text accompanies map geologic map of the secret valley
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Field work done in 1971–1973, 1977, 1979–1983, 1985–1986, and 2020.Partially funded by the National S cience Foundation, the PetroleumResearch Fund, and the U S GS National Cooperative Geologic M appingProgram under S T AT EM AP award num ber G19AC00383. T he views andconclusions contained in this docum ent are those of the authors andshould not be interpreted as necessarily representing the official policies,either expressed or im plied, of the U .S . Governm ent.PEER-REVIEWED M AP Office review by Christopher D. Henry (NBM G), Andrew V. Z uza(NBM G), and Joseph Colgan (U S GS ) Field review by Christopher D. Henry (NBM G) and Andrew V. Z uza (NBM G)Com pilation by Arthur W. S noke, K eith A. Howard, and S eth DeeCartographic and style review by Jennifer VlcanCartography and m ap production in ES RI ArcGIS v10.7 by Rachel M icanderFirst Edition, M arch 2021S ym bology (per FGDC-S T D-013-2006)Printed by Nevada Bureau of M ines and Geology© Copyright 2021 T he U niversity of Nevada, Reno. All Rights Reserved.T his m ap was printed on an electronic plotter directly from digital files. Dim ensional calibration m ay vary between electronic plotters and X and Y directions on the sam e plotter, and paper m ay change size; therefore, scale and proportions m ay not be exact on copies of this m ap.
For sale by: Nevada Bureau of M ines and Geology 2175 Raggio Pkwy. Reno, Nevada 89512 ph. (775) 682-8766 www.nbm g.unr.edu; nbm [email protected] 2692
Map 189GEOLOGIC MAP OF THE SECRET VALLEY QU ADRANGLE, ELKO COU NTY, NEVADA
Text accompanies map
Partially fun ded by the Nation al Scien ce Foun dation , the Petroleum Research Fun d, an d the U S GS Nation al Cooperative Geolog ic Mappin g Prog ram un der STATEMAP award n umber G19AC00383NEVADA BU REAU OF MINES AND GEOLOGY
Suggested citation:S noke, A.W., Howard, K .A., and Dee, S ., 2021, Geologic m ap of the S ecret Valley quadrangle, Elko County, Nevada: Nevada Bureau of M ines and Geology M ap 189, scale 1:24,000, 21 p.
GEOLOGIC MAP OF THE SECRET VALLEY QUADRANGLE, ELKO COUNTY, NEVADA
Arthur W. Snoke1, Keith A. Howard
2 and Seth Dee
3
1University of Wyoming, Laramie, WY2U.S. Geological Survey, Mountain View, CA
3Nevada Bureau of Mines and Geology, University of Nevada, Reno
2021
115°15'00"W40°52'30"N 40°52'30"N
115°7'30"W
115°7'30"W40°45'00"N40°45'00"N
115°15'00"W
S ee accom panying text for full unit descriptions and references for this m ap.
Strik e an d dip of beddin g
Strik e an d dip of foliation or composition al layerin g
Overturn ed con tact
A
Brittle low-an g le n ormal fault (detachmen t fault) S olid where certain and locationaccurate, dashed where approxim ately located, dotted where concealed.Hachures on upper plate.
Inclined Vertical
Lin eamen t Fracture zones or sm all displacem ent faults located from aerialim agery. Dot-dashed where approxim ately located.
Lan dslide scarp Approxim ately located. Hachures point downslope.
Inclined¹20
Lin e of cross sectionA'
vo41
Plastic-to-brittle low-an g le n ormal fault (detachmen t fault) S olid wherecertain and location accurate, dashed where approxim ately located. Rectangleson upper plate.
Normal fault S olid where certain and location accurate, dashed whereapproxim ately located, dotted where concealed. S howing dip; ball ondownthrown side. In cross section, arrows show relative motion.
:
Syn clin e S olid where certain and location accurate.M
Bearin g an d plun g e of lin eation Includes elongation (stretching) lineationsin m ylonitic rocks as well as m ineral lineations in other rocks. S ym bol m aybe com bined with the foliation sym bol.
Ü15
U -Pb mon azite locality$$1
Meg afossil/fusulin id sample locality##1
Con odon t sample locality""9C
K-Ar sample locality!!A
Projection: U niversal Transverse M ercator, Z one 11, North Am erican Datum 1983 (m )Base m ap: U .S . Geological S urvey S ecret Valley 7.5' quadrangle (2018)
S cale 1:24,000
CONT OU R INT ERVAL 40 FEET
kilom eter0 0.5 1
m ile0 0.5 1
feet0 1000 2000 3000 4000 5000
A
Con tact S olid where certain and location accurate, dashed whereapproxim ately located.
U T M GRID AND 2017 M AGNET IC NORT H
DECLINAT ION AT CENT ER OF S HEET
^
M N
12º 35'1º 11'
GN
×××
1 Heelfly Creek2 T ent M ountain3 Hum boldt Peak4 S oldier Peak5 S ecret Valley6 Gordon Creek7 Verdi Peak8 Ruby City Creek9 Arizona S pring
Adjoining 7.5'quadrangle nam es
1 2
7
3
8 9
4 65
Overturneds82
Horizontal
¶
Bearin g an d plun g e of hin g e lin e of mesoscopic fold, with sen se of verg en cein dicated Z (clockwise) indicates dextral sense, whereas S (counterclockwise)indicates sinistral sense. S ym bol m ay be com bined with axial surface sym bol.
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POISON CANYON FAULT
RUBY MOU NTAINS–EAST HU MBOLDT RANGE DETACHMENT FAU LT
40Ar/39Ar date
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Fault S olid where certain and location accurate, dashed where approxim atelylocated, dotted where concealed.
S E C R E T H I L L S
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