Isostatic gravity map of the Los Angeles 30 x 60 minute quadrangle, California

Online link https://geo-nsdi.er.usgs.gov/metadata/open-file/03-269/metadata.faq.html
Description Gravity data were compiled, collected, and edited to produce an isostatic gravity map of the Los Angeles 30 x 60 minute quadrangle, California. This record focuses primarily on the principal facts, that is, gravity observations, and the corrections made
Originators Wooley, R. J.; Yerkes, Robert F.; Langenheim, Victoria E.; and Chuang, F. C.
Publication U.S. Geological Survey Open-File Report 03-269

Related topics

States or counties

station

Point at which gravity anomaly was measured

Label Definition
STAT Station Name--An alphanumeric combination of up to 8 characters used for station identification
LaD Degree Latitude North
LaM Decimal Minute
LoD Degree Longitude West
LoM Decimal Minute
ELEV Elevation in feet
acc accuracy indicator?
OG Observed gravity, in mGal
FAA Free-air anomaly, in mGal
SBA Simple Bouguer anomaly, in mGal
ITC Inner terrain correction for a density of 2.67 g/cc, in mGal. See Code column for radius of correction.
TTC Total terrain correction from the station to 166.7 km for a density of 2.67 g/cc, in mGal.
Code Letter denoting the zone (radius) of the correction
CBA Complete Bouguer anomaly reduced for a density of 2.67 g/cc, in mGal.
ISO Isostatic residual anomaly,in mGal,assuming an Airy model for isostatic compensation of topographic loads. This model assumes a crustal thickness of 25 km, a topographic load density of 2.67 g/cc, and a density contrast across the base of the model crust of 0.4 g/cc. Isostatic correction would be difference between CBA and ISO values.