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Isostatic gravity map with simplified geology of the Los Angeles 30 x 60 minute quadrangle

Open-File Report 2003-269

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Abstract

This isostatic residual gravity map is part of the Southern California Areal Mapping Project (SCAMP) and is intended to promote further understanding of the geology in the Los Angeles 30 x 60 minute quadrangle, California, by serving as a basis for geophysical interpretations and by supporting both geological mapping and topical (especially earthquake) studies. Local spatial variations in the Earth's gravity field (after various corrections for elevation, terrain, and deep crustal structure explained below) reflect the lateral variation in density in the mid- to upper crust. Densities often can be related to rock type, and abrupt spatial changes in density commonly mark lithologic boundaries. The map shows contours of isostatic gravity overlain on a simplified geology including faults and rock types. The map is draped over shaded-relief topography to show landforms.

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Isostatic gravity map with simplified geology of the Los Angeles 30 x 60 minute quadrangle
Series title:
Open-File Report
Series number:
2003-269
Edition:
Version 1.0
Year Published:
2003
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Contributing office(s):
Geology, Minerals, Energy and Geophysics Science Center
Description:
Readme; Metadata; Map: PDF, 55.16 x 36.35 inches; Map: EPS; Data
Country:
United States
State:
California
City:
Los Angeles
Projection:
Universal Transverse Mercator projection
Scale:
100000