| 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. |
This map is available as a Portable Document File and an Encapsulated PostScript file
Download this map as a PDF file (3.4 MB) or an EPS file (89 MB)
Download the readme file for the data as an ASCII text file
Download the gravity data for this map as a ASCII text file (380 KB)
Download the FGDC-compliant metadata for this report (12 KB)
For more about geologic mapping in Southern California, visit the SCAMP website
For more about earthquake studies in Southern California, visit the USGS Pasadena Office of Earthquake information
For questions about the content of this report, contact Vicki Langenheim
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