Geologic Map of the Las Vegas NW Quadrangle, San Miguel County

NMBGMR Open-file Geologic Map 78 NEW MEXICO BUREAU OF GEOLOGY AND MINERAL RESOURCES A DIVISION OF NEW MEXICO INSTITUTE OF MINING AND TECHNOLOGY Last Modified May 2012 Igneous Rocks Upper shale memberȯ ¢ȱ ǯȱ ȱ ȱ ȱ ȱ ȱ 105°15'0"W 35°37'30"N 105°12'30"W 105°10'0"W 35°37'30"N Dike (Pliocene?)—Ȭǰȱ ęȬǰȱ ȬǱȱ Kcu 000 000 000 000 Ti section contains four bands of gray septarian limestone

478 479 480 481 482000 483000 484000 485000 486000 487000 488000 ¢ȱ ǯȱ ȱ ȱ Ȭȱ Ǳȱ ȱ ȱ

000 ! Kcj 000 ǯȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ

3956 Qca ! QTg 3956

Qt2 ! Unconformity ǯȱȱȱȬȱȱǻśǼȱ¡ȱ ȱ ȱ ȱ-

! Qt2

Qa Kcj ! Kcu

Knl ! B'

Knl Kcl ! ¢ǯȱȱȱȱŗŜǯŝȱȱǻśśȱǼǯ ! Knl ! Kcj Disconformity ȱȱȱ ȱǯȱȱȱǯŗśȘ

! Kns ! Kcl Kn af Pb Greenhorn Limestone ǻȱ Ǽȯȱ ȱ ȱ Knl Qt2 Knl Sedimentary Rocks Kg Qca dark-gray, argillaceous micrite and medium- to dark-gray calcareous Qca Qa Disconformity QTg Kcj Anthropogenic deposits (modern)—These constructed deposits comprise ǯȱȱȱȱȱ¢ȱȱȱŖǯŚśȱȱǻŗǯśȱǼȱǯȱȱȬ¢ȱ Qc af Holocene Qp/Qe Pg ȱȱȱȱȱȱȱęǯȱ ȱȱȱȱǯȱȱ ȱȱ ȱȱȱǯȱȱȱ Kcu Permian Kcl Qt1 rock weathers into rectangular blocks and plates due to well-developed Qa Knl Kc Cretaceous Py

3955000 6 3955000 Quaternary Deposits ȱȱ¡¢ȱȱȱǯȱȱȱȱȱ Ä Kcc

o Kg Quaternary ȱȱȱŗŚǯŞȱȱǻŚşȱǼǯȱȱȱȱ Kg 3 o Qt2 Psc Kcl Alluvium—Mud, sand and gravel along stream courses which is moved by Qa Qc Qa *m ȱȱĚ ȱȱȱȱǯȱ Codell Sandstone member—Light-olive-gray, rusty-brown- Pleistocene Kcc Knl Kcu Qc Qt3 Kg ǰȱȱȱȱȱȱęȬȱȬȱ Qa

QTg 4 QTa/ *s ĵȱǯȱȱȱȱȱȱȱȱ ȱȱ o Penn. Kcu QTg Kgr Holocene alluvial deposits—This unit is a composite of alluvium and Pliocene Qca ȱ ȱ ȱ ȱ ǯȱ ȱ ȱ ȱ ǯȱ ȱ ȱ Unconformity ǯȱ ȱ ȱ ȱ ¢ȱ ȱ ǰȱ ǰȱ ȱ ȱ ¢ȱ Ti Kd ¢ȱ ¢Ĵȱ ȱ ȱ ȱ ǻĵȱ ȱ Ȃǰȱ Mesozoic Miocene Paleozoic Ma ȱ ȱ ȱ ȱ ȱ Ě ǯȱ ȱ ȱ ȱ ȱ ȱ ŗşŞŜǼȱȱ£ȱȱ¢ȱȱȱȱśǰȱŞȱȱŗŜǰŝȱ Miss. 3954000 3954000 ȱǻŗŜǰȱŘŝȱȱśśȱǼȱȱǯȱȱȱȱŗŞǯŞȱȱǻŜŘȱǼǯȱȱ Qpl Qpl Unconformity ȱ¢ȱęȱǰȱ¢ȱȱȱȱȱȱȱǰȱ¢ǰȱ

Cenozoic ȱĚȱǯȱȱȱ¡ȱȱ ȱȱȱȱ Oligocene Jm Dev. Not Exposed ǯȱȱ QTg Qpl Lower shale memberȯ ¢ȱȱȬ¢ȱǯȱȱȱȱ Jt Kcl Knl Knl Silur. Eolian deposits—Fine-grained, wind-blown sand and silt along the east- ȱȱȱ ȱȱ ȱȱȱǯȱ Qt2 Tertiary Nonconformity Qe Unconformity Jurassic ȱĚȱȱ¢ǯȱȱ QTg Je ȱȱȱŜŗȱȱǻŘŖŖȱǼǰȱȱȱȱǯȱ Knl Eocene Ord. Qp Not Exposed Knl Knl Kcl Unconformity Playa/Lacustrine deposits—ȱ ȱ ęȬȱ ȱ ȱ ȱ Ěȱ ȱ Graneros Shale (Upper Cretaceous)—ȱ¢ǰȱęȱȱȱ Qt1 Qca Kgr Qt2 af Qpl 000 Qca 000 Ȭ¢ȱ ¢ȱ ¢ȱ ǯȱ ȱ ȱ ȱ ȱ ǰȱ ȱ subordinate amounts of thin, platy sandstone and siltstone beds (Skotniki,

3953 Qca 3953 Camb. Qp ^c Qa Qp Paleocene ȱȱȱȱȱȱȱȱ ǯȱ ŘŖŖřǼǯȱȱȱȱȱŚŘȱȱǻŗŚŖȱǼȱȱȱȱǯȱȱ¢ȱȱ Kcj Kcl ^s ȱ ȱ ȱ ȱ ȱ ȱ ¡ȱ ȱ ȱ ȱ ȱ ȱ ȱ riassic p_ T ǯȱȱ Knl Qpl Qca 6 Precam. Colluvium—Dark-gray silt and clay deposits lying on the Greenhorn

Qt3 3 Qpl Disconformity Qc

Qpl o o ȱȱȱǯȱȱ¢ȱȱ¢ȱ ȱȱȱ¢-

% Knl Subsurface Units Qt1 Knl ( Qe? Knl ȱȱǯȱȱ 2 o Qt3 ȱ ȱȱȱȱȱĵȱȱȂȱǻŗşŞŜǼǰȱĵȱǻŗşŝŘǼȱ Qp 4

o Pediment gravel—Reworked gravel, sand, and silt from older terrace ȱ ȱ ǻŘŖŖřǼǯȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ Qp

3952000 Kcj 3952000 ǯȱȱȱȱ¢ȱȱȱȱĵǯȱȱ ȱ¡ȱȱ ȱȱȱǯȱ % ( ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !

4 Ä Kcj o Map Symbols

Qt1 Kg

! Dakota Sandstone (Lower? and Upper Cretaceous)—Ǳȱ ȱ ȱ

! Kcj

! Terrace Deposits

! 3

! ! Kd Qca Â

Ä A A'

! o

! !

3 ! Qca

! 4 3 ǰȱ ęȬȱ ȱ Ȭǰȱ Ȭȱ ȱ ȱ ȱ

! o !

! Qt3 ! !

o o !

! 6

! M

! ȱ ¢ȱ ȱ ¢ȱ ¢ȱ ǯȱ Ǳȱ ¢ȱ ǰȱ ¢ȱ

! 4 !

! Kcu o

! Geologic Cross Section Subrounded to well-rounded, moderately sorted clasts similar to those in

! 35°42'30"N !

! o 35°42'30"N Qt1 Qt3 ȱȱȱȱǯȱ Ǳȱǰȱ¢ȱ

Qt3 6 Qca ȱȱǯ

Qt2 ! o Qpl Â ȱ ȱ ǰȱ Ȭȱ ȱ Ȭȱ ǯȱ ȱ ȱ Knl Â Kcc ! ȱ¡¢ȱŚśȱȱǻŗŚşȱǼǯȱȱ

! Qca !

Knl ! 3 !

! Middle Pleistocene(?) stream terrace—ȱĚȱȱȱȱşȬŗŘȱȱ

! ! Qp ! ! ! ! ! !

3 o ! ! Qt1

000 ! ! 000 Contact: ȱ ȱǰȱĴȱ ȱǯ 3951 5 ! 3951 !

o! Kcj !

3 ! ǻřŖȬȱŚŖȱǼȱȱ¢ȱĚǯ ! !

Qpl !

! !

! ! Morrison Formation (Upper Jurassic)—Ǳȱ ȱȬ¢ȱ

! ! o

Ä !

! 5 Kcl ! !

o ! ! ! Ä Jm

! !

Knl ! !

! !

! ! ! ǰȱ ǰȱ ȱ ǼǱȱ ȱ ȬȬȱ ěȱ ȱ ȱ ǰȱ ęȬȱ ȱ !

! ! ! ! ! Qt3 ! ! ! o !

! !

! ! ! !

! : !

! Fault: ȱ ȱǰȱĴȱ ȱǯȱ

Kcj ! ! ! Kcl ! !

! ! ¡¢ȱřŖȱȱǻŗŖŖǼȱȱȱ ! Middle Pleistocene(?) stream terrace—

! Ȭȱȱȱȱǰȱǰȱȱ¢ȱǱȱ !

Qt1 2 !

Qp !

! !

! Qt2

Knl o ! o !

! F 2 ! Qc Ä

! ! Knl ! ȱ¢ǯȱ

! W 6 Lower -- Thin-bedded red, green, purple and brown mudstone and !

o !

! Qp !

! 7

Kcj !

Ä ! ! 2 S

! o ęȬȱȱǻ ǼǯȱȱȱȱŗřŞȱȱǻŚśŖȱǼȱȱȱȱȱ !

! ! !

Qca Knl !

! Anticline and Syncline: Trace of axial plane showing plunge

! o

Knl Qpl !

! M

! ! ! 4

Kcj 3 ! ȱȱȱ ȱȱȱǯȱȱ !

! ! 5 o

! Early Pleistocene(?) stream terrace—Gently southward-sloping basal con-

Qp o ! direction; dashed where approximately located. ! 3 ! Kg Qt3

! o S

Qt1 !

Qt3 ! ȱ ¡¢ȱ řŖȱ ȱ ǻŗŞŖȱ Ǽȱ ȱ ȱ¢ǯȱ ȱ ȱ ¢ȱ

Knl %

% %

! o % %

% !

! % %%%% %

% % % %% % %% % % % % %% %% % ! % %% %% %% % % % % % %% o % % % % % % % %% % % % %

%% %% %% % % % % % % % %% %% %% % % % %

% Todilto Limestone (Upper Jurassic)—Gray bituminous, slightly sandy, % % % %% %

%% % %% % % % % ! % %%

% % %

! % ! 5

000 %%%%% 000 ȱȱȬĚ ȱȱȱȱȱ ȱȱȱ-

3950 ! 3950 ! Jt

Knl J !

! o Ä 4 ¢ȱ ¢ȱ ǲȱ ¢ȱ ȱ ȱ ȱ ȱ ǯȱ

! 3 !

! Kcj Kcl 5 5 ! Ä ȱȱȱȱȱȱǯȱȱ

Qp !

Qt1 ! A !

F ! A'

! 60 !

! o o !

! ȱȱęȱȱ¢ȱǯȱȱȱŖȱȱŝǯŜȱȱǻŘśȱǼǯȱ

! Kcj 8 Dip and strike of bedding.

! ! o W J 4 Kcj ! Â !

! 20 Kcu o !

9 o ! o Quaternary or Tertiary

Qt1 ! Kcj Kg !

! 3o o 5 4 5 oo Kcc Entrada Sandstone (Upper Jurassic)—ěȱ ȱ ǯȱ ¢ȱ

3 Ä 3 !

! Â ! ! o Je Knl ! o%%%%%%%%%% 50 o % % Qt2 Qp %%%% %%% !

Kcj ! %%% % ǰȱȱ¢ȱȬǯȱȱŗŞȬŘřȱȱǻŜŖȬŝśȱǼǯȱ %% !

% %%% % ! %%%% %

! %

% % %

% %

5 % !

% Kcu Dip of fault or dike. % % %

%% %

% %% %

%% %

% %

! %% ! % Alluvial fan of Sapello River (Quaternary or Tertiary)—Sand, silt, and % % % %

% %

! Kcj !

Kcc QTa Kcj !

Kcc !

! ¢ȱǰȱ Ȭȱȱȱȱȱ ȱȱȱĵǰȱ

Knl af 3 ! ! Â ! Ä

Kcj !

! !

o ! ! ęȬȱȱȬȱǰȱȱȦǰȱǰȱ

! Chinle Formation (Upper Triassic)—Ǳȱȱǰȱȱȱ ! 50 !

! !

! M ! Fault Joints: ȱȱǯ ^c !

! weakly- to moderately-foliated coarse-grained granite, coarse-grained 000 ! 000

! brown to red sandstone, and a few thin lenses of limestone and limestone 3949 ! 3949 !

Kcu !

! Kcj !

! ǰȱ ȱ Ȭȱ ȱ ĵǰȱ ȱ ȱ ȱ ! ǱȱȱȬȬȱǰȱ ǰȱȱȱȱȱȱȱȱ !

! !

Knl Qca Qt3! ! ǻǼȱǰȱ ȱǰȱȱǯȱȱȱȱȱȱşȱȱ ! ȱȱȬȱǱȱȱ ȱȬȬȱȱǰȱȱ

! ! 60

Kcj ! Kcj !

! Ä ! ȱȱȱȱĚ ȱǯ

3 !

! ǻřŖȱǼȱȱȱ¢ȱȱ¢ȱȱȱȱȱǯȱ- !

o ! Kg ! ȱǰȱȱȱ ȱȱ¢ȱȱ¢ȱȱǻ Ǽǯȱ !

Qt1 ! 3 Qp !

Kcj ! 2 Kg ȱ ȱ ŗśȬŚśȱ ȱ ǻśŖȬŗśŖȱ Ǽȱ ȱ ȱ ȱ ȱ ȱ ȱ ¡¢ȱ !

! Kg ȱřŘŖȱȱǻŗǰŖŚŖȱǼȱǯȱȱ o ! Ä o Kcj !

Qca o !

Knl F 5 ! Kg

! mined for sand and gravel along the north side of Sapello River just north Kcu !

3 Â ! 4

Kcu o ! ! ! Santa Rosa Sandstone (Upper Triassic)— ǰȱ¢ȱȱȱȱ !

4 ! ȱȱǯȱȱȱȱȱȱȱȱŘǰŖŜŖȱȱǻŜǰŞŖŖȱǼȱȱ

! o !

! ^s ! W

o !

! W ȱ ȱ ǰȱ ǰȱ ȱ ȱ ǯȱ ȱ ȱ ŜŗȬŗŘŘȱ ȱ W W 4 Ä ŘǰŗśŗȱȱǻŝǰŗŖŖȱǼȱȱȱȱǯȱ ! Kcl !

! W4 o ! Kcc Qt2 W! o M ǻŘŖŖȬŚŖŖȱǼǯȱ

! Kcl

000 ! 000 ! 3948 Ä 3948

! ! 3 ! W Alluvial fan or ancient terrace deposits of Gallina Creek (Quaternary or ! Kcj M ! !

o ! QTg ! ! Ȭȱȱȱȱȱȱ

3 Bernal Formation (Permian)— ! Qt2 ! o

Kcl ! Tertiary)—Sand, silt, and poorly sorted, well-rounded pebbles to cobbles Pb Ä ! Ä

! ! 7 ȱȱȱȱȱǯȱȱȱřśȬŚŘȱȱǻŗŗśȬŗŚŖȱǼǯȱ

! o

Kcu ! o ȱ ȱȱȱĵǰȱ¢ȬȱȱȬȱȱ-

! Kcj ! Â Kg !

! Kcc !

! Kcl 17 !

! ! Â ! ȱ ȱ ȱ ȱ ȱ ȱ ȱ Ȭȱ ȱ ĵǰȱȱ

Qt2 ! ! ! 3 !

Qt2 Qt2 ! 2

! o ! 3 ! F Kcu o ! ! ȱ ȱ ǻǼȱ ǰȱ ȱ ǰȱ ȱ ǯȱ

! ! !

o ! Glorieta Sandstone (Lower Permian)— ȱ ȱ ěȱ ĵȱ ! ! ! Kcc ! Â

Kcj ! ȱ ȱ ȱ ȱ ȱ Ŝȱ ȱ ǻŘŖȱ Ǽȱ ȱ ȱ ȱ ȱ ȱ ȱ Pg

! ! 4 ! ǯȱ ȱ ȱ ȱ ȱ ȱ ǯȱ ȱ ȱ řŖȬŝřȱ ȱ

! o 3 o 2 ! ǯȱȱȱŜŖȬŝŜȱȱǻŘŖŖȬŘśŖȱǼȱȱ ȱȱȱ ȱ !

! ǻŗŖŖȬŘŚŖȱǼǯȱ !

! Kcc o 2 ! o ! ȱȱȱȱǯȱ !

W ! 000 ! 000

! 3947 ! 3947 ! Qc

o ! !

3 ! Qca

! Kg Kg ! Yeso Formation (Lower Permian)—Ȭȱȱȱǰȱǰȱ

3 !

Storrie Lake Kcj ! !

! Py !

! Kcj o ! Cretaceous ! 35°40'0"N ! 35°40'0"N ȱȱȱȱȱ¢ȱȱȱ¢ǯȱȱȱŜŗȬŗśŖȱȱ

Kcc ! !

Qt2 !

! ! Kg !

4 ! ǻŘŖŖȬŚśŖȱǼǯȱȱ

Qa ! 3 !

! o

! Â Qca ! o Niobrara Formation (Upper Cretaceous)—Medium-gray shale and calcar- 3 Kcj ! 10 4 ! Kn !

o o ! af ȱǯȱȱĵȱȱȂȱǻŗşŞŜǼȱȱȱȱ ȱǰȱȱŞȱȱǻŘŜȱ ! o

af Kcc Kcl ! Sangre de Cristo Formation (Lower Permian)—Red, purple, and ! !

! 2 ! Psc

! ft) thick, contains shale, slightly fossiliferous marly claystone, and a few ! oÂ greenish-gray shale and interbedded arkosic, conglomeratic sandstone and

! ! Qt2 ! FIGURE 1—Bioclastic limestone slabs of Juana Lopez member of the Carlisle Shale 5 ! !

! 3 FIGURE 2—Pliocene(?) dike (arrow) intruded into Carlisle Shale ȱȱȱ¢ȱȱȱȱ ȱȱ¢ȱȱȱ ȱ ȱ ȱ ȱ ȱ ǯȱ ¡ȱ ȱ ȱ ! o ! along the south side of Storrie Lake near dam. Sangre de Cristo Mountains west of Las Qca ! o !

F ! along New Mexico Highway 3 north of Storrie Lake Dam.

! ! Vegas NW quadrangle in distance. View to the west. ȱȱ ¢ȱȱȱȱȱǯȱȱȱȱȱ¡ȱ ȱřşŚȱȱǻŗřŖŖȱǼǯ ! 000 ! af 000 3946 ! 3946 Kcl locally along the south side of Storrie Lake and in slopes along the east side

! Madera Group (Upper and Middle Pennsylvanian)—Upper part

Kg ȱ ȱ ǰȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ǯȱ ȱ ¡ȱ

Kg Qf 3 *m

5 Ä

Knl ! (Alamitos Formation) -- Red-gray and greenish-gray shale and calcareous Qca o o Qt3 remaining thickness of the shale unit (KnlǼȱȱȱ ȱȱȱȱ- 3 o

Q 3 Kcl ! Qt3 Ä ! ȱȱȱŗŖŖȱȱǻřřŖȱǼǯȱȱȱȱȱȱȱȱȱ shale, fossiliferous marine thin to thick gray limestone, argillaceous o Kg Kcj 5 1 Kcc 6 ȱȱȱęȬȱȱǻĵǰȱŗşŝŘǼȱ ȱȱȱȱȱȱ limestone, arkosic limestone, nodular limestone, thin to thick marine and o o Qpl

o Kcl Ä non-marine arkosic conglomeratic sandstone with red marly shale and Qt2 ! ȱȱȱǰȱȱ ȱǻKnsǼȱȱȱȱȂǯ

3 Qt2 Qca !

o 7 2 ! ȱȱȱǯȱȱȱȱȱȱȱȱȱ

o !

3 ! 3

o Kcl ! 4 Qp o Carlile Shale (Upper Cretaceous)—ȱ ȱ ȱ ȱ ȱ ȱ ȱ Ǳȱȱ ȱȱǻȱǼȱȬȬȱ ¢ǰȱȱȱǰȱȱ ! Kc

3945000 Â ! af 3945000 References ǰȱ ȱȱȱȱ ȱǰȱȱ ȱȱǰȱȱȱ ! 4 o marine limestone, interbedded thin to thick dark-gray shale and a minor

! !

! ȱǰȱȱȱȱǰȱȱȱ ȱ£ȱǯȱȱ

3 Qca Qa ! ǰȱ¢ȱǯȱȱȱȱȱȱȱȱǯȱȱ

! 3 o ĵǰȱǯȱ ǯǰȱŗşŝŘǰȱ ȱȱȱȬȱȱȱ ȱȱǰȱ

! oÄ A thin section of shale may lie above the Juana Lopez, but was included here ȱȱŘŝŚȬŜŖŞȱȱǻŞŘŖȱȱŘŖŖŖȱǼǯȱ

4 ȱ ȱȱȱǰȱȱȱ¢ǰȱ ȱ¡Ǳȱǯǯȱ ȱ

! af

! ȱȱȱǯȱȱȱȱȱȱȱŗŖŚȱȱǻřŚŖȱǼǯ Â Qca o af

! Kcu

! ȱ ¢ȱȱ ȱ ȱȱ ȬŜŝřǰȱȱŗǱŘŚǰŖŖŖǯ Sandia Formation (Middle and Lower Pennsylvanian)—Interbedded, ! !

Kcl o *s ! Kg

! gray shale, thin- to massive-bedded, arkosic sandstone and conglomerate !

2! ! ! ĵǰȱǯȱ ǯǰȱȱȂǰȱǯȱ ǯǰȱŗşŞŜǰȱ ȱȱȱȱȱȱȱȱȱ Kcc o 3 Juana Lopez Member— Ȭ¢ȱ ¢ȱ ǰȱ ¢ȱ

! 2 ȱȱȬ¢ǰȱȱǯȱȱȱȱȱřŖśȱ

Knl Kcj ! Kcj ! o

! ȱ ǰȱȱȱȱǰȱȱȱȱǰȱ ȱ¡Ǳȱȱǯǯȱ fossiliferous to bio-clastic, arenaceous, sparry limestone and ! o

! ȱǻŗŖŖŖȱǼǯ ! Kcu

! ȱ ȱ¢ȱȱ ȱȱȱ Ȭŗśŝśǯȱȱ ȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ ǯȱȱ 000 2 000 3944 ! Kcu 3944 ! Qp Kcj Limestone contains abundant needle-like fragments of Inocera- 3 Knl Qt2 Arroyo Peñasco Group (Upper and Lower Mississippian)—Upper part o ǰȱǯǰȱŘŖŖřǰȱ ȱȱȱȱȱȱŝǯśȂȱǰȱȱȱ¢ǰȱ Ma Qca ȱ ǯȱ ȱ ȱ ȱ ǰȱ ȱ ȱ ęȱ ȱ (Terrero Formation) – Gray, sandy limestone, limestone and limestone Kg ȱ ȱ¡Ǳȱ ȱ¡ȱȱȱ ¢ȱȱȱǰȱ Qp ¢ȱ ¢Ǳȱȱȱȱȱȱ¢- ǯȱ ȱ ȱ ǻȱ ȱ ǼȯȬ¢ȱ ǰȱ

! ȱ ȱȱ ȱǰȱȬ ȱŝŘǯ ȱ ǰȱ ȱ ȱ ȱ ǻĵȱ ȱ Ȃǰȱ ŗşŞŜǼǯȱ ! ȱ ȱ ȱ ȱ ȱ ǯȱ ȱ ȱ ȱ

Qp ! Qca ȱśȱȱǻŗŜȱǼȱǯ ! Qp ŚǯŜȬřŚȱȱǻśȬŗŗŖȱǼǯ M QTg

Qca

Knl ! Qc Kg

Qp ! ! 3943000 Qca 3943000 B Qp Kg James D. Hancock B' Qp 8,000 8,000 1 Wm. Sedberry (1959) DW St. Clair Sapello River Qp Mon. Energy Monument Energy Hoover, et al. Kcj Kgr #1 Sedberry (1968) Kc Kcj North South #1 Sue Ann (1974) NM #1 (1929) Kcc Qca QTg #1 Sedberry (1974) Qc Qca Qt2 Qca Qp Qg Ti? Qca Kc Kg

Ä Kg Kg Qt1 2 Qca Kg Kc Qp Kg Qca Qca Kcj o Qp Kgr

Qt1 Kcc Kcl Kgr Qca Kgr 2 J Qca o B 6,000 Kd 35°37'30"N 35°37'30"N Jm + Jt + Je Kd Jm + Jt + Je 6,000 000 Jm + Jt + Je 478 479000 480000 481000 482000 483000 484000 485000 486000 487000 488000 105°15'0"W 35°37'30"N 105°12'30"W 105°10'0"W 35°37'30"N 35°37'30"N ^c + ^s ^c + ^s ^c + ^s

TD= 2073 ft. Pb + Py +Pg Base map from U.S. Geological Survey 1948, from photographs taken 1946, field checked in 1947, edited in 1948. Pb + Py +Pg Polyconic Projection,1927 North American datum, Reprojected to UTM projection -- zone 13N 4,000 4,000 1000-meter Universal Transverse Mercator grid, zone 13, shown in red 1:24,000 Psc Psc 1 0.5 0 1 MILE Geologic map of the Las Vegas NW

*a + *s SAPELLO LAKE ISABEL LOMA PARDA 1000 0 1000 2000 3000 4000 5000 6000 7000 FEET *a + *s quadrangle, San Miguel County, New Mexico 2,000 TD= 4817 ft. Ma 2,000 TD= 4813 ft. TD= 5030 ft.

NEW MEXICO 1 0.5 0 1 ? TD= 5184 ft. ? Kilometers Las (\ at 5058? 5002?) MONTEZUMA Vegas ONAVA \ CONTOUR INTERVAL 25 FEET \ ? \ NW May 2003 ? NATIONAL GEODETIC VERTICAL DATUM OF 1929 Sea Level Sea Level Magnetic Declination June, 2009 OJITOS FRIOS LAS VEGAS LAS VEGAS SE 9º 2' East At Map Center by A A' New Mexico Bureau of Geology and Mineral Resources Alvis L. Lisenbee 10,000 QUADRANGLE LOCATION QUADRANGLE LOCATION Open-file Map Series Cerro Colorado Fault South Dakota School of Mines and Technology, Rapid City, South Dakota, 57701 Creston Anticline OFGM 78 MDte *s MDte Cañon Bonito 8,000 COMMENTS TO MAP USERS Kgr Monument Energy Kcc Kns Qt3 Qt3 #1 Sue Ann (1974) Kg Qca Qt1 Qt2 Qp Kcl Kg Qca A geologic map displays information on the distribution, nature, orientation, and age relationships Qca Ti Qca Kcj Kcj of rock and deposits and the occurrence of structural features. Geologic and fault contacts are Mapping of this quadrangle was funded by a matching-funds grant from the STATEMAP program Kn irregular surfaces that form boundaries between different types or ages of units. Data depicted of the National Cooperative Geologic Mapping Act, administered by the U.S. Geological Survey, on this geologic quadrangle map may be based on any of the following: reconnaissance field and by the New Mexico Bureau of Geology and Mineral Resources, (Dr. Peter A. Scholle, New Mexico Bureau of Geology and Mineral Resources Jm + Jt + Je Kgr 6,000 Director and State Geologist, Dr. J. Michael Timmons, Geologic Mapping Program Manager). 6,000 Kd geologic mapping, compilation of published and unpublished work, and photogeologic interpretation. New Mexico Tech Locations of contacts are not surveyed, but are plotted by interpretation of the position of a given 801 Leroy Place Jm + Jt + Je ^c + ^s + Pb contact onto a topographic base map; therefore, the accuracy of contact locations depends on the Socorro, New Mexico scale of mapping and the interpretation of the geologist(s). Any enlargement of this map could cause p_ 87801-4796 ^c + ^s + Pb misunderstanding in the detail of mapping and may result in erroneous interpretations. Site-specific Py conditions should be verified by detailed surface mapping or subsurface exploration. Topographic 4,000 4,000 [575] 835-5490 Py and cultural changes associated with recent development may not be shown. Psc Cross sections are constructed based upon the interpretations of the author made from geologic Psc mapping, and available geophysical, and subsurface (drillhole) data. Cross-sections should be used as This and other STATEMAP quadrangles are available an aid to understanding the general geologic framework of the map area, and not be the sole source for free download in both PDF and ArcGIS formats at: *m + *s of information for use in locating or designing wells, buildings, roads, or other man-made structures. *m + *s 2,000 http://geoinfo.nmt.edu 2,000 The map has not been reviewed according to New Mexico Bureau of Geology and Mineral Resources *m + *s standards. The contents of the report and map should not be considered final and complete until TD= 5030 ft. Ma 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 Ma p_ necessarily representing the official policies, either expressed or implied, of the State of New Mexico, or Sea Level the U.S. Government. Sea Level