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U.S. Geological Survey Open-File Report 01-263
Version 1.0

Petrography and Physical Properties of Selected Rock Types Associated with the Hayward Fault, California

By Diane E. Moore and David A. Ponce

Summary

This publication is an online-only version of U.S. Geological Survey Open-File Report 01-263. The data for this publication total 5.8 MB.

Abstract

This report provides brief petrographic descriptions of rock samples collected from the vicinity of the Hayward Fault, Northern California. Two groups of rock samples are represented here:

  • A set of six samples that were used for laboratory measurements of P- and S-wave velocity , strength, density, and porosity. This group was examined using standard petrographic microscope, scanning electron microscope (SEM) and electron microprobe techniques on polished thin sections.

  • A larger group of samples, most of them 1"-diameter cores, on which density and magnetic susceptibility measurements were made as part of gravity and magnetic surveys of the Hayward Fault. Because this second group of samples received less extensive laboratory study, examination of them was limited to standard petrographic microscope examination of covered thin sections. The density and susceptibility measurements of this second group of samples are included in this report.

    Figure 1

    Shaded relief topographic map of the Hayward fault and vicinity showing seismicity (from Figure 1).

    Contents

    This publication contains a Portable Document Format (PDF) file that contains 34 pages with two figures, 15 tables, and one appendix.

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    To contact the senior author, email Diane Moore (dmoore@usgs.gov).

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    URL of this page: http://geopubs.wr.usgs.gov/open-file/01-263
    Maintained by: Carolyn Donlin
    Created: 10/16/2001
    Last modified: 10/17/2001 (mfd)