U.S. DEPARTMENT OF THE INTERIOR OPEN-FILE REPORT 92-0186
U.S. GEOLOGICAL SURVEY SHEET 1 OF 1

116°52'30"
We ~ ¥ 38° 37/30” CORRELATION OF MAP UNITS
. BO fms
| Sedimentary, ash-flow tuff,

Ob,
y ay aN ash-fall tuff, and lava units
EX Sore
oO we

Qmt

Intrusive rocks

> QUATERNARY

Pleistocene(?)

Osw af Qa3 at is Ols2 J Holocene

Unconformity
Tt } Miocene
Trt
= Tea
: 4
Unconformity ug
Tbs Tr Tq
Tom
Tay ks
TdKs
Tok) <—TdKs—]
TKS
Unconformity
Tr
~ Wis <r]
Tru3 Trub
<n
Tf Tru2 > TERTIARY
Tru
Tr
= > Oligocene
mM << Ts <ceT Tp
Unconformity ?
Tos
§ =
Trai
iV er Unconformity Tap
TM)) Wy ma
Ae \\\ Atte A Tis
oa .& y Tq!
S Unconformity
ee |
* ae § {Coco toram Unconformity
y ye A Unconformity
Er. UI Nant! \
; CRETACEOUS
SAS Ja Kbgp_ Kba
PARA Sr “ Kbgf
t p | a Va] Kbgs
\ se Kbg
ies + oR Unconformity
= 8 : Oo LOWS % Otic
; a
a a SN ox ee
i 3 . Osa an
4 Ba Ef [|p Sen =
To) aN Oral
Ror s Ota
= \ - Os > ORDOVICIAN
il “i Thrist Fault
f 5
ff aS G = Samer
|
dasa A i Osa Ozal PALEOZOIC
DA dl Zz UNDIVIDED
N Oza Ozs
Thrust Fault
u Bias R ; <a] Pzmg <_Pame | Pzmm ]
ones ny oa GH
a =a i al Tale P2ma <Pama |
N Oggs aa CAMBRIAN
a Pzmd
" Thrust Fault
f ’ Thrust Fault
os
> ae, - le ¥: 2 MAP SYMBOLS
ss ey 4 a ;
wre W/o es [Queries on map symbols indicate uncertain :
VA aie ‘Os
ae 1S, Le
A,
shows dip
Strike and dip of layered rocks
my Layered rocks, in part schistose, showing dip. Arrow shows direction and
plunge of lineation
a Schistose layered rocks. Double arrows show horizontal lineation
60~}— Vertical layered rocks. Arrow shows plunge of lineation
oe Vertical layered rocks. Double arrows show horizontal lineation
= Overturned layered racks
Strike and dip of foliation
yr20 Schist or flow-laminated rhyolite. Arrow shows direction and plunge of
lineation
LES Overturned foliated rocks
4-40 Vertical foliated rocks. Arrow shows plunge of lineation
180. Shear foliation in granite
+ Vertical shear foliation in granite
ft Anticline--Showing trace of axial plane and plunge of axis
—}— Syncline--Showing trace of axial plane and plunge of axis
2
15--+— Fold axis--Showing trend and plunge, and dip of limbs
»
2-— Minor fold axis-Showing trend and plunge
5
tS} Quartz vein--Arrow shows dip: cross on vertical vein
55, .
+h} aplite dike--Arrow shows dip; cross on vertical dike
ee — Volcanic dike
2 Mylonite layer--Showing dip; arrow shows direction and plunge of lineation. One
to two meters thick. Queried long-dashed line shows uncertain projection
of the layer based on measured attitudes and sparse mylonite float.
Observed in Kbgp in northeast corner of the quadrangle
Field station--Location of recorded observation, measurement, or collection of
rock sample
Qa2a
Recall \
117°00' 116°52'30"
Mapped, edited, and published by the Geological Surve 1 : : Geology mapped by D.R. Shawe , August 1977, ° . oo.
pe y oa y i . SCALE 1:24 GOO June “August 1987, July - September 982, This map is preliminary and has not been
2 0 : : ‘
f : — —_ = aay UE A August 1991 reviewed for conformity with U. S.
: 6 ae ey . Geological Survey editorial standards nor
5 ) ‘ ¥

with the North American stratigraphic code.
CONTOUR INTERVAL 40 FEET ;
DOTTED LINES REPRESENT 20 FOOT COUNTOURS
NATIONAL GEODETIC VERTICAL DATUM OF 1929

GEOLOGIC MAP OF THE BELMONT WEST 7 1/2 - MINUTE QUADRANGLE NYE COUNTY, NEVADA
By

Daniel R. Shawe
1992