UNITED STATES DEPARTMENT OF THE INTERIOR
GEOLOGICAL SURVEY
Principal Facts for Gravity Stations in
Gerlach and San Emidio Known Geothermal
Resource Areas (KGRA) , Nevada
BY
Donald L. Peterson and Danny A. Dansereau
.
U.S. Geological Survey
Open-file Report 75-668
1975
This report is preliminary and has not been
edited or reviewed for conformity with U.S.
Geological Survey standards and nomenclature.
PRINCIPAL FACTS FOR GRAVITY STATIONS
IN GERLACH AND SAN EMIDIO KNOWN
GEOTHERMAL RESOURCE AREAS (KGRA), NEVADA
BY DONALD L. PETERSON AND DANNY A. DANSEREAU
HEADINGS OF THE ACCOMPANYING TABLES OF PRINCIPAL FACTS ARE EXPLAINED
IN THE FOLLOWING LIST:
STATION
LATITUDE
STATION DESIGNATION
NORTH LATITUDE IN DEGREES,
MINUTES, AND HUNDREDTHS OF
MINUTES
WEST LONGITUDE IN DEGREES,
MINUTES, AND HUNDREDTHS OF
MINUTES.
ELEVATION IN FEET'
OBSERVED GRAVITY IN MILLIGALS
SIMPLE BOUGUER ANOMALY IN
MILLIGALS FOR A~l ASSUMED
DENSITY OF 2,67 GPER CC
LONGITUDE
ELEV.
OBSERVED GRAVITY
BOUGUER ANOMALY
THESE DATA ARE REFERENCED TO THE GRAVITY BASE STATION IN GERLACH,
NEVADA, WITH AN OBSERVED GRAVITY VALUE OF 979829.16 MILLIGALS
(ACIC REFERENCE NO. 2350-'~ (See fig. 1.)
lTo convert feet to metres, multiply by 0.3048.
,
GRAVITY BASE STATION
LATITUDE
o
.
40 39.1' N
LONGITUDE
119
ELEVATION
0
21.2' W
STATION DESIGNATION
(1)
GERLACH
(1)
COUNTRY/STATE
. 3934 ft
(1)
USA/Nevada
REFERENCE COOE NUMBERS
ADOPTED GRAVITY VALUE
979 829.16
ESTIMATED ACCURACY
+
0.1
mgals
mgals
DATE
MONTH/YEAR
Jan/1969
DESCRIPTION AND/OR SKETCH
Station is in Gerlach, C%l the east side of town, at the We·s tern Pacific
Railroad depot, which is J50 ft southeast of Nevada Highway 81 and
across the street frem a cafe and a hotel. Station is outside the depot
building, on the east side of it, (i.e. facing the tracks), and at tbe
southeast corner of it, 0.5 rt from the wall, on the concrete apron.
Site is monumented with a standard. "USAF Gravity Sta~ionn disc.
(1)
, .
Figure 1.
Location of gravity base station for Gerlach and San Emidio,
Nevada, gravi ty surveys.
2
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