MAP LOCATION

NEVADA

M O

U N

T A

I N

S

M E

A D

O W

Traf

Tkft

Qt3

Qt3

Qt3

Trf

Trf

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Qt3

Qt3

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Qt2.5

Qt2.5

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Tyt

Tbil

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Qt3

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29

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Traf

SPRINGS

KANE

WASH

CALDERA

MARGIN

QTa Qal

Qal

Qaw

Qae

QaeTkfc

Qal

Tkfc

Tt

Qc

Qc

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Tard

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Qt3 Qt3

Qt3

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Stratigraphic contact—Dip of contact shown in some areas

Intrusive contact—Dip of contact shown in some areas

Margin of area underlain by exposed K horizon in unit Tam

High-angle normal fault—Showing dip (barbed arrow) and trend and plunge of lineation (diamond-shaped arrow). Dashed where approxi-mately located; dotted where concealed; queried where uncertain. Bar and ball on downthrown side

Thrust fault—Solid teeth on upthrown side. Dashed where approximately located; dotted where concealed

Landslide margin—Open teeth on the landslide side. Dashed where approximately located

Fault scarp along which younger unit has been deposited—Hachures on side of postfault deposit

Strike and dip of sedimentary beds and of compaction foliation of ash-flow tuffs

Inclined

Horizontal

Trend and plunge of flow lineation on compaction foliation

Strike and dip of flow foliation—In lava flow or flow foliation created by post-emplacement flow in an ash-flow tuff

Inclined

Vertical

Flow lineation on flow foliation

Flow lineation

Hydrothermally altered area

Caldera margin (topographic wall)—Half-circles on down-dropped caldera interior. Dotted where concealed; queried where uncertain

Prospect

5370

79

30

65 36

79

7936

36

Qal

Qae

Qaj

Qaw

QTes Tc QTa

Qt1

Qt3

Qt2.5

Qt2

Angular unconformity

Angular unconformity

Post-collapse extracaldera units

Post-collapse caldera-filling units

BEDROCK UNITS

CORRELATION OF MAP UNITSSURFICIAL UNITS

Tbt

Tby

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?

?

Tbd

Tam

Tmh

Pliocene

Holocene

Alluvial and colluvial depositsEolian deposits

Colluvial deposits

QuaternaryLate Pleistocene

Middle Pleistocene

Early Pleistocene

Tas

QawTas

Qc

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7000 FEET1000 10000 2000 3000 4000 5000 6000

.5 1 KILOMETER1 0

SCALE 1:24 0001/ 21 0 1 MILE

CONTOUR INTERVAL 40 FEET DATUM IS MEAN SEA LEVEL

U.S. DEPARTMENT OF THE INTERIORU.S. GEOLOGICAL SURVEY

SCIENTIFIC INVESTIGATIONS MAP 2892Version 1.0

Pamphlet accompanies map

Bedrock and surficial geologic mapping by Robert Scott and Anne Harding in 1995 and 1989, respectively

Map digitized by Randy Kuehn; GIS database by Sharon SmithDigital cartography by Norma MaesEdited by F.C. Brunstein

Base from U.S. Geological Survey, 1969Polyconic projection, 1927 North American datum10,000-foot grid based on Nevada coordinate system, east zone; 1,000-meter Universal Transverse Mercator grid ticks, Zone 11

SURFICIAL UNITS

Alluvial and Colluvial Deposits

LIST OF MAP UNITS

Alluvium and colluvium (late Holocene)Alluvium and colluvium (early Holocene and latest Pleistocene)

Alluvial and colluvial terrace deposits (early Holocene and latest Pleistocene)

Alluvium and colluvium of Jumbo Wash (late Pleistocene)

Alluvial and colluvial terrace deposits (late Pleistocene)

Alluvial and colluvial terrace deposits (late Pleistocene)

Alluvium and colluvium of Willow Spring (middle Pleistocene)

Alluvial and colluvial terrace deposits (middle Pleistocene)

Alluvium and colluvium (early Pleistocene and Pliocene?)

Aggradational side-stream fan deposits (Pliocene)

Aggradational main-stream fan deposits (Pliocene)

Alluvium and colluvium of Willow Spring (middle Pleistocene) over aggradational side-stream fan deposits (Pliocene)

Eolian depositEolian silt (early Pleistocene? and Pliocene?)

Colluvial depositsColluvium (Quaternary)

Colluvium (Pliocene)

BEDROCK UNITS

Post-collapse extracaldera

Muddy Creek and Horse Spring Formations (late? and middle Miocene)

Basaltic flows (Miocene)

Basaltic dike (Miocene)

Qal

Qae

Qt3

Qt2.5

Qt2

Qaw

Qt1

QTa

Tam

Tmh

QTes

Tc

Tby

Tbd

Qaw/Tas

Qaj

Tard

Trds

Tar

Trf

TytTraf

Tgr

Tbrf

Tbrd

Trlr

Tt

Tbil

Twb

Tkqr

Tkwl

Tsmu

Tsml

Ts

Tdl

Th

Thh

Tcb

Tlc

Tt1

Trls

Tgls

Tt2

Tlpc

Tt3

Tl

Tcg

Pkt

Prb

Tbiu

Tbt

Post-collapse caldera-filling units

Upper basaltic intracaldera flows (Miocene)

Aphyric rhyolitic dikes (Miocene)

Rhyolitic dikes (Miocene)

Rhyolitic dike swarm (Miocene)Aphyric rhyolitic flows (Miocene)

Rhyolitic flows (Miocene)

Yellow ash-flow tuff (Miocene)

Red ash-flow tuff (Miocene)

Gray rhyolite flows (Miocene)

Biotite-rhyolitic flows (Miocene)

Biotite-rhyolitic dikes (Miocene)

Red-lithic rhyolitic ash-flow tuff (Miocene)

Trachytic stock (Miocene)

Lower basaltic intracaldera flows (Miocene)

Caldera wall breccia (Miocene)

Kane Springs Wash caldera in-flow units

Kane Wash Tuff (Miocene)

Gregerson Basin Member

Flow-lineated cooling unit

Trachytic zone

Comenditic zone

Quartz-rich rhyolitic ash-flow tuff

Welded lithic-rich rhyolitic tuff

Columnar-jointed cooling unit

Trachytic zone Comenditic zone

Lower tuffs (Miocene) shown in cross section only

Kane Wash Tuff (Miocene)

Gregerson Basin Member

Lower cooling unit

Trachytic zone

Comenditic zone

Grapevine Spring Member

Pre-Kane Springs Wash caldera units

Precaldera trachyte (Miocene)

Pumice-rich ash-flow tuff of Narrow Canyon caldera (Miocene)

Sunflower Mountain Tuff, undivided (Miocene)

Upper zone

Lower zone

Tuffaceous sandstone (Miocene)

Delamar Lake Tuff (Miocene)

Hiko Tuff (Miocene)

Harmony Hills Tuff (Miocene)

Bauers Tuff Member of the Condor Canyon Formation (Miocene)

Leach Canyon Formation (Oligocene)

Unnamed rhyolitic ash-flow tuff (Oligocene)

Unnamed red limestone (Oligocene)

Unnamed gray limestone and pebble conglomerate (Oligocene)

Unnamed rhyolitic ash-flow tuff (Oligocene)

Unnamed gray limestone and red pebble conglomerate (Oligocene)

Unnamed rhyolitic ash-flow tuff (Oligocene)Unnamed limestone (Oligocene)

Unnamed cobble conglomerate (Oligocene)

Tas

Qc

1969 MAGNETICDECLINATION

15 / °1 2

MAG

NET

IC N

OR

TH

TRU

E N

OR

TH

Tlt

Tkjt

Tkjc

Tkblc

Tkg

Tpt

Tpr

Tkblt

×

A′

A

Trd

Tkft

Tkfc

Kane Springs Wash caldera inflow units

Pre-Kane Springs Wash caldera units

Major angular unconformity

Traf

Twb

Tt

Tkblc

Tkg

Tbrd

Tbiu

Tpt

Tpr

Tsmu

Tsml

Tdl

Th

Thh

Tcb

Tlc

Tt1

Trls

Tgls

Tlpc

Tt2

Tt3

Tl

Tcg

Pkt

Prb

Miocene

Localunconformities

Oligocene

Tertiary

Permian

Tar

Tyt

Tbrf

Ts

? ?

?

?

Trlr

Tgr

Trf Tyt

Tbil

Tkft

Tlt

Tard Trds?

Trd

TkfcTkqr

Tkwl

Tkjt

Tkjc

Tkblt

ByRobert B. Scott1 and Anne E. Harding2

2006

GEOLOGIC MAP OF THE VIGO NE QUADRANGLE, LINCOLN COUNTY, NEVADAManuscript approved for publication July 15, 2005

Any use of trade names in this publication is fordescriptive purposes only and does not implyendorsement by the U.S. Geological Survey

For sale by U.S. Geological Survey Information ServicesBox 25286, Federal Center, Denver, CO 80225This map was produced on request, directly fromdigital files, on an electronic plotter. It is also available as a PDF file at http://pubs.usgs.gov/1-888-ASK-USGS

ArcInfo coverages and a PDF for this map are available athttp://pubs.usgs.gov

1U.S. Geological Survey, Denver, CO 802252Volunteer, U.S. Geological Survey, Denver, CO 80225

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Tkfc

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TardTard

Tard Tard Tard

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TltTlt

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Tkft TkftTkft

Tkft Tkft TkftTyt

TytTyt Tkfc

TkfcTas Tas Tar

Tkg

Qal

Thh

TsmlTsmuTpt

Twb ThTdl

Tkblc

TkfcTkjc

Tkjc

Trd

Tkjc

Tkjc

Tkjc

Tkjc

Tkjt Tkjt

A A′

METERS

1000 1000

SEA LEVEL SEA LEVEL

METERS

Kan

e S

pri

ng

s W

ash

ca

lder

a m

arg

inMeadow Valley Mountains

TkjtTkfc

Tkfc TkjtTkjt Tkft Tyt

Bedded tuff (Miocene)

Kane Springs Wash caldera outflow units

Paleozoic units

Kaibab Limestone and Toroweap Formation, undivided (Lower Permian)

Red beds (Lower Permian)

Tyt