NEW MEXICO BUREAU OF GEOLOGY AND MINERAL RESOURCES
NMBGMR Open-file Geologic Map 246
Last Modified June 2014
A DIVISION OF NEW MEXICO INSTITUTE OF MINING AND TECHNOLOGY
Neogene
35
Qtr1
Qa1
Psa
Tbmc
23
^m
3859000
14
Tbmc
C
^m
15
Qtr1
Qtr2
Qtr2
Qtr1
Pg
35
43
Tbmc
^m
^m
Psa
25
42
^c
24
11
Qtr1
^c
Py
6
34°50'00"
32
30
24
Pg
^m
26
Psa
Pg
Py
14
Psa
68
34
Qa1
Qtr2 ^m
16
44
29
38
52
Jt
Qt2
Tp
48
Qtr2
51
^c
Qoa
Qa1
Qtr2
8
Qa2
Tp
3856 000
7
10
20
15
^c
16
18
Qtr2
Qa2
Qtr1
26
24
Qs
^c
164
15
26
30
30
Qtr2
3855000
26
Psa
^m
Py
^c
^m
16
20
^m
35
3854000
33
7
Qtr1
20
12
20
10
Psa
36
Ti
B
25
26
12
Qa2
54
27
5
9
29
25
15
Qtr1
12
54
35
7
24
40
Qa1
9
7
6
15
Pa
19
*rt
24
22
38
39
Tbmc
3848000
16
11
17
20
19
13
16
*a
24
14
Pa
12
19
Qa2
306000
Tp
Qs
43
307000
308000
309000
^m
42
Qa1
Qa1
17
Tp
14
Qs
Qs
310000
107°05'00"
311000
Qs
312000
107°02'30"
314000
0.5
1000
0
Dalies NW
0
1000
2000
0.5
3000
1 MILE
4000
5000
0
6000
7000 FEET
1 KILOMETER
CONTOUR INTERVAL 20 FEET
15
315000
12
Tp
Qa2
Tp
9
316000
DRAFT
SOUTH
GARCIA SE
6
New Mexico Bureau of Geology and Mineral Resources
NEW MEXICO
Reverse fault - certain, location concealed, teeth on upthrown
block
Detachment fault - certain, location accurate, hachures on
upthrown side
The upper part consists of whitish-gray, thin-bedded, nodular limestone and gray shale (Kelley and
Wood, 1946). Fossil assemblages in the Red Tanks Formation include fresh water plant-eurypterid-
Detachment fault - certain, location approximate, hachures on
upthrown side
Approximately 450 feet thick.
Mesas
Mojinas
Belen NW
Magnetic Declination
July, 2012
9.23687º' East
At Map Center
QUADRANGLE LOCATION
New Mexico Bureau of Geology and Mineral Resources
New Mexico Tech
801 Leroy Place
Socorro, New Mexico
87801-4796
Mapping of this quadrangle was funded by a matching-funds grant from the
STATEMAP program of the National Cooperative Geologic Mapping Act (Award
Number: G13AC00186), administered by the U. S. Geological Survey, and by the New
Mexico Bureau of Geology and Mineral Resources, (L. Greer Price, Director and State
Geologist, Dr. J. Michael Timmons, Geologic Mapping Program Manager).
Geologic map of the South Garcia SE 7.5-minute
quadrangle, Valencia County, New Mexico
[575] 835-5490
June, 2014
This and other STATEMAP quadrangles are available
for free download in both PDF and ArcGIS formats at:
by
Jason W. Ricke s 1, and Karl E. Karlstrom 1
1Dept. of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131
Py
*rt
*a
View looking south of the Santa Fe fault, separating Santa Fe Group (Tsf
from Triassic Chinle Formation (^c) on the west. Perched travertine deposits (Qtr2) cover both the Chinle
Formation and Santa Fe Group at this location.
Atrasado Formation — Ridge forming, gray limestone and cherty limestone, with minor light-gray
to reddish-brown shale, sandstone and conglomerate (Zilinski, 1976).
*a
16
Inclined bedding, showing strike and dip
75
Overturned bedding, showing strike and dip
34°45'00"N
107°00'00"W
Geologic Cross Sections
B
A
7,000
ft. ASL
6,000'
Tbmc
^m
Psa
5,000'
Qtr2
Qtr1
Qa2
Qtr1
Kd
Jt
Jb
^m
Py
2,000'
0
*rt
Je
Jb Jm
Mesa
Tbs
10,000
6,000'
Qt2
Qs
Qa2
5,000'
*rt
4,000'
4,000'
Pa
3,000'
4,000'
^m
15,000
20,000
3,000'
2,000'
2,000'
1,000'
2,000'
*a and underlying Pennsylvanian
sedimentary and Precambrian rocks
1,000'
25,000
0'
Comments To Map Users
0'
0
5,000
10,000
15,000
20,000
Feet
A geologic map displays information on the distribution, nature, orientation, and age relationships
of rock and deposits and the occurrence of structural features. Geologic and fault contacts are
irregular surfaces that form boundaries between di erent types or ages of units. Data depicted
on this geologic quadrangle map may be based on any of the following: reconnaissance eld
geologic mapping, compilation of published and unpublished work, and photogeologic interpretation.
Locations of contacts are not surveyed, but are plo ed by interpretation of the position of a given
contact onto a topographic base map; therefore, the accuracy of contact locations depends on the
scale of mapping and the interpretation of the geologist(s). Any enlargement of this map could cause
misunderstanding in the detail of mapping and may result in erroneous interpretations. Site-speci c
conditions should be veri ed by detailed surface mapping or subsurface exploration. Topographic
and cultural changes associated with recent development may not be shown.
Cross sections are constructed based upon the interpretations of the author made from geologic
mapping, and available geophysical, and subsurface (drillhole) data. Cross-sections should be used as
an aid to understanding the general geologic framework of the map area, and not be the sole source
of information for use in locating or designing wells, buildings, roads, or other man-made structures.
The map has not been reviewed according to New Mexico Bureau of Geology and Mineral Resources
standards. The contents of the report and map should not be considered nal 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 authors and should not be interpreted as
necessarily representing the o cial policies, either expressed or implied, of the State of New Mexico, or
the U.S. Government.
C
7,000
ft. ASL
C’
Lucero
Mesa
Santa Fe
fault
Tbmc
6,000'
^m
Pg
5,000'
Psa
Qa2 Qtr2
Tbmc
^m
Qtr2
48
Je Jt
7,000
ft. ASL
Arroyo
Garcia
Qa2
Qa1
6
6,000'
Qoa
Qa2
Qa2
Jb
Py
4,000'
^c
*rt
Pg
Psa
3,000'
^m
Tp
Py
2,000'
*rt
1,000'
5,000'
4,000'
Pa
3,000'
Pa
2,000'
1,000'
*a and underlying Pennsylvanian
sedimentary and Precambrian rocks
0'
0'
0
5,000
3,000'
Tp
*rt
Psa
Feet
Pg Psa ^m
Py
Tp
Py
5,000
5,000'
5,000'
^c
Pa
Pg
Pa
Qa2
Kd
^c
Pa
Py
31
6,000'
Psa
Py
*a
Km
Black
Pg
Pg
3,000'
Jm
Jt
Je
Psa
Pa
Qa2
31
^c
Pg
Santa Fe
fault
7,000
ft. ASL
Santa Fe
fault
Tbmc
6,000'
7,000
ft. ASL
Tbmc
B’
7,000
ft. ASL
A’
*rt
Mesa
Gallina
Pg
3847 000
4,000'
Rio
Puerco
Psa
Syncline - certain, location concealed
Tbmm
NATIONAL GEODETIC VERTICAL DATUM OF 1988
White
Ridge
unconformity
Syncline - certain, location approximate
Tp
Qa1
Tp
^m
Syncline - certain, location accurate
18
14
Qa2
13
unconformity
Red Tanks Formation — Grayish-white to reddish-brown shale and sandstone interbedded with
gray limestone and limestone-pebble conglomerate. The lower part of the Red Tanks consists of
*rt
Anticline - certain, location concelaed
3848 000
Tbmm
^c
Abo Formation — Deep-brown to reddish-brown siltstone and shale interbedded with ridge
forming sandstone. The upper part is brown to light-reddish-brown, medium- to thick-bedded
arkosic sandstone and siltstone with minor shale.
Anticline - certain, location accurate
17
21
Tbmm
Je
Pennsylvanian
Anticline - certain, location approximate
Qs
22
1
Correo
18
Qa2
1
Roads...........................................................................©2006-2010 Tele Atlas
Names.............................................................................................GNIS, 2008
Hydrography............................................National Hydrography Dataset, 2009
Contours........................................................National Elevation Dataset, 1999
Tp
Tp
^c
Qs
Qa2
Qa2
1:24,000
Base map from U.S. Geological Survey 2010.
North American Datum of 1983 (NAD83) World Geodetic System of 1984 (WGS84), Reprojected to NAD27.
Projection and 1000-meter grid: Universal Transverse Mercator, Zone 13S
10 000-foot ticks: New Mexico Coordinate System of 1927(west zone), shown in blue.
South
Garcia
Qa2
9
Psa
29
Qs
Qa2
Qs
Tp
Tp
Qa2
43
Tp
12
Qa1
Qs
Psa
Py
Ti
Qa2
Tbmc
Qa2
34°45'00"N
107°07'30"W
9
15
Qt2
Qs
Qt2
30
60
Pg
Qa2
Qa1
40
77
35 Py
Qa1
10
^c
20
Ti
Qt2
49
Pg
17
13
3849 000
Qs
Qs
Qt2
40
19
Qa1
Qs
Tp
73
45
15
30
Qt2
^m
45
20
14
9
Qt2
55
6
Qt3
8
Yeso Formation — The upper Yeso formation consists of interbedded, reddish-brown to
orangeish-brown shale, siltstone, and sandstone with gray to white gypsum and limestone. The
Pa
Reverse fault - certain, location accurate, teeth on upthrown
block
Reverse fault - certain, location approximate, teeth on upthrown
block
Tp
25
70
31
42
18
^c
Psa
Pg
10
Py
Qa2
Qa2
34
Py
Normal fault - certain, location approximate, bar and ball on
downthrown block
Normal fault - certain, location concealed, bar and ball on
downthrown block
12
40
Qt1
Qa1
40
20
Psa
32
9
Normal fault - certain, location accurate, bar and ball on
downthrown block, tick shows dip
52
Qs
Qs
Jt
Jb
Fault - certain, location concealed
3850 000
15
Py
11
3849000
Tp
Jm
Fault - certain, location approximate
35
Qs
Qs
15
^c
31
10
Tp
^m
42
Glorieta Formation
bedding (Zilinski, 1976).
Fault - certain, location certain
Tbmm
Qa1
Qa2
67
9
Ti
7
fault
Pa
Qa1
Qa2
49
15
14
9
Geologic contact - certain, location concealed
Qtr2
28
34
50
11
Tbmc
Psa
Ti
10
3850000
39
44
32
Qa1
69
10
Pg
Geologic contact - certain, location approximate
Qs
12
Location of geologic cross section
Geologic contact - certain, location accurate
Qs
35
75
Pg
9
A'
3851 000
16
Fe
Qa1
A
Tbmm
Qs
Qtr2
38
Qa2
Qs
Qa2
Tp
47
Py
Qa1
Qs
Qs
30
Santa
Psa
Explanation of Map Symbols
Tbmm
Qs
Qa2
Qtr2
54
20
Qa2
Qs
41
5
Qs
47
Qtr2
25
34°47'30"
unconformity
San Andres Formation — Contains multiple lithologies, including medium to light-gray
nonfossiliferous limestone, grayish-white gypsum and argillaceous gypsum with gypsiferous
shale and secondary selenite, and minor light-brown shale (Zilinski, 1976). The San Andres is
commonly interbedded with the underlying Glorieta Formation, and the contact between the
two is placed at the lowermost limestone bed.
Psa
Qs
Kd
Permian
Qa2
Qs
Km
ripples.
Qa1
Qs
20 35
Pa
3852 000
Qa2
38
Ti
Moenkopi Formation
^m
observed. Qtr1 consists of recently-precipitated to actively-precipitating travertine in drainages
with active springs. These deposits are typically associated with salt deposits. Higher order
travertine terraces correspond to higher relative elevations in the local drainage.
Qa1
25 44
Qtr2
^c
44
40
Qtr2
26
30
Pa
3851000
lying and elevated above modern drainages. West of the Santa Fe fault the travertine deposits
Qs
34
36
50
19
41
10
17
17
27
Pg
29
16
16
57
15
Tbmc
Qs
Tp
^c
59
20
14
34°47'30"
Qtr3
^c
45
29
32
Qa1
Qs
52
27
6
Ti
3852000
B’
Qs
Sandstone and pebble-cobble conglomerate is composed of locally derived sandstone and
limestone clasts from the Paleozoic section, and minor basalt. Clasts are typically coated with
Qtr2
Qa2
Tbmm
Tp
323
Shinarump Member are exposed. Above the Shinarump Member the Chinle Formation consists
of moderate reddish-brown to pale-purple or whitish-gray bentonitic mudstone and siltstone
with minor medium- to coarse-grained sandstone beds. This unit contains the Ojo Huelos
Qtr1
3853 000
Qs
20
Py
Py
9
Qa1
24
50
66
Pg
10
59
Psa
34
7
35
43
28
7
Tp
30
Chinle Formation —At the base of the Chinle Formation, ~1-5 m of pebble conglomerate
^c
Qtr3
Pa
Triassic
Travertine (Pleistocene) — Terrace deposits consisting of banded travertine and/or sandstone
to pebble-cobble conglomerate which is well-cemented with travertine. Banded travertine
Qtr
Qtr2
299
Entrada Formation — Pale-yellow to grayish-yellow, medium-grained, well-sorted and wellcemented sandstone.
Je
6
Qa2
Qtr2
74
30
Qa2
Todilto Formation — Dark-gray, thinly bedded, fetid shale and limestone with
intraformational folds, faults, and breccia.
Jt
travertine. Terraces occur at several levels, where Qt1 is the lowest and relatively youngest
deposit, and Qt3
Qt1
Qt
19
44
15
Qt2
Tp
Tp
Qtr1
Qtr1
35
Qs
18
^m ^c
56
Qtr2
Qt3
3854 000
Bluff Sandstone — Well-sorted, rounded to subrounded, medium to coarse-grained, grayish-
Jb
Terraces (Pleistocene) — Well-cemented, poorly sorted, clast to matrix supported, angular to
sub-angular conglomeratic deposits situated above Qa2. Gravels are pebble- to-cobble-sized
clasts of sandstone, limestone, and basalt that are sometimes cemented with thin rims of
Qt
Qaf
52
61
34
20
15
Qtr2
Qtr1
Qtr2
^m
29
21
9
20
Qtr1 31
Qtr2
45
13
^c
16
C’
Tp
252
272
and locally derived, and include travertine, basalt, limestone, and sandstone. Deposits occur at
several levels above Qa2. Generally 1-3 m thick.
Qtr1
unconformity
Deposits associated with elevated geomorphic surfaces (upper Pleistocene)
Qs
15
Qa1
^m Qtr2
Tp
19
Qtr1
51 Qtr3
^m
^c
32
Pg
Py
Tp
16
Qoa
Qs
Qtr2
Py
Tbmc
Qa2
Qt2
25
3853000
14
24
19
11
10 Tp
50 51
3855 000
237
Morrison Formation — Brushy Basin Member of the Morrison Formation which consists of
grayish-yellow-green mudstone and siltstone with minor sandstone lenses. Sandstone is well-
^c
45
Qt1
Qt2
Qt3
Tbmc
174
Jurassic
Jm
Qs
unconformity
201
Older alluvial deposits, calcic soils, and eolian cover of piedmont areas (upper Pleistocene).
Qoa
11
distinctive 0.5-1 m thick matrix supported pebble conglomerate. Clasts are rounded to sub-
Older colluvium, alluvium between active channels, and minor eolian sand (Holocene to
upper Pleistocene)
m thick.
10
28
Qoa
Tbs
145
Dakota Formation — Very pale-orange to grayish-orange, well-sorted, rounded to subrounded,
Kd
Rio Puerco to the west. Gravel consists of locally-derived clasts of sandstone and limestone
derived from the underlying Paleozoic stratigraphy, chert from the Chinle Formation, basalt,
and travertine.
34°50'00"
Qaf
Tp
Qa2
Youngest stream alluvium (Historic to Holocene) — Unconsolidated deposits of silt, sand,
Qa1
100
Mancos Formation — Dusky yellow to moderate olive brown mudstone, siltstone, and
sandstone.
Km
Artificial fill
Qaf
Qaf
Qt2
41
Qtr
Pg
Pg
Jb
Je
Qtr2
Jm
34
^m
26
21
25
36
Pg
Psa
23
Qtr2
16
10
39
Tbmc
38
Jt Jb
26
Qtr2
Qtr2
Qa1
Jm
^c
31
Tbmc
Qa1
^c
20
21
Quaternary
10
66.0
Cretaceous
14
24
Qtr1
Map Unit Descriptions
3857 000
Qa2
31
Qtr2
Qtr3
56
Je
40
A sample of biotite-rich diorite gives a biotite Ar/
analyzed at the New Mexico Geochronology Research Laboratory at New Mexico Tech in
Qa2
Jt
Qaf
25
16
Pg
39
Tbs
31
Qtr
^m
41
Qtr2
Qa2
33.9
Tp
35
^c
37
25
20
Qtr2
Qtr2
Qtr2
^c
^m
39
^c
Qa2
20
3858 000
14
Qs
Qa1
23.0
Intrusive complex (Oligocene) — An intrusive suite of rocks, located mainly in the southern
region of the map area, intrudes into the Comanche monocline, generally following the NStrending fabric. In the south, the intrusive rocks form a stock, while to the north these rocks are
exposed as NS- to NE-SW-trending dikes that cross-cut the Paleozoic rocks. Petrologically, the
southern stock ranges from a biotite-rich olivine gabbro, to a microdiorite, to a biotite-rich
Tp
View looking north towards Carrizo Arroyo of the Lucero monocline. Flat-lying Pennsylvanian Atrasado (*a) and
Red Tanks (*rt) Formations are exposed in the valley to the west, and are capped by Permian Abo (Pa) and Yeso (Py)
Tbmc) caps Yeso Formation in the background. The steeply-dipping eastern
limb of the monocline is made up of Permian Glorieta (Pg) and San Andres (Psa) Formations. The Albuquerque basin
is to the east.
35
28
3856000
16
20
Qtr1
Je
30
36
3857000
26
^m
29
19
9
Jt
^c
Qtr3
Je
24
35
Py
20
41
14
Qoa
^c
^c
^m
Psa
21
^m
Qaf
Qtr
31
48
Qtr1
Qa1
Qa2
34
47
^c
Qa1
Qtr2
24
Paleogene
Tp
Qtr
^c
30
Qa2
Jt
^c
^c Qtr
32
Qtr
27
Py
Tbmc
45
5.3
(Lozinsky and Tedford, 1991).
Tbs
Je
20
42
3858000
Qtr
^m
39
sand, clayey sand, and conglomerate. Locally cross bedded. Clasts are angular to subrounded
3859 000
Qtr2
^c
20
Qtr1
25
Qtr1
Qtr2
^c
Qtr
Psa
30
^c
2.6
Popotosa Formation of the Santa Fe Group (Miocene) — Poorly to well-indurated, poorly
Ti
20
^c
24
Qtr2
Qa2
Km
30
Pg
Qtr1
17
^m
16
^c
Qtr1
47
Tbmc
Km
59 Qtr2
Qtr1
Jb
Qaf
20
Km
Kd
Jb
28
Km
Km
Jm
Qaf
Qtr2
Qtr1
44
25
20
Tbs
Qtr1
23
14
Qa2
0.01
Basalt of Mohinas Mountain (Miocene) — Black to dark-gray, dense basalt and olivine
diabase. Occurs as cone sheet within mountain and as sills and dikes around mountain
(Lozinsky and Tedford, 1991). To the north of Mohinas Mountain at Hidden Mountain,
.
3860 000
Qtr
Qtr2
A’
Qt
38
Qtr2
Qa2
Qtr
34
Km
(Bachman and Mehnert, 1978).
Km
Qaf
Upper
^c
Qtr2
Qa1
Qa1
39
Igneous Rocks
Sediments and Sedimentary Rocks
Upper
Jm
42
Kd
Km
Qtr2
Qtr1
20
11
Qt
Mesa Carrizo basalt flow (Pliocene) — Dark-gray basalt with euhedral plagioclase and olivine
Tbmm
Qa2
0
Middle
Qtr3
Psa
^m
Suwanee basalt flow (Pliocene)
Tbmc
34°52'30"N
Middle Middle Upper
24
Qtr2
317000
Lower
A
3860000
107°00'00"W
316000
NEOGENE
QUATERNARY
Miocene Pliocene Pleistocene Holocene
Qt
26
315000
Qa2
Tbs
54
Km
Qtr2
Qtr1
Qtr2
Qtr1
Qtr2
^c
38
Kd
Qa2
21
^m
Km
Jb
Tbmc
314000
Age (Ma)
Qtr2
Tbmc
^m
107°02'30"
PALEOGENE
Oligocene
^c
313000
41
Qt
19
16
Psa
312000
CRETACEOUS
^c
^c
311000
JURASSIC
^c
310000
Jm
^c
Qtr1
Tbmc
107°05'00"
309000
TRIASSIC
34°52'30"N
308000
PERMIAN
307000
306000
Correlation Of Map Units
PENNSYLVANIAN
107°07'30"W
10,000
15,000
20,000
Feet
25,000
30,000
35,000