Petrography
wellsnear
andstratigraphy
0f Seville-Trident
exploration
Deming,
NewMexico
byBusse//
E. Clemons,
Professor
of geology,
NM88003
NewMexico
LasCruces,
StateUniversity,
Abstract
Methods
Petrographic
analyses
of cuttingsfrom four wildcatoil andgasexploration
Well cuttings of varied intervalswere washed and scannedunder
wellsdrilledby Seville-TridentCorp.nearDeming,New Mexico,from 1981 a binocularmicroscope.The selectedintervalsdependedon the colto 1983arereported.Thickness
of upperTertiary-Quaternary
basinfill southin the cuttings,
eastof Demingis interpretedto be about4,000ft. Basin-fillsedimentsoverlie lectionintervalsavailable,types of lithologiespresent
about5,000ft of Miocene-Oligocene
volcaniclastic
rocksand ash-flowtuffs. and bracketingdistinctive changesin lithologies.Eighty-fivepetroTheMiocene-Oligocene
rocksoverlieup to 3,600ft of RubioPeakFormation
(Eocene),
which is intrudedby a fine-crystalline
quartzmonzoniteTheNo.
2 City of Demingwell was drilled to a depth of 12,385ft and bottomedin
o/
RubioPeakFormation.
o^
The No. 1 McSherrywell wasdrilledto a depthof
-1
tttl,
12,495ft, but cuttingsareavailableonly to 12,430ft. About300ft of probable
2r-A
Paleocene
LoboFormationis interpretedbeneaththe RubioPeakFormation
andaboveabout570ft of Precambrian
metamorphic
rocks.TheNo. I Hurt
:: Hill
z
Ranchwell, westof Deming,is reportedto have6eendrilledto a totaldepth
,. tof 7,723ft. About 2,300ft of basinfill, 4,800ft of Tertiaryvolcanicroiks
\1,
intrudedby rhyolite of Red Mountain,and M0 ft of El Paio Dolomiteare
represented
in the cuttings(deepestcuttingsstudiedwerefrom 7,640ft).
Silve
Introduction
Seville-Trident Corp., of Carlsbad, California, drilled five wildcat
oil and gas exploration wells in central Luna County from 198Lto
1983(Fig. 1.).All were completedas dry holes and no shows of oil
Big Eurro
Mfs
Mrs
j
'lr
,.=
t,,i.
/S.{fii|
X.{r,o.*'"""",-2
f+'$.
,,,,,,,..,.,,,.s
l)t
i
x' z
>)lKI e,2;
Ronch
;>,"'?
oo
V l c t o r i o M t s" H
u.r.t 7 , 7 2 3
n)
ittle Florido Mfs
S r o f eP o r k
S i
?,,,nS-Florido Mts
:"i,1,9.q,
'.,.
"4,,.L/,
'',trtttr,,
"rir|.
oto20
ro
o
Hochito
?o
30k
o l um b u s
Burro uplift.
D e mi n g
Airporl
T23S
T24S
5
Nol
M c S h e rr y
l
Peak Formation. Third, faults are difficult to detect in the thick,
variedlithology,volcanicsections.Fourth, cavingsof uphole material
during drilling appearto have beencommon and often are abundant
Dt2,430
TD 12,385
c
--D
r\.0
|
S-el w
o
g
e
d
i
s
p
o
s
o
l
---z-ro I
i l y o f D e m i n gj
FIGURE l-Index maps, showing locations of five Seville-Trident wells
and the surrounding irea. The blue rectangle in the top map represents
the approximate location of the more detailed bottom map.
Neu Mexia Geology February 7986
$aphic thin sectionswere prepared from No.
1 City of Deming well cuttings, 138were prepared from No. 2 City of Deming well cuttings,110werepreparedfrom No. 1 McSherry
well cuttings, and 55 were prepared from
No. 1 Hurt Ranch well cuttings. Petrographicanalysesof the thin sectionsincluded
identificationof rock types and point counting 100grainson eachslide. (Photocopiesof
all grain countsare availablefrom the author
upon written request.)It was not considered
significantto count more grains becauseof
the varied interbedded lithologies and the
apparentabundanceof caved material.
Cuttings were collectedby the operator
from the No. 1 City of Deming well at 5-ft
intervalsbetween 800and 4,225 ft. Cuttings
from the No. 2 City of Deming well were
collected bv the operator at 10-ft intervals
between 4,-000and 72,385 ft. Cuttings from
the No. I McSherry well were borrowid from
the New Mexico Bureau of Mines and Mineral Resources and are in envelopes of 30-ft
intervals between depths of 1,200 and 12,430
ft. Lithologies of these cuttings were compared with the gamma-ray and neutron-density logs to verify lithologic changes and to
further correlate the dominantly volcanic
lithologies with the wire-line logs. Cuttings
from the No. 1 Hurt Ranch well were collected at 10-ft intervals between 400 and 7,640
ft. Reported total depth is 7,723 ft, but because of lost circulation, no cuttings are
available below 7,640 ft
EAST
WEST
No.I
Hurf Ronch
sec. 8, T24S, RIOW
660 FNL, 1,980 FWL
elev. 4,4O7 tl
b o s in
fitl
No. 2
City of Deming
sec. 6, T24S, R8W
1.650 FS a EL
elev. 4.282 ll
_ 2.700
4.225
4.O80
4,500
rhyolile
of
Red Mtn.
7.723
,o80
S6o level
:T;
Mi o c e n e Oligocene
volconrcs
{u5-io-PioTo , o v u
^-fm.*
7,200
El Poso Fm
bosin
titl
bosrn
fill
oosrn
fitl
MioceneO li g o c e n e
volconics
N o .I
McSherry
sec. 4, T24S, RBW
1,980 FS A WL
elev. 4,255 ft
1 . 5m i
u-5 ml
ll mi
2,200
_r\o_li!e
N o .I
CilY of Dcming
sec. 6, T24S, R8W
6 60 FS&EL
elev 4,275 tl
wilh some
-1 oi
m o n zo n r l e
inlrusive
Rubio )eok Fm.
RubioPeok
Fm.
ond
monzonile
intrusive
M i o c e ne Oligocene
v o I c o n rc s
ol^
3l1o 3
l-
8,700
9,O5O
9,ooo
Rubio peok Fm.
:t
,340
m o nz o n i l e
inlrusive
10.900
lubio Peo
Fm
Lobo Fm.
monzonile
rrecombrior
IJ
ll
ll
l2,495
Petrography
FIGURE 2-Interpreted
Preliminary scanning of cuttings under the
binocular microscope and petrographic examination of about 50 thin sections indicated
that 10 constituent litholoeies could be recognized consistently with relative ease and
certainty. Constituents in fine-sized cuttings
are counted as individual grains even though
they may be parts of larger rock fragments.
For example, fine cuttings of a volcanic arenite composed of medium (or larger) sand
grains can yield silt to fine-sand-sized fragments of andesite, rhyolite, ash-flow tuff,
carbonate (cement), and mudstone (matrix)
composition. Cuttings of ash-flow tuffs contain individual crystal fragments of quartz,
sanidine, and plagioclase as well as tuff matrix. These and other possible associations
need to be considered when interpreting the
graphs in Figure 5. Relative percentages of
the following 10 components were determined using point counts: andesites, rhyolites, ash-flow tuffs, volcanic arenites, single
g r a i n so f q u a r t z s a n i d i n e / p l a g i o c l a s1eF i g .3 ) ,
plutonic rock fragments (Fig. 6), intrusive
rocks (excluding rhyolites and andesites),
sandstone/siltstone/mudstone, carbonate rock
fragments, and chert.
Andesites
All intermediate to mafic. aphanitic and
aphanitic-porphy ri t ic rocks a re'incl uded u nder this heading. Most of the cuttings appear
to have come from relatively unaltered volcanic and hypabyssal rocks. Intergranular,
February 1986
Nm Mexico Geology
columnar sections of the four Seville Trident wells
intersertal, pilotaxitic, and hyalopilitic textures are well represented and microporphyritic hornblende-andesites are common.
Cuttings also represent less abundant mafic
rocks containing microphenocrysts and
granules of pyroxene, olivine, and magnetite. Plagioclase laths in some pilotaxitic textures are as small as 0.002mm wide and 0.025
mm long; a few of the intergranular textures
have equant and tabular plagioclase crystals
up to 1 mm in size. Random estimates of
plagioclase compositions based on extinction angles ranged from Ab* to Ab,, with an
average of about Ab.. (calcic andesine).
Rhyolites
Included under the heading of rhyolites
are the silicic flow and intrusive rocks with
hypocrystalline,
anhedral-equigranular,
spherulitic, hyaline, and seriate textures. Most
qlrartz and feldspar crystals are less than 0.3
mm long and the average size is about 0.05
mm. Blocky oligoclase and biotite microphenocrysts are in a few cuttings; a few subhedral biotite and plagioclase(?) microlites are
about 0.02 mm. The basin-fill sediments in
No. 1 and No. 2 City of Deming and No. 1
McSherry wells, to depths of 3,400 ft, contain
grains of perlitic obsidian probably derived
from the Little Florida Mountains. Rhvolite
in the No. 1 Hurt Ranchwell (Fig.2) is consanguineous to the Red Mountain rhyolite
dome. The degree of crystalinity of the rhy-
were studied.
olite of Red Mountain increases with depth
from cryptocrystalline-aphanitic at the surface to holocrystalline-aphanitic texture resembling a microgranite in the deepest
cuttings (Fig. 7).
Some rhyolite and chert cuttings are difficult to differentiate. Thin sections of known
rhyolites and cherts from mountains in and
around the Mimbres Basin show that generally the cherts are anhedral-equigranular
and typically contain minor amounts of calcite. The rhyolites are less commonly equigranular and typically contain microlites and
crystallites. Some small cuttings of devitrified shard-free matrix from ash-flow tuffs may
be indistinguishable from rhyolites.
Ash-flow tuffs
Ash-flow-tuff cuttings were derived mostly
from vitric and vitric-crystal ash-flow tuffs
similar to those exposed in the Little Florida,
Tres Hermanas, and Grandmother Mountains; Cooke's, Cedar Mountain, and Black
Ranges; and Klondike and Carrizalillo Hills
(Clemons, 1982a,b; Elston, 1957;licha, 1954;
Thorman and Drewes, 1,979). Quartz, sanidine, plagioclase, and biotite crystal fragments (averaging <0.5 mm) are contained in
a cryptocrystalline and hyaline matrix. The
majority of ash-flow-tuff cuttings contain
cuspate and platy, axiolitic shards and pumice shards, but ash-flow-tuff cuttings without
shards also are common. Devitrified bands
in these shard-free tuffs closely resemble intrusive and flow rhyolites.
grained sandstonesand conglomeraticvolcaniclasticrocks.They are composedof varying proportions of basalt, andesite, latite,
dacite,rhyolite, and ash-flow-tuffrock fragVolcanic arenites
mentsalong with abundantplagioclasecrysThe volcanic arenites are fine- to coarse- tal fragments.The matrix is typically clay rich
FIGURE 3-Photomicrograph of rounded grains of quartz (Q), sanidine (S),
Plagioclase(P), and varied volcanic rocks (v) from 4,040-ft depth in No. 2
City of Deming well Crossednicols;width of field is 3.5 mm.-
A
g
4,ooo
20
Percenl
40 60 80
Percenl
with abundant iron oxides; epidote and
chlorite mav be present. These arenitesare
generally cemenied with calcite but a few
containmicrocrystallinequartz cement.Cuttings from these rocks appear more altered
than cuttings from volcanic intrusives and
FIGURE4-Photomicrograph of intrusive consisting of sericitized plagioclase
(P), quartz (Q), and chlo"rite(C) from 10,100-ftdeptf, in No. 2 City'of beming
well.^Crossednicols;width of field is 13 mm
Percenf
Percent
Percenl
Percenl
5,OOO
6,OOO
zooo
8,OOO
o(D
o
9,OOO
ro,ooo
A n d e s ief
Rh y o ilt e
A s h - f lo w
il,ooo
Volconic
orenile
t2,ooo
B
Intrusive
Q u o r lz /
sonidine/
p l og i o c l o s e
P er c e nI
20 40
4,OOO?
60
Percent
20 40
Percent
Percent
Percenl
Percent
.U
5,OOO
6,OOO
7,OOO
3
8,OOO
o
q)
o
trusive
9,OOO
ro,ooo
il,ooo
A n d e s ti e
Rhyolite
Ash-flow tuff
Q u o r l z/
sonidine/
plogioclose
Volconic
orenile
t2,ooo
FIGURES-Percentagedistribution graphs of the compositionof cuttings in the No. 1 McSherry well (A) and the No 2 City of Deming well (B).
Nm Mexico Geology Februaty 7986
ously describedin the Mimbres River drainage
by Clemons(1982a,b,1984,in press),Elston
(1957),Jicha(1954),and Thorman and Drewes
(t979).
of the Miocene-Oligocenevolcanic sequence
(underlying basin fill) is placed at 4,080 ft.
The No. 1 McSherry well penetratedan andesite flow or intrusive between 4,080 and
4,150 ft (Fig. 5A). Abundant well-rounded
grainsare in cuttingsfrom above4,080ft and
Pre-basin-and-rangesurface
angular varied{ithology grains are in cutCentral Luna County was mostly, if not tings from below 4,150ft; therefore,the top
completely,surfacedby Tertiary volcanicrocks of the Miocene-Oligocenevolcanicsequence
at the onset of basin-and-rangedeformation is placed at 4,080ft. The No. 1 Hurt Ranch
about 20 m.y. ago. Eocenevolcanism had well penetratedintrusive rhyolite at a depth
probablyburied all older rocks exposeddur- of 2.300 ft. The cuttinss between 800- and
ing the Laramide orogeny. Examplesof the 2,300-ft depths are chiefly reddish-brown,
Eocenevolcanicrocks are now well exposed calcareousmudstone and siltstonewith mi(encircling the Mimbres Basin) in the Victo- nor amounts of dolomite and volcanic rock
rio, Grandmother,Good Sight, Florida, and fragments.Theserocks are interpretedto be
Tres HermanasMountains as well as in the Upper Tertiary basin fill rather than Lobo
CedarMountain, Cooke's, and Black Ranges. Formation (S.Thompson, III, written comm./
Ash-flow tuffs from dominantly Oligocene April 1984).The fine-grainedclasticrocksare
eruptionsprobablyblanketedthe areaby early underlainby volcanicrocksresemblingthose
Miocenetime (23.7m.y.ago).Theseash-flow cropping out in the Victorio and Grandtuffs crop out sporadically in the Big Burro, mother Mountains to the west and the Rubio
Grandmother,Little Florida, and Tres Her- PeakFormationto the eastand north. Theremanas Mountains and in the Cedar Moun- fore, the thickness of post-Oligocene basin
tain, Cooke's, and Black Ranges.The ash- fill north of Red Mountain is estimatedto be
flow-tuff terrane was dotted with a few rhy- 2,300 ft.
olite flows and basaltic andesite vents and
The abundance of rhyolite cuttings from
flows in latest Oligocene to early Miocene the No. L McSherry well between 3,250and
time (26-23 m.y. ago). The rhyolites include 4,080ft and in the No. 2 City of Deming well
those in the Little Florida Mountains, along at about 4,080 ft probably indicates initial
the Mimbres Valley north of Faywood Hot faultingand subsequent
eiosionof the Little
Springs, and probably the rhyolites in the Florida Mountains rhyolites. Rhyolite cutVictorio Mountains and Red Mountain. Ba- tings remain an important constituentin the
saltic andesitesin southern Cooke's Range, No. 1 City of Deming well to a depth of 2,700
BlackMountain, and southeastLittle Florida ft, which probably representscontinued uplift
Mountains are penecontemporaneouswith on the basin-boundingfaults. Perlitic obsithe rhyolites (2623m.y. old). As the Mimbres dian, identicalto the perlitic obsidianat Rock
Basinsubsidedalong basin-and-rangefaults, Hound StatePark in the Little Florida Mounthe Eocene-to Miocene-agevolcanic rocks tains,is commonin the cuttingsof No. 1 City
provided most of the basin-fill materials.
of Deming and No. 1 McSherry wells to
depths of 3,400ft.
Basin fill
The thicknessof basin-fill sedimentseast
Miocene-Oligocenevolcanic sequence
of Deming is probably about 4,000 ft. The
Ash-flow tuffs are interbedded with volboundary between bedrock and overlying
sedimentsdepositedwith the onsetof basin- caniclasticrocks, andesites, and latites to
and-range deformation in Luna County is depths of 9,000ft in the McSherry well and
difficult to place both in the cuttings and on to depths of 8,700 ft in the No. 2 City of
the wire-line logs of the McSherry well. The Demiirg well. Ages of ash-flow tuffs detersedimentswere derived from rocks in sur- mined on samplesfrom nearby areasrange
rounding rangesthat are similar or identical from 29 to 36 m.y., so this 4,600-4,900-ttseto those rocks that make up the floor of the quence,enclosingthe ash-flow tuffs, is consubsidingbasin.Consequently,lithologiesof sideredto be mostly Oligocenein age. The
cuttings do not change significantly from upper beds may be early Miocene and the
above to below the basin floor. Generallv.the basalbeds may be late Eocene.
The hypabyssalrock intrudes the Rubio
cuttings of basin-fill sedimentscontain gieater
percentages
of well-roundedgrains.Possibly Peak Formation (Eocene)in the McSherry
the basin fill at the McSherrv well is onlv well and the central part of the Oligocen-e
3,t60 ft, as indicated by Sam ihompson, IiI volcanic section in the No. 2 City of Deming
well. Therefore,the age of the fine-crystal(written comm./ May 1983).
The No. 1 City of Deming well may have Iine quartz monzonite postdates early Oligopenetratedthe basin floor at 3,900-ftdepth. ceneand may be as young as early Miocene.
Percentagesof ash-flow tuffs are much greater
below 3,900 ft, but lithologies are quite variable to a total depth of 4,225 ft. If the ash- Rubio Peak Formation
flow-tuff cuttings were derived from in situ
The No. 2 Clty ol Deming well cut Rubio
ash-flow tuffs, it seemsthat they should pre- PeakFormation(Eocene)and hypabyssalinvail for 10's or 100'sof feet. The No. 2 City trusive rocks from 8,700 to 1,2,385ft. The inof Deming well cut dominantly ash-flowtuffs trusive provided most of the cuttings from
between 4,080and 4,400ft and intermittently
9,000-to 10,900-ftdepths (Fig. 5B). Below
at greaterdepths (Fig.5B).Therefore,the top 10,900ft the cuttings are distinctly Rubio Peak
type (andesiticvolcanic arenitesand calcareous, altered siltstone) to a total depth of
1,2,385ft. The No. 1 McSherry well-peneft,
trated similar rocks from 9,000to 1,1,,830
exceptfor the 300-ftinterval between11,300and 11,600-ftdepths (Fig.5A). Cuttings from
this 300-ft section may represent the Lobo
Formation (Paleocene).Lithology of these
cuttings resembles,but is not identical to,
the Lobo in the Florida Mountains. Unfortunately, 230 ft of hypabyssal intrusive between the Lobo(?) and the Precambrian
metamorphicrocksat 11,830-ftdepth (Fig.2)
occupy the interval that might include the
basalconglomeratesof the Lobo Formation.
The Lobo is assumedto be absentin the Hurt
Ranchwell because600ft of volcanicarenites
overlie El PasoDolomite. Thesevolcanic arenitescloselyresemblebasalRubio Peakrocks
that rest on the Hell-to-Finish Formation
(Lower Cretaceous)in the Victorio Mountains (Greg Mack, pers. comm. 1984).
Pre-Tertiary rocks
As expected,the older subsurfacestratigraphy of the wells reflects the stratigraphic
relations observedin the Florida, Victorio,
and Big Burro Mountains. That is, the northwest-trending BurreFlorida uplift Elston,
1958) was segmented by basin-and-range
faulting and underlies the Mimbres Basin between the Florida and Big Burro Mountains.
No Mesozoicor Paleozoicrocks were penetrated by the wells studied, except the El
Paso Formation (Lower Ordovician) in the
bottom of the No. 1 Hurt Ranch well.
Precambriangneiss,schist,hornfels(?),and
somemicrocline-bearinggranite were drilled
below 11,830ft in the McSherry well. Rubio
Peak Formation is the oldest rock that was
drilled in the No. 2 City of Deming well, at
a depth of 12,285ft, about l..7 mi west of the
McSherrywell (Fig. 1). Thus, there is a minimum of 555ft of relief (855ft if 300ft of Lobo
Formation is assumedto be present at both
Iocales)on top of the Precambrianbetween
the two wells. This may be due to faulting
but could just as conceivablybe due to an
erosionaltopographydevelopedon the Lobo
and Precambrianrocks in post-Laramide and
pre-RubioPeak time.
ACKNOWLEDGMENTS-I
thANK
FTANK E.
Kottlowski, Director, and the New Mexico
Bureau of Mines and Mineral Resources
(NMBMMR) especially for financial assistanceduring this project and for continuous
support of my geologicalinvestigations in
southwestern New Mexico. I thank Rudy
Greenbaum, President of Seville-Trident
Corp., for providing the well cuttings and
wire-line logs for study. I am grateful also to
Robert Biebermanand Sam Thompson, III,
NMBMMR, for assistancein the core and
cuttings library and discussionsrelating to
interpretationsof the cuttings and logs. Robert Cooper and PaulaNewcomer were very
helpful in washing the well cuttings and
making petrographic thin sections. The
manuscript was improved by thorough recontinued
onpage11
New Mexico Geology February 7985
Number of spec, on
slide or in container
thompsonin. sp
Schwagerina
2 (vial)
1 (slide)
2 (slide)
2 (slide)
P 32 000 Hueco ls near Hueco
P 32 9
Tanks, El PasoCo , Tex
P3210
P3277
Triticitescuchilloensis
n sp
2 (slide)
P 25 7
2 (slide)
P262
2 in vial
P3 0
4 (slide)
1 (slide)
2 (slide)
2 (slide)
P31
P 3.2
P33
P34
2 (slide)
P8 1
2 (slide)
1 (slide)
2 (slide)
P82
P 8.3
P84
6 (vial)
P 11.0
2 (slide)
3 (slide)
P't't 2
P 1.1.4
2 (slide)
1 (slide)
2 (slide)
2 (slide)
^1
P 21
P272
P273
Triticitesfresrulensisn sp.
Triticitesgallowayin. sp
Triticitesjemezensisn sp
Triticiteskellymsisn. sp
Triticitesrhodesin sp
,:'
Triticitesoentricosus
v at.
sacramentoensts
n vat,
Da1
1 (box)
10!ii2';' '' .
1 (slide)
1 (slide)
lOfrzZlu
b , '
1_orlz
l
rmritaeu,,,
,,
10rrrr4 ',',
2 (vial)
1 (slide)
2 (slide)
Triticiteswellsi n sp
.
:
'
10!1]11c
&;e,, ,,
Top of Magdalena fm
FresnalCanyon, Otero Co,
New Mexico
U Magdalena fm La Luz
Canyon, Otero Co , N M
Top Magdalenafm
JemezSprings, N Mex
Upper Magdalena; Kelly, N M.
n
P 31 0
Upper Magdalena, Rhodes
Canyon, Socono Co., N M
P31 1
P313
Up. Magdalena,
Co , N Mexico
La Luz, Otero
P52
P5 3
1 0 1 1 1 4 ' q & e , ,P 23 1
1 (slide)
1 (slide)
2 (slide)
1011-14
,
f
101114,b
1 0 1 1 , 1 4 a & d-
Magdalena fm Barton, Santa
Fe County, New Mexico
P232
P233
P 23.4
Collectols
Wedekinl elli nn excent r ica
Triticites nebraskensis
Tri t icites re ntr icosus
number
P382,P39 2
P 482
P 37 1.,P 37.2
P 1 50 , P 1 5 . 2
P762
P 37 7, P 37.2,
P227
P 22 3, P 22.4,P 22 6,
P 22.7
P 33.3
Triticitesbllymsis
Triticitessp A
Triticites rhodesi
P93,
P20,P2.1.,P24
P 11.0P
, 11.8
P 20.3
P 31..2
Schwagrina emaciata
P1.000,P123
Schwageri na huecoen sis
P327,P328
Pseudoschwagei tu t'usuIi noides
P 32.0, P 32 4,
P325,P326
P 32 00, P 32.1.,P 32 2
P 13.0,P 1.3.1.,
P 73 2,
P 1 3 . 3 ,P 1 3 . 4
Pseudoschwagerina
ud.deni
Polydiexodirc g uadalupensis
continued
frompage9
views and suggestionsby Sam Thompson,
III, and Roy Foster.
References
TABLE 2-Specimens that were illustrated in Bulletin 14 that are still lost.
(?)
Staffellaatolcensis
Oznwainellasp
Fusulinaeuryteines
Fusulinapattoni
Fusulinnsoconoensis
Wedekindellinau thysepta
Reference
Needham, C. E , 1937, Some New Mexico Fusulinidae:
New Meico Bureau of Mines and Mineral Resources.
Bulletin 14, 88 pp
n
P5 0
2 (slide)
'
Middle Magdalena
Cuchillo Mts. Siena Co ,
New Mexico
Mountains, as //cotypes"of the new species
(p. 36). P 21..3,P 2r.4, P. 11.00,and P 11.8,
all of which were illustrated in Bulletin 14,
were found at a locality near Jemez Springs
in the JemezMountains. However, P 11.00
and P 11.8were not sent to the U.S. National
Museum (Table2).
Cotypes of Triticitesrhodesiarc listed in Bulletin 14 (p. 45) as including numbers P 31.0,
P 31.1, P 3-1,.2,
and P 31.3; however, Needham only sent P 31.0, P 31,.'1,,
and P 31.3 to
the USNM.
Polydiexodina
guadalupensis
was a new speciesdescribedin Bulletin 14 (pp. 58-59)with
cot)?eslisted as P 13.0,P 13.1,P t3.2, P 13.3,
and P 13.4. P 13.0,P 13.3,and P 13.4were
illustratedin the text. However, none of these
specimensare shown on Needham's list to
Henbest (Table1).
The rediscoveryof a portion of Needham's
fusulinid collections is encouraging. We are
very grateful to F. J. Collier for his efforts to
locate the U.S. National Museum holdings
and for providing copies of related correspondence.It is not impossiblethat the remaining specimens are in collections
elsewhereand may yet be retrieved. We urge
any readersof this article with knowledge of
Needham'scollectionsto contactus.
Source
Lower Magdalena Fm , Kingston, NM
Valle de Ojo de la Parida, Socono Co., NM
Sangre de Cristo Mts ; 15-20 mi east of Taos, NM
Hemosa Fm., Archuleta Co . CO
Lower Magdalena Fm, Socono Mts., Wand, NM
Montezuma Hot Springs, San Miguel Co , NM
Tijeras Canyon, east of Albuquerque, NM
Tijeras Canyon
North end of Siena Los Pinos. 6 mi southeast of
Scholle, Socono Co., NM
Cedro Canyon, Manzano Mts
Alamogordo, NM
Jemez Springs in Jemez Mts , NM
Coyote Hills, Socono Co , NM
Upper Magdalena Fm , Rhodes Canyon, Socono
Co, NM
|arilla Mts , about 4 mi north of Orogrande, Otero
Co, NM
About 2 mi northeast of Hueco Tanks, El Paso Co .
TX
Near Hueco Tanks, El Paso Co , TX
Near Hueco Tanks, El Paso Co , TX
Guadaltrpe Point, TX
Clemons, R. E., 1982a,Geology of Florida Gap quadrangle, Luna County, New Mexico: New Mexico Bureau
of Mines and Mineral Resources,Geologic Map 52
Clemons, R E ,1982b, Geology of MassacrePeak quadrangle,Luna County, New Mexico:New Mexico Bureau
of Mines and Mineral Resources,Geologic Map 51.
Clemons, R. E, 1984, Geology of Capitol Dome quadrangle, Luna County, New Mexico: New Metco Bureau
of Mines and Mineral Resources,Geologic Map 56.
Clemons,R. E., 1985,Geology of South Peakquadrangle,
Luna County, New Mexico: New Mexico Bureau of Mines
and Mineral Resources,GeologicMap 59, scale1:24,000
Clemons, R. E , in press, Geology of the Florida Mountains, southwest New Mexico: New Mexico Bureau of
Mines and Mineral Resources,Memoir 43, in press.
C l e m o n sR
, E, andBrown,G A, lg%,GeologyofGym
Peak quadrangle, Luna County, New Mexico: New
Mexico Bureau of Mines and Mineral Resources,Geologic Map 58, scale 1:24,000
Elston, W 8., 1957, Geology and mineral resources of
Dwyer quadrangle, Grant, Luna, and Sierra Counties,
New Mexico:New Mexico Bureauof Mines and Mineral
Resources,Bulletin 38, 86 pp
Elston, W E , 1958, Buno uplift, northeastern limit of
sedimentary basin of southwestern New Mexico and
southeasternArizona: American Association of Petroleum Geologists, Bulletin, v 42, pp 251,32517
Jicha,H. L., 1954,Geology and mineral deposits of Lake
Valley quadrangle, Grant, Luna, and Sierra Counties,
New Mexico:New Mexico Bureauof Mines and Mineral
Resources,Bulletin 37, 93 pp
Thoman, C H , and Drewes, H , 1,979,Geologic map of
parts of the Grandmother Mountain East and Grandmother Mountain West quadrangles, Luna County, New
Mexico: U.S. Geological Suruey, Miscellaneous Field
Studies Map MF-1088, scale 1:24,000.
!
Nrro Mexico Geology February 1986
11