Cr2
G
ra
nd
e
DEA
Qca
18
18
Qca
Qay
We2
Qrd
Vc1
Qca
Qay
60
Wa2
Sierra Ladrones Formation, piedmont member (QTsp, Miocene(?), Pliocene-lower Pleistocene) — reddish- to yellowish-brown conglomerate, sandstone, and
minor mudstone; contains weakly developed paleosols and upward-fining sequences of gravel, sand, and mud; contains limestone, sandstone and granite clasts;
sparse hypabyssal intrusive clasts present at northeastern end of map area; generally poorly consolidated; interfingers with axial-fluvial member (QTsa); 0-600(?) m thick.
12
536
Tuerto Formation (QTt, QTta, upper Pliocene-lower Pleistocene) — pale-brown pebbly to cobbly sandstone; unconformably overlies units QTsp and Tsp; locally
capped by petrocalcic soils with stage III+ to IV+ pedogenic carbonate morphology; clasts are predominantly limestone; Tuerto gravels of Stearns (1953); includes the:
gravel of Lomos Altos of Connell and Wells (1999) (QTta) west of the San Francisco fault, where the basal contact is 80-100 m above local base level; 4-18 m thick.
QTsp
17
Ys
Qam
Tcrg
af
Qay
60
60
Qay
Pnmr2
Qrpm
Qrl
Vc3
&m
22
Qam
Cr1
Qrl
Qca
Qam
Qay
Qrpm
Qay
Qay
LA9
MW3E
Qam
Qrd
af
Tca
af
Qao
WMF
Qae
Tcau
Qb3
&m
20
50
73
Qay
LA11
423
Qrpy
Tcrg
Qao
Qao
QTsp
556
16
&s
70
af
20
Qam
Qrpyc
Qb2
SWB2
Qay
Tca
PA1
SWB3
PR
B
Qrpm
Tcrg
Qay
Qre
Qa
22
0
11
15
`
95
528
Qa
Qrd
af
Tcrg
5 8 50
38
Qed
QTsa
Qa
5 10 0
Nmu5
73 5
9600
Qam
2
edge of R
io Gra
85
Qam
Qay
Qam2
Qao
eastern
5
Qre
8
QTsp(?)
Qao
Qam
20
15
86
Qam1
Qam1
Qam
Qay
Qae
Ys
Qam
Qay
Ton
0
7
78
Qay
Qrpy
QTt
72
af
Qrpo
Qrl
87
QTsa(?)
00
20
Qam1
Qam
Qre
Qrpf
70
Qam
Qam2
Qa
Qrpy
Tcrg
Tcrg
af
39
20
67
45
Tcrg
Qay
Qay
71
Qa
33
QTsa(?)
QTc
3
Qay
15
Ys
&s
SPW
Qrm
&s
10
34
Tcrg
2
Qay
585
Qam
Qay
&s
Ys
&m
8100
50
103
5850
Tcrg
Qca
83
Qam2
Qa
Qae
Qam
20
76
Qrpm
Rru17
13
Qam2
Qao
Qam
SA-10
Qay
Tcrg
Qed
5 8 50
448
Qao
39
Qre
Qrpf
Qay
QTc
10
Ys
Xs
528
Qae
35°15'
QTt
15
45
Tcs(?)
SA-11
QTt
QTt
Older stream-valley alluvium (Qao, Qao1, Qao2, Qao3, Qao4, middle Pleistocene) — light reddish-brown sand and gravel; soil development is variable and
exhibits stage I to III carbonate morphology with few or no clay films; divided into four subunits based on surface morphology, soil development, and inset relationships
(from youngest to oldest):
subunit 4 (Qao4), subunit 3 (Qao3), subunit 2 (Qao2), and subunit 1 (Qao1); 2-14 m thick.
Sierra Ladrones Formation, axial-fluvial member (QTsa, Miocene(?), Pliocene-lower Pleistocene) — light-gray to yellowish-brown sand, pebbly to cobbly sand,
and sparse interbedded mud; clasts dominated by rounded othoquartzite and volcanic rocks; deposits associated with the ancestral Rio Grande; interfingers with
piedmont member (QTsp); contains early Irvingtonian mammalian fossils (SB-1, Table 1); base not exposed; estimated thickness more than 300-800 m.
70
40
Qpl(?)
9
57
Intermediate stream-valley alluvium of Tijeras Canyon (Qamt, Qamt1, Qamt2, Qamt3, middle Pleistocene) — sand and gravel associated with former drainage
courses of Tijeras Canyon; gravel composition more diverse than in intermediate stream-valley alluvium (Qam) and contains greenstone and sandstone; interfingers
with intermediate stream-valley alluvium; divided into three subunits:
Younger subunit (Qamt3), Intermediate subunit (Qamt2), and Older subunit (Qamt1); 5-43 m thick.
QTsa
Tsp
67
Qca
Intermediate stream-valley alluvium (Qam, Qam1, Qam2, upper-middle Pleistocene) — yellowish-brown to reddish-yellow sand, silty clay, and gravel; granite
and limestone clasts dominant east of Rio Grande; variable lithology, dominated by chert and volcanic clasts west of the Rio Grande; surface is commonly mantled
by eolian sand; variable soil development; divided into two subunits: Younger subunit (Qam2) contains moderately developed soils (stage II and III carbonate
morphology); Older subunit (Qam1) contains weakly developed soils (stage II carbonate morphology); 5-43 m thick.
Older stream-valley alluvium of Tijeras Canyon (Qaot2, Qaot1, middle Pleistocene) — sand and gravel derived from former drainage courses of Tijeras Canyon;
divided into two subunits: younger subunit (Qaot2) and older subunit (Qaot1); 0-15 m thick.
10
9
78
Qam1
Qao4
Qao3
Qao2
Qao1
11
19
16
16
Qam2
Corrales
Qamt2
Qamt1
Pay
5
50
Rio Rancho
Qamt3
10
Qa
58
Tcrg
58
QTsp
Younger stream-valley alluvium (Qay, upper Pleistocene-Holocene) — pale- to light-brown sand, muddy sand, and pebble to cobble gravel; boulders locally
present along front of the Sandia Mountains; weakly developed soils (Stage I and II carbonate morphology); locally contains active stream-valley alluvium (Qa);
radiocarbon dates on detrital charcoal yielded radiocarbon ages of 1790±90 and 4550±140 radiocarbon years (SC-1 and SC-2, Table 1); up to 24 m thick.
3905
165
&s
Tcrg
Qam
35
72
Qrpo
Qao
Active stream-valley alluvium (Qa, historic-Holocene) — light grayish- to yellowish-brown sand, silty to clayey sand, and gravel; boulders are common along the
western flank of the Sandia Mountains; associated with modern incised stream valleys; very weakly developed (stage I carbonate morphology) to nonexistent soils;
1-12 m thick.
60
Qay
Qam
1
Qa
Ton
17
10
13
Qay
Undivided ancestral Rio Grande deposits (Qru, upper-middle Pleistocene) — undivided fluvial deposits associated with the ancestral Rio Grande in the San
Felipe Pueblo quadrangle; probably correlative to Los Duranes and Edith Formations (Qrd, Qre).
Tzp
Qca
Qao
Qae
Qay
Qru
14
15
12
27
Qam2
QTsa
Lomatas Negras Formation (Qrl, middle Pleistocene) — pale-brown to pink sandy pebble to cobble gravel that unconformably overlies a low-relief strath cut on
the Ceja Formation (Tc, Tcs); disconformably overlain by older stream-valley alluvium; oldest inset terrace deposits of the ancestral Rio Grande; 65-75 m above Rio
Grande floodplain; proposed by Connell and Love (2001); commonly 3-12 m thick, but locally reaches 18 m in thickness near the mouth of Arroyo de las Calabacillas.
Qam1
14
30
Qrl
Tcc
Pay
81
QTsp
Qa
21
Qca
72
Edith Formation (Qre, middle Pleistocene) — pale-brown to yellowish-brown pebble and cobble gravel, sand and sandy clay typically exhibiting a single upwardfining succession; locally contains white diatomite bed; disconformably overlain by intermediate stream-valley alluvium (Qam, Qam2, Qam1, Qamt2) and Menaul
Member of the Los Duranes Formation (Qrm) deposits; 12-24 m above Rio Grande floodplain; defined by Lambert (1968); 2-12 m thick.
Qam2
20
12
14
86
Qa
Qay
Sandia
Pueblo
6
Xv
Xv
Qre
Pay
12
Qls
Xv
77
Qam2
Qae
Tcrg
Tcrg
Qay
25
15
A'
20
62
§
¦
¨
Qa
Qrpm
Qe
Qay
Qam2
Qam1
Qay
79
11
Qay
18
10
72
Xg
Qay
25
&s
39
65
Qam1
Qay
2
Qam
Qae
Rru19
8
00
Qay
Qrpo
Qe
QTsp
Qao2
16 Qao2
10
17
85
56
45
QTsa
Pay
72
40
Qrm
Tcs
Qrpf
Tcs
36
Qam2
8
30
&m
Xs
72
30
Qao3
23
Qls
75
Qao2
QTsp
Qa
af
60
Qca
76
Qrpf
Tcs
Qca
QTsp
30 Pay
64
25
Ys
32
56
Qre
Qam
Qay
Qam2
@u
Qao1
45
6
87
Qam2
Qam
ILC
Qe
Qam2
80
Qrpo
af
Qae
Qao
35°15'
77
&m
Qam1
Tcs
Pay
27
22
Qrd
Qay
Qae
Qao
Rru6A
Qam
Qca
20
55
313
Qa
Psg
36
Pay
22
18
&s
17
36
@u
@u
Psg
@u
Qay
6
9
BM
Rru22
Qae
Tcs
Tcrg
Ton
Qam
Qe
3
Qao
Qam
Qrpy
5
Rru10A
Tcs
1
72
12
Tcrg
3
Qam
Qa
QTc
5
Qam
Qae
5
4 Ton(?)
Qao1
Qa
Qrpm
@u
Qao3
37
Qao3
Qao3
22
18
32
Placitas
Ju
Ju
Ju QTta
Qam1
528
Qay
Qrl
1
Rru7
Qam
Qam
70
Qao
05
QTsp
Qam2
Qrl
Qam
Qae
Qe
QTc
Qam2
Qrpf
Qrpo
Qay
7
Qae
Rru13
Tca(?)
QTsa
Qao3
Qay
10
Qao
Xv
Kmh
@u
QTsp
Qam2
39
Pay
Qao3
7
Qa
Km
QTsp
Km
24
00
66
8
Tcs
QTsa
7
Qao3
Los Duranes Formation, Menaul Member (Qrm, middle Pleistocene) — yellowish-brown pebble gravel and pebbly sand; probably a coarse-grained lens of Los
Duranes Formation; overlies intermediate stream-valley deposits (Qam1) and Edith Formation (Qre); typically overlain by intermediate stream-valley deposits of
unit Qam2; originally defined as Menaul formation by Lambert (1968); 26-36 m above Rio Grande floodplain; less than 3 m thick.
QTta
23
@u
Kd
Ju
Qao
Kmh
24
75
60
Qay
Kvm
55
Qay
QTsp
QTsp
Qre
2
39
4
Tcs
Td
165 Qao3
Km
Qrm
QTt
Tsp
SA-29
Km Kmh
Qca
Qao
18
Kvm
Km
8
Qre
Lomos
Altos
58
34
58 Kvp
Los Duranes Formation (Qrd, middle Pleistocene) — pale-brown to light reddish-brown sand, sandy gravel and sandy clay; weakly developed soil (Stage I
carbonate moprhology on sand) on Segundo Alto terrace surface ; inset against Lomatas Negras Formation (Qrl); locally subdivided into the Menaul Member (Qrm);
defined by Lambert (1968); 40-52 m thick.
Qaot1
Qay
QTta
34
QTsp
Qao3
Qrpm
Tcrg
80
Tcrg
Qrl
70
2
SA-5
Qam
4
3
Ton
Qae
Qae
Td
Tcs
Tcs
af
Qay
3
Rru20
QTsp
Pay
6
Qrd
Qaot2
18
Kvm
Tsp
Plt
2
Bernalillo
4
16
Arenal Formation of (Qra, upper Pleistocene) — pale- to yellowish-brown pebbly to cobbly sand; weakly developed soil (stage I to II+ carbonate morphology on
gravel) on Primero Alto terrace surface ; inset against Los Duranes Formation (Qrd); proposed by Connell and Love (2001); 3-6 m thick.
Psg
21
Pay
Tsp
Qao3
Kvm
16
8
Qrpm
af
Qa
Tcs
Qae
Qay
Qe
Qao
7
3
Tcrg
Qae
Tzr
Qrpm
QTta
Qa
&m
25
7
Qa
Qrd
3
Qe
Rru16p
Qay
Qay
Tcrg
Qay
5
Qa
Qe
Qe
17
1
Qa
Qra
Qay
56
21
18
12
7
zuma
M o n te
Tzm
Qe
Qa
BWT
3
Tcrg
3 Tcrg
Qe
Tcrg
Qam
Tcs
SA-12
Tcrg
Qa
Qay
Qao3 QTsp
3
QTsa
QTsa
Qa
Qam2
Qrpm
Qay 5
Qay
Qao
23
f
Crest o
Tcrg
Qam
Ton
Qa
27
Qao3
Qam
3
Qao3
SA-4
Qpy
Qao3
Qao3
Tcs
Qrpf
af
af
af
Qam
Qa
Qay
Qae
Qay
Qay
Qa
Tcrg
3
PBR
Qao3
Qam
WMN
Qam
9
Qam
Lmc
Cuchilla Lupe
Qca
Qrd(?)
Qrd(?)
QTsa
2
Qam
Qao
Qay
Tcrg
Tcs
Ctg
Qa
Qrpo
Rru12
Qrl
QTc
Qae
Qe
9
3
QTsa
Qa
Qa
11
Sap2 Qrd
Qay
Qae
85
Tcrg
Qae
PW143
18
Qam
QTsa
Tcrg
QTc
Be4
4
Tcs
Qay
Qrpf
Sap1
af
Tcs
5
Tcrg
Qae
Qay
Qae
af
Qpy
7
af
Qay
Qay
Qam
Qca
Qa
Qae
550
5850
14
QTsp
SAFR
Tcs
t
u
5
Qe
Qay
Qay
Qay
29
Qao3
Qao1
41
20
18
Qao3
Ihs
af
Qay
3
Qao1
5
af
Qao
Qam
Qay
Qay
Qrpyc
Qa
SA-18
Qao
Qa
Tcrg
Qa
Qam1
QTsa
SA-1
Tcs
Qao
30
QTsa
Qam
af
Qay
7
Tcs
Qam
Tcrg
Qae
313
af
67
Tcs
Qe
Qrpy
Qam2
18
D
2
Qrm
@u
23
19
QTsp
5
Qao
78
12
Qao3
af
QTt(?)
4
3915
Qam
Qam
Qao4
5
9
o
SFP3
39
Tcs
4
Rru9
Qra
35°22'30"
Qao3
Qao3
QTsp
Tcs
Qrpf
Sagc
Qay
8
Qao
Qe
3
Tcs
15
Qay
af
Qrpf
Qao
Qae
Tcrg
Qay
Qae
Qrpy
Qa
af
1
Tsp
Qam2
QTsa
Qre
Qrpm
Sasf1
6
Qae
26
6
Qam
Tcs(?)
QTc(?)
Tcrg
5
76
8
Qay
Qam
Qe
Qao
Qao
Qrpy
Qrpf(?)
Qao2
Qao1
Qam
Qam1
Qao3
Qam
Qrd(?)
Qrd(?)
Qay
Qay
2
Qay
Tvcb
3
QTsa
Qam
39
7
Qao2
c
Francis
de San
Tcrg
Qay
6
Tcs
2
Qam
Qao
6
1
a
Cuchill
Qay
Qam
PHX
10
Rru18
Tcs(?)
7
QTt
QTsp
3
27
Qam
Tcs
Qrpy
Qrpm
3
Ju
Tvcb
28 Tvc
Qa
6
Tcs
6
8
10
7
4
Qay
76
11
Tob(?)
4
8
8
1
Tcs
Qao2
QTsp
Qre
19
Qam
Qre
Qay
23
5
Qay
2
Tcc
Qae
Tob(?)
4
Tob
63
67
Tzr
4
Qao
Tcrg
8
SA-9
5
Qa
Qay
Qao
6
SA-21
Qa
Tcc
Ton
Top
Tcrg
Qay
6 SFP1
Qrpf
Qe
18
Qao
4
Qao1
15
Qa
RWP17
18
11
QTsa
Qam
Qrpm af
Qrpy
4
2
Qam2
4
6
1
Qa
4
QTsp
25
Qrpm
4
6
Qao
Qae
Rru15
Tcs
2
Qao2
4
9
RG-153
RG-63271
Qls
2
3
Tcrg
10
Qao
Qae
4
3
Tcc
Qay
4
6
Qao
Top
Qe
Qa
Qls
Tb
Qae
af
Qrpf
Tcs
5
Tcrg
Qe
Qao
2
Tc
Top
Tc
QTc(?)
Tcrg
Tcrg
Qay
58
70
12
65
67
Qay
Qae
Tzm
Tcrg
67
4
Tcrg
Qe
Qay
80
67
Tcrg
6
SA-17
Qam
QTc(?)
Qae
Tcrg
Qao
Qae
Qay
Qay
3
QTc
Tcrg
4
Tcc
Tb
QTsp
af
Qrpf
Qay
Qe
SA-15
Qam1
Qao3
RWP-1
Qrpy
76
11
7
65
QTsp
Qa
Qls
Qls
25
Qrpf
Tb
Qca
Qe
Tob
60
Qay
Qca
39
15
Qca
Qay
Tc
Tc
13
Ton
2
Ton
Qay
Qay
Qay
550
7
Top
Ton
t
u
SA-25
65
Qay
Qae
Ton(?)
7
8
Qay
Qay
Qls
Tb
af
16
Qay
Top
Tob(?)
Tcc
8
Top
Tc
Tcc
10
16
35°22'30"
Qay
Qae
Qe
§
¦
¨
Qrpf
QTsa
Qao2
NEOGENE
Tca(?)
66
8
Qca
Qae
Qae
QTsa
Qam(?)
Qrpf
Qay
QTsa Tcs
Qay
Qa
Qrd(?)
Qao
Qca
3
PA LEOG ENE
Qae
af
Qa
6
5
Tcs
Qca
Ton(?)
Qay
Qam(?)
Qay
Qay
46
Tcrg
Qae
6
8
Top
Tc
Qam
Qay
Qam
af
Qam
67
Ton
67
5850
Qa
11
Top
29
11 68
63
Qae
20
8
10
6
Qay
Qca
Qae
20
12
5
Ton
7
Qam
Qam
Qao
Qam2
MESOZOIC
7
7
6
Tc
Ton
8
Qam1(?)
QTsp
Qam1
QTsa
PALEO ZO IC
Ton
Qay
16
Top
Qam
20
7
3
Top
Tcrg
29
20
Qe
75
Qay
Qam
2
Qrpm
C
C
C
Ys
C
unconformity
Xu Xs Xv Xq Xg
PROTERO ZOIC
Tc
Qae
Qay
SA-26
Qao
Tc
Qae
Qao
5
Tc
Tc
Tcrg
8
Qls
SA-7
Qay
HOLOCENE
3
Tcs
Qao
PLEISTOCENE
Ton
SA-13
Qe
25
Qe
Qca
Qam2
Las Padillas Formation (Qrp, historic-upper Holocene) — fluvial deposits of the Rio Grande; pinkish-gray to grayish-brown sand and pebbly sand with lenses of
reddish-brown silt and clay; contains paleochannel, point-bar, and overbank levee deposits; underlies modern (inner) valley of the Rio Grande; very weak to no soil
development; base not exposed; 15-34 m thick in wells; proposed by Connell and Love (2001); divided into 8 units based largely on surface morphology (Kelson et
al., 1999):
Modern channel deposits (Qrpc, historic) — active channel and floodplain of Rio Grande since 1951.
Modern floodplain deposits (Qrpf, historic) — channel and floodplain of Rio Grande prior to 1930s.
Younger channel and floodplain deposits (Qrpy) and younger channel (Qrpyc) deposits (historic-upper Holocene) — sand, silt, and clay with gravelly interbeds.
Intermediate channel and floodplain (Qrpm) and intermediate channel (Qrpmc) deposits (upper Holocene) — sand, silt, and clay with gravelly interbeds.
(Older channel and floodplain (Qrpo) and older channel (Qrpoc) deposits (upper Holocene) — sand, silt, and clay with gravelly interbeds.
PLIOCENE
SA-14
Tc
Qe
Qae
5 1 00
1
Ton
Qca
Qay
ue
Qrpc
Qrpf
Qrpy
Qrpyc
Qrpm
Qrpmc
Qrpo
Qrpoc
MIOCENE
Qae
Tcc
SFP-E
20
OLIGO CENE
1
6
Ton
6
Qrpy
Qay
Qao
Qam2(?)
Qay
Qa
22
9
Tob
SA-19
Tc
Qa
Qae
8
Top
2
Top
4
12
Qay
To
nq
39
QTsp
Qam2
yo
af
Qls
Qam1
rro
SA-3
5
Qca
Qca
A
PALEO CENEEOCENE
5
Qay
Qam
32
QTsa
CRETA CEOUS
2
Qae
Tbv
8
Ton
12
Tb
QTsa
JURASSIC
SA-20
Qay
Qam2
Tb
Qrpy
TRIASSIC
Ton
6
Qae
Tbv
Older eastern-slope alluvium, undivided (QTp, upper Pliocene(?)-lower Pleistocene) — cobble and boulder gravel along eastern dip-slope of Sandia Mountains;
dominated by rounded limestone clasts; surface is commonly partly stippled and locally exhibits stage III+ carbonate morphology; may be partly correlative to the
Tuerto Formation; up to 10 m thick.
QTp
MISSISSIPPIA N-PERMIAN
20
7
8
Qao
2
Qao
Qa
RG-33435
2
Qru
Qls
Tcs
Qru
Qca
Qam
Qay
Tcc
8
4
3
39
4
2
2
2
3
4
15
Qls
Qay
9
Qae
Tcc
8
Qca
10
85
2
Qpm1
Intermediate piedmont-slope alluvium (Qpm, middle Pleistocene) — pale- to strong-brown silty sand, clayey sand and gravel; contains weakly to moderately
developed soils (stage II, III+ carbonate morphology); divided into older (Qpm1) and younger (Qpm2) subunits; 9 m thick.
MESOPROTEROZOIC
66 00
4
70
7
8
6
Qe
Tcc
Qae
2
Qpm2
PALEOPRO TEROZOIC
5
6
Qay
12
QTsp
Qrd(?)
Qae
Qay
Younger piedmont-slope alluvium (Qpy, Holocene-upper Pleistocene) — light-brown sand, muddy sand, and pebble to cobble gravel; boulders locally present
along front of the Sandia Mountains; weakly developed soils (up to stage I carbonate morphology); up to 12 m thick.
UPPER
78
Qay
5
5
Tob(?)
Qam
QTsp
Qae
Qam
Qpy
MIDDLE
4
Tcc
Qae
Qay
SA-8
LOWER
4
17
Tcs
9
Qam
Qb*
83
4
9
10
5
4
5
Qam
Qao
Tbv
Tcs
Tcs(?) Qca
Qae
4
2
Calabacillas Formation (QTc, upper Pliocene(?)-Pleistocene) — pale-brown to yellowish-brown sand with interbedded pebbly sand, mud, and multiple buried
calcic paleosols (stage I to III+ carbonate morphology); associated with hanging walls of intrabasinal faults (e.g., San Ysidro fault); generally poorly exposed; defined
by Connell (in preparation); 0-30 m thick.
XY*
Qae
21
Qae
SA-22
6
6
5
7
Qay
75
Tb
RG-45641
Qrpy
QTc
Ts*
Qae
66
Qed
5
Qa
9
6
7
Ton
2
Qae
85
3
Santa Ana
Pueblo
QTsa
RWP-3
Qls
Eolian sand and alluvium, undivided (Qae, Holocene-upper Pleistocene) — pale-brown to light reddish-brown, moderately sorted, sand and silt with scattered
pebbles; weakly to moderately developed soils with stage I to II carbonate morphology and clay films; 1-3 m thick.
To*
Qae
6
Ton
Qe
9
Tb
Qls
Qae
os
Qao
Qay
Tbv
Qca
Colluvium and alluvium, undivided (Qca, Holocene-Pleistocene) — sand and gravel from nearby hill slopes and along margins of mesa-capping lavas;
weakly to strongly developed calcic soils (stage I to III+ carbonate morphology); up to 5 m estimated thickness.
Tz*
2
5
3
12
Qca
Tgd*
2
2
Qay
Qay
10
5
Tob
10
11
5
Qam
Qay
Qam
Qae
San Felipe Pueblo
Qae
Qam
Tbv
Qam
Qao
5
7
60
nde
terra
ces
Tg
5
6
9
7
5
Tcs
Qae
Tcc
5
8
6
Qam
Ta
n
Tls
Landslide debris (Qls, Pleistocene) and landslide megablock (Tls, Miocene(?) or Pliocene) — massive to chaotically bedded sand, gravel, and mud derived
from steep hill slopes; includes large Toreva blocks along margin of Santa Ana Mesa; older landslide megablocks (Tls) are large allocthonous blocks of Madera
Group limestone resting on sheared Sandia granite (Ys) along the southwestern base of Sandia Mountains; 6-30 m estimated thickness.
Mz*
80
Qay
16
Qae
Qae
QTsa
Qca
8
ad
el
3
os
Tb
Qls
Pz*
Tcc
Tg
Qae
3
Qay
Tcc
12
Tbv
Tcs
Tb
Qao
Qrp*
Tzm
Qay
Tcc
9
Qao
6
4
28
Ton
5
Qao
Ton
10
19
de
la
Ve
g
Eolian sand dune (Qed, Holocene-upper Pleistocene) — pink to light yellowish-brown, well sorted sand primarily recognized as moderate-relief narrow dunes;
weakly developed soils with stage I to II carbonate morphology; 1-33 m thick.
Qed
Qpm
Qls
5
Qa
5
5
6
Ton
5
Tcc
Tcc
Qe
Qae
Tcs
Qae
Qao
Qrp*
3
12
5
5
Qay
Qam(?)
2
ro
yo
Qa
Tbv
Qae
Tob(?)
Ar
Eolian sand, undivided (Qe, Holocene-upper Pleistocene) — pink to light yellowish-brown, well-sorted sand recognized as laterally extensive, active and
inactive sand sheets and discontinuous low-relief dunes; soil development is weak (stage I to II+ carbonate morphology) to nonexistent; north to northeast
dune-crest orientations; 1-3 m thick
Qam
6
69
7
19
Qay
QTsa
Qrpf
Qe
Qamt
Qao
9
16
7
Qao
Qam
Qam
Tbv
68
Qe
Qam
47
9
7
Tcc
14
Qae
Qay
16 22
10
Qe
Qae
Tcc
Tcc
5
16
4
Tcc
Qao
3
Ton
Qca
14
Qam
Qe
Tbv
Playa-lake deposits (Qpl, Holocene-upper Pleistocene) — silt, mud, and sand in local depressions on low-relief surfaces; less than 2 m thick.
Qao
Tzm
Kvm
18
5
11
5
Ton
11
8
4
16
Qca
Qam(?)
Qam
Ton
QTsp
Qrpf
Qpl
39 25
Tc
9
Tcc
9
3
4
7
Qao
6
5
5
8
12
ez
m
Je
16
6
6
Qa
Qao
5
Tcc
Qae
Qae
QTsa
To*
8
8
Qrd(?)
Qae
Qay
Qao
Qay
Qay
9
Qam
Qay
Qe
Qam
Qrpo
Qa
RWP-7
Tz*
8
Tcc
Qay
Qb*
64
Tzm
14
5
Qay
18 Tcc
12
5
Qay
Qay
Disturbed land and artificial fill (af, modern-historic) — excavations and areas of artificially deposited fill and debris; delineated where areally extensive;
includes deposits associated with floor of Jemez Reservoir.
af
Qrpy
Fluvial (terrace) deposits of the Rio Grande
Qe
25
Qa Tzm
Qa
Tcc
Tbv
Qay
Qao
Ton
Qao
Tcc
Qa
Qa
Pediment surface (upper Pliocene(?)-Pleistocene) — erosion surface, mostly cut on Sandia granite (Ys); common along southwestern flank of Sandia
Mountains, Tijeras Canyon, and northern Manzanita Mountains.
Tributary stream-valley alluvium
Qa
6
Tbv
Qru
Qam
Qrd(?)
QTct
8
16
Ton
18 Qam
QTct
5850
Qay
13
Qao
Qae
Tcs
Qrpyc
upper
31
6
7
5
SB-4
6
6
8
5
Qay
10
Qae
Tbv
67
Qam(?)
Qrpc
Qay
Qrd(?)
middle
7 Tzp
Qao
Km
Kvp
5
Tcc
Qe
Qrpf
Lomos Altos geomorphic surface (upper Pliocene) — depositional top of gravel of Lomos Altos (QTta), exhibits strongly developed petrocalcic soils
with stage IV carbonate morphology; defined by Connell and Wells (1999); 21-92 m above local base level.
lower
Tzm
Tzp
5
Ton
Ton
12
Qe
4
12
11
Tcc
12
5
Kvm
Qe
12
Km
39 25
Tcc
Qe
8
Qay
Qay
Mesaverde Group
Qe
8
SB-3
4
Ri
o
Qay
Qay
16 11
Tob(?)
77
Qam
1
Mancos Shale
SB-5
10
Qe
Qe
6
Tcc
Qae
13
8
Qam(?)
QTsa
Qrpm
Qrpf
includes Santa Fe Group volcanic
Tzp
43
5
10
Tcc
68
5 85 0
7
72
9
Qay
68
1
Llano de Albuquerque geomorphic surface complex (upper Pliocene-lower Pleistocene(?) — depositional top of Ceja Formation (Tc, Tcrg); exhibits
strongly developed petrocalcic soils with stage III+ to locally weak stage IV carbonate morphology; dashed hachures denote inferred relict surfaces;
modified after Machette (1985); 215-110 m above Rio Grande floodplain.
SURFICIAL DEPOSITS
Tg
Qe
Km
SA-27
12
8
Qay
Qay
QTct
Qao
Tbv
7
Qao
60
10
Qca
Sunport and Las Huertas geomorphic surfaces complexes (lower Pleistocene) — local depositional top of Sierra Ladrones Formation (QTsp); exhibits
strongly developed petrocalcic soils with stage III+ carbonate morphology; Sunport surface defined by Lambert (1968); Las Huertas surface defined by
Connell and Wells (1999) north and northwest of Sandia Mountains; 92-122 m above Rio Grande floodplain.
PIEDMONT-SLOPE
Qa 48
5
Qao
Ton
Tb
Qay
RIO GRANDE VALLEY GROUP (SEDIMENTARY)
21
9
Qa
Qa
Qao2
SANTA FE GROUP (SEDIMENTARY)
Tg
10
18
Qam
11
7
83
5
75
9
Qay
Qae
12
Qay
15
Qe
Tzm
11
Ton
Qa
QTsa
PRE-SANTA FE GROUP SEDIMENTARY
11
18
Kvm
2
7
20
Qay
9
Qay
11
Qrpf
CENOZOIC VOLCANIC & IGNEOUS
Qe
Qa
Qa
Tg
Tcc
Qrpo
PROTEROZOIC CRYSTALLINE
7
Tzp
Qao
Tcc
Qe
QTct
Qam
7
Qay
Segundo Alto terrace surface (middle Pleistocene) — depositional top of Los Duranes Formation (Qrd) and intermediate stream-valley alluvium (Qam);
exhibits weakly developed calcic soils with stage I-II carbonate morphology; defined by Lambert (1968); 42-48 m above Rio Grande floodplain.
6600
16
9
Tg
3
4
Qe
Qay
Qao
Tbv
Qae
8
Qao2
ala
Qe
Tg
Tcc
Qay
48
8
RWP-2
885
0
Qe
21 43
Km
40
Tg
18
Qe
3
Kvm
Qam(?)
Qrpm
Qay
Esc
Km
31 Kvm
Arro
y
Kms
31
Qae
Qae
SA-23
Tcc
Tb
Qca
Qrpy
Qrpyc
QTct
a d
e
45
13
14
Kvm
SA-28
Qe
Qao
17
Ton
Qrpy
ill
Kvp
Qae
Qam
12
Ton
Qay
Qrpm
ch
Qao
Kvm
75
16
Qay
Qe
Qay
26
Tcc
Qae
Primero Alto terrace surface (upper Pleistocene) — depositional top of Arenal Formation (Qra); exhibits weakly developed calcic soils with stage I-II
carbonate morphology developed on gravel; originally defined by Lambert (1968) for his Edith Formation on west side of Rio Grande; 15-21 m above
Rio Grande flooplain.
Qay
Qao2
Cu
Kvp Kvm
Km
Qae
Qe
Qao
Qam(?)
Qam(?)
Rio Grande
deposits (QT
sa)
Km
SA-24
Qae
Tbv
l
Qay
Tg
70
Qae
ancestra
Km
Kvm
Qe
30
5
Km
55
ed g e o f
Kms
33
9
Qe
Tpc
35°30'
Qao1
n
Kms
Km
Kvp
15
eastern edge of ancestral
Kd
Km
20
47
Qe
Tcc
Tbv
Explanation of Map Units
375
Qam
wester
Qao
Km
26
Qca
9
Qe
70
Tbv
10
Tb
Qay
3
3 65
Qay
Tb
Qe
Tpc
Qay
Tcc
Qe
Qae
Tcc
15
Qae
Qay
Qae
5
Qay
Tcc
Qae
Qae
o O
jito
11
15
da
Kms Km
Km
t
u
550
Tzm
Para
Qa
Km
Tcc
9
Qay
11
Qao
Qe
Qay
10
0
Km
o P
iedr
a
Qa
Qe
Qae Qae
Qe
Qae
Qe
41
10
Qae
6
16
12
Ju
Tcc
Qe
Km
Km
Km
5850
-106°30'
a)
sits (QTs
o
p
e
d
e
d
Rio Gran
Kd
9
9
Qa
36
360
3 55
-106°37'30"
5 100
Qa
53 KdQam
Kd
4
350
3 45
-106°45'
Arr
oy
Qa
39 30 000m. N
340
0
3 35
85
-106°52'30"
3 30 000m.E
35°30'