Electronic Data Submission for Paper 2001TC001319
Stress-direction history of the western United States and Mexico since 85 Ma
Peter Bird, Department of Earth and Space Sciences, University of California, Los Angeles, California, USA
Tectonics, volume 21, number 3, 10.1029/2001TC001319, 07 June 2002

INTRODUCTION

This electronic supplement contains 2 files (plus this file) which contain the collection
of paleostress direction indicators collected from the geologic literature on the 
western United States and Mexico since 85 Ma.
For a discussion of data types, data collection procedure, and known problems with the
data, see:
Appendix A: Collection of Paleostress Direction Data
in the paper cited above.

TABLE.txt: contains the data table.
Column "Reference"         contains the short form of the reference to published literature.
Column "Feature, Location" contains the type of paleostress indicator, district or county, and state.
Column "Code"              contains a sequential index number for use in referring to a line in the table.
Column "East Lon."         contains the East longitude (in degrees, always negative) of the datum location.
Column "North Lat."        contains the North latitude (in degrees, always positive) of the datum location.
Column "Azimuth (deg.)"    contains the azimuth of the most compressive horizontal principle stress,
                              in degrees clockwise from geographic North, in present coordinates.
                             (Note that there has been no palinspastic restoration of data azimuths.)
Column "Sigma (deg.)"      contains an estimated standard deviation for the Azimuth value, in degrees.
Column "After (Ma)"        contains the maximum age (in millions of years before present) of the indicator.
Column "Before (Ma)"       contains the minimum age (in millions of years before present) of the indicator.
Column "Type"              contains "Stage" if the stress direction indicator is valid for the entire
                             period from the After time to the Before time; or,
                           contains "Window" if the stress direction indicator is valid for one moment
                             sometime after the After time and before the Before time.

SOURCES.txt: contains full-form bibliographic citations to published sources
that are listed by their short forms (e.g., Matson [1960]) in TABLE.txt

Peter Bird
UCLA
2002.06.11