USGS Open-File Report 01-375: A Gravity Data Along LARSE (Los Angeles Regional Seismic Experiment) Line 2, Southern California

A Gravity Data Along LARSE (Los Angeles Regional Seismic Experiment) Line 2, Southern California

By R.J. Wooley and V.E. Langenheim

Abstract

The U.S. Geological Survey conducted a detailed gravity study along part of the Los Angeles Regional Seismic Experiment (LARSE) transect across the San Fernando Basin and Transverse Ranges to help characterize the structure underlying this area. 249 gravity measurements were collected along the transect and to augment regional coverage near the profile. An isostatic gravity low of 50-60 mGal reflects the San Fernando-East Ventura basin. Another prominent isostatic gravity with an amplitude of 30 mGal marks the Antelope Valley basin. Gravity highs occur over the Santa Monica Mountains and the Transverse Ranges. The highest isostatic gravity values coincide with outcrops of Pelona schist.

First posted October 29, 2001

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For additional information, contact:
Geology, Minerals, Energy, and Geophysics Science Center
U.S. Geological Survey
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Menlo Park, CA 94025-3591
http://geomaps.wr.usgs.gov/gmeg/

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Suggested citation:

Wooley, R. J., Langenheim, V. E., 2001, A Gravity Data Along LARSE (Los Angeles Regional Seismic Experiment) Line 2, Southern California: U.S. Geological Survey Open-File Report 01-375, 22 pp., https://pubs.usgs.gov/of/2001/0375/.

Contents

Abstract

Introduction

Acknowledgments

Gravity Data

Physical Property Data

Gravity Anomalies along the LARSE II Transect

Conclusions

References