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la
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unmapped
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343000m.E
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4294
000m
. N
9595
9696
9797
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9999
43004300
0101
0202
0303
0404
0505
0606
0707
08
38o 54' 41" N118o 43' 27" W
38o 54' 36" N118o 50' 22" W
38o 46' 44" N
118o 47' 10" W
38o 46' 48" N118o 40' 15'' W
4241
08
NEVADA BUREAU OF MINES AND GEOLOGY Prepared as part of the STATEMAP components of the National Cooperative Geologic Mapping Program in cooperation with the U.S. Geological SurveyOPEN-FILE REPORT 09-13
PRELIMINARY GEOLOGIC MAP OF THE SOUTHERN PART OF THE LOWER WALKER RIVER AREA, MINERAL COUNTY, NEVADA
94
Qe
Qfi
Qflp
Qfo
Qfy
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Qli1Qli2
Qlo
Qly
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Qrda
Qrdh1Qrdh2Qrdh3Qrdh4Qrdh5
Qrh
Qrh1Qrh2Qrh3Qrh4Qrh5
Qxla Walker Lake
Active gravel bars
Beach gravel deposits
Miscellaneous depositsHolocene playa sediments
Late Pleistocene beach gravel
Holocene alluvial fan deposits
Historical lacustrine sediments
Active delta of the Walker River
Late Holocene lacustrine sedimentsLate Pleistocene lacustrine sediments
Disturbed area / anthopogenic deposits
Late Pleistocene alluvial fan depositsMiddle to early(?) Pleistocene fan deposits
Holocene to late Pleistocene eolian sediments
Historical channels, bars and terraces, undivided
Undivided lacutrine sediments, mainly mud and sand
Active river channel river channel and emergent bars
Late Holocene beach gravel and related shoreline features
Older pre-1997 fluvial deposits, possibly coeval with Qrdh2
Historical delta deposits of the Walker River (ca. 1882-1900)Historical delta deposits of the Walker River (ca. 1900-1919)Historical delta deposits of the Walker River (ca. 1919-1925)Historical delta deposits of the Walker River (ca. 1925-1946)Historical delta deposits of the Walker River (ca. 1946-1997)
Youngest pre-1997 fluvial deposits, coeval with part of Qrdh5Intermediate pre-1997 fluvial deposits, coeval with part of Qrdh4
Channels and bars related to flooding and channel migration in 1997
Late Pleistocene fan-pediment / lacustrine platform veneer sediments
Oldest historical channel deposit in map area, possibly coeval with Qrdh2
Middle to early(?) Pleistocene lacustrine sediments (cf. Reheis et al., 2002)Late Pleistocene lacustrine sediments. Includes Sehoo highstand of Lake Lahontan
Piedmont deposits of the Wassuk and Gillis Ranges (based in part on Demsey, 1987)
Lacustrine Deposits of Walker Lake and Lake Lahontan (based in part on Demsey, 1987)
Fluvial channel, bar, and terrace deposits of the Walker River (based in part on Adams, 2007)
Historical beach gravel and related shoreline features. Age ranges from 1868-1882 to the present
Delta deposits of the Walker River (approximate age ranges adapted from Blair and McPherson, 1994)
Youngest late Pleistocene lacustrine sediments. Includes gravel deposits related to stable lake level at 1310-1315 m
Qrdh5
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Qly Qlgy
Holoc
ene
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Histor
ical p
eriod
(ca.
1888
-2008
)
Pleist
ocen
e
Fluvial Deposits of the Walker River
Channel andterrace deposits Delta deposits
Lacustrine Deposits of Walker Lake and Lake Lahontan
Sand andmud
Beach gravel
Piedmont Deposits of the Wassuk and Gillis Ranges
Miscellaneous Deposits
Playa Eolian Lake Disturbed
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1 Hussman Spring2 Schurz3 Gillis Canyon NW4 Hu-Pwi Wash5 Buck Brush Spring6 Reese River Canyon7 Gillis Canyon8 Ghost Dance Ridge9 Butler Mtn.10 Cooper Canyon11 Walker Lake12 Ryan Canyon
Adjoining 7.5'quadrangle names
1 2
5 7
9
3
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10 11
4
8
12
Map location
Projection: Universal Transverse Mercator, Zone 11, North American Datum 1983 (m)Base map: U.S. Geological Survey Schurz 7.5' Quadrangle (1988), Gillis Canyon NW 7.5' Quadrangle (1988), Reese River Canyon 7.5' Quadrangle (1988), Gillis Canyon 7.5' Quadrangle (1988)
Scale 1:24,000
CONTOUR INTERVAL 10-40 FEET
kilometer0 0.5 1
mile0 0.5 1
feet0 1000 2000 3000 4000 5000
Internal contact Solid where certain and location accurate.
Contact Solid where certain and location accurate, long-dashed where approximate, short-dashed where inferred, dotted where concealed; queried where uncertain.
?
Wave-modified fault scarp
õ õ õ õ õ õ õ õ õ õ õ õ õ õ õ õ õ õErosional shoreline Solid where certain and location accurate; queried where uncertain. Triangles point onshore.
Lacustrine spit or bar Solid where certain and location accurate; queried where uncertain.
Fault Solid where certain and location accurate, long-dashed where approximate, short-dashed where inferred, dotted where concealed; queried where uncertain.
?
?
?
References
Adams, K. D., 2007, Late Holocene sedimentary environments and lake-level fluctuations at Walker Lake, Nevada, USA: Geological Society of America Bulletin, v. 119, no. 1/2, p. 126—139.Blair, T. C., and McPherson, J. G., 1994, Historical adjustments by Walker River to lake-level fall over a tectonically tilted half-graben floor, Walker Lake Basin, Nevada: Sedimentary Geology, v. 92, p. 7—16.Demsey, K., 1987, Holocene Faulting and Tectonic Geomorphology Along the Wassuk Range, West-Central Nevada [M.S. thesis]: University of Arizona, 64 p.Reheis, M. C., Sarna-Wojcicki, A. M., Reynolds, R. L., Repenning, C. A., and Mifflin, M. D., 2002, Pliocene to Middle Pleistocene lakes in the western Great Basin: Ages and connections, in Hershler, R., Madsen, D. B., and Currey, D. R., eds., Great Basin Aquatic Systems History: Washington, D.C., Smithsonian Institution Press, p. 53—108.
Field work done in 2008-2009Supported by the U.S. Geological Survey STATEMAP Program (Agreement No. 08-HQ-AG-0053)DRAFT Preliminary geologic map Has not undergone office or field review Will be revised before publicationEdited by XXXXXXXXXXXXXXXXXCompilation by P. Kyle HouseCartography and map production in ESRI ArcGIS v9.3 (ArcGeology v1.3) by Heather ArmenoFirst Edition, October 2009Printed by Nevada Bureau of Mines and GeologyThis map was printed on an electronic plotter directly from digital files. Dimensional calibration may vary between electronic plotters and X and Y directions on the same plotter, and paper may change size; therefore, scale and proportions may not be exact on copies of this map.
For sale by: Nevada Bureau of Mines and Geology 2175 Raggio Pkwy. Reno, Nevada 89512 ph. (775) 784-6691, ext. 2 www.nbmg.unr.edu; [email protected] 2058
PRELIMINARY GEOLOGIC MAP OF THE SOUTHERN PART OF THE LOWER WALKER RIVER AREA, MINERAL COUNTY, NEVADA
P. Kyle House and Kenneth D. Adams2009
