GEOPHYSICAL STUDIES IN NEVADA RELATING TO HYDROGEOLOGY
E
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IN
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J. N.
III
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J. t
2
39
40
GEOPHYSICAL STUDIES IN NEVADA RELATING TO HYDROGEOLOGY
SURF ACE GEOLOGY _______ _
SURVEY_____ _
REFRAC'l'ION SURVEY
DEPTH
REFERENCES ClTED _________ _
Figure
1.
2.
3.
4.
41
42
42
45
46
46
Page
of flow in Humboldt River between vvu"""
Sta tions ____________ _
and Rose Creek
map of the Rose Creek constriction
of the Humboldt River
map of the Rose Creek constriction
of Humboldt River_
Seismic
near the Rose
41
43
44
45
GEOPHYSICAL STUDIES IN NEVADA RELATING TO HYDROGEOLOGY
initiated in 1959 in
41
there are no surface
the
To 'CAl"";""'"
river
in the area
lower McNinch ranches
10 miles southwest
area
herein called the Rose Creek constriction of Humboldt River. The increase in
occurred
checked
located on a
,>-",<>v-.r"
£:.
U
-
£:.
U
c:
U')
::J
E
o
U
15
-
15
... ~
III
u 10
c:
'"
u
October
10 c:
iIJ
0'1
'-
0
.c
Au
5
u
In
5 a
50
25
20
15
Comus gaging station
Figure 1.
of flow in Humboldt River between Comus and Rose
o
Gaging Stations.
42
GEOPHYSICAL STUDIES IN NEVADA RELATING TO HYDROGEOLOGY
E
rocks of the area are
Muller, and
. The
and
in the immediate area,
the writers is north
second bounds the north side of the
and the third bounds the west side of the
lacustrine and
lacustrine
volcanic
are
the flanks of the ranges. One basalt
on
north side of Hum-
All
observations were made with a
Worden "Educator"
meter with
constant of 0.4657
western flank
northward to about Sec.
T, 35
data
that the fault
extends further northward beneath the
of
and Recent age to the
the
line between Sees. 21 and
it may be cut off
would have been to increase the
the ranges, less
to
in
a
across the constriction. The low
is near the corner of Sees.
and
off
to the west
was used.
would lead to very
because of the small
in the area. No
had been
range encountered
were made. If
aU'UUJ<O>.Y their effect
LEGEND
Miles
Scale
200
deposits.
Spring
--
Feet
' ....
_-
....,
o
SOURCES
119601,
Geologic
of Humboldt River.
OF
DATA
Lake Lann-njan sediments
unpubli shed
thesis 1
LEGEND
o
Miles
Scale
Contour
inhf1iul
c'ontcuf$
aT
1.0
0.5
Milllgai
Milligo
with
{Simple
dashed
Bouguer
supplementary
Anomaly)
Gravi ty
500 It
tsolot-ed
(most Iy
at
•
gravity
stations
ob'.ryotion
well.)
CD
~oin t s
tram
whfr-e
grnvit'i
CD
®
Figure 3.
Gr.avity map of the Rose Creek constriction of the Humboldt River.
de p t h 5
do to
41,5 fl.
250 fl.
to
or
bedrocj(
ore
measu red.
lied
,.ell
Colcu loled
Gl
1280 11.,
Calt u i-oted
®
3880 ft.
Calcu lo'~d
'co fcuja ted
45
GEOPHYSICAL STUDIES IN NEVADA RELATING TO HYDROGEOLOGY
A
at site
presence of
and bottomed in slates
unconsolidated
at 41.5 ft. The difference between the two Uvl"~">J
undulations in the bedrock-
is the same as the 7 ft. obtained
This 7-foot escarpcould be
recent movement
the extension of the East
Fault. It is on
strike and the
is in the proper direction.
The seismic method also
useful in
in the northwest corner
to
Seismic
returns were obtained at IO-foot
300 ft. with this "F'lintstone"
"roots" and
been
sinter.
E.
60
o
U
<i.I
rn
Di
Figure
nee
Seismic refraction profile
Rose Creek constriction.
46
GEOPHYSICAL STUDIES IN NEVADA RELATING TO HYDROGEOLOGY
3.
determinations from
data are difcontroL Calculations were
ficult without
the
and
a
to
was used. This value is in
with others used in the Great Basin
for the contrast between bedrock and the
fin.
at the four locations shown
are as follows:
Ranch-drilled
2.
250 ft.
saddle in the
4.
In all cases
ft.
on the east side of the anomat Rose Creek
surface is the elevation datum.
c
Geophysical Investigations in the
near
Nevada:
University