Compiled November 12, 1998 from information provided by participants at the Workshop.
Revised September 27, 1999.
Send comments and updates to:
William M. Brown
USGS/GD
Box 25046, MS 750
Denver, CO 80225-0046 U.S.A.
Email: wbrown@usgs.gov
Phone: 303-236-8747, ext. 240
Grecia R. Matos
USGS/GD
12201 Sunrise Valley Drive, MS 988
Reston, VA 20192
Email: gmatos@usgs.gov
Phone: 703-648-7714
Published in the Central Region, Denver, Colorado
Manuscript approved for publication December 8, 1999
Graphics by Joe Springfield and by individuals indicated in captions
Photocomposition by Gayle M. Dumonceaux and Lorna Carter
Edited by Lorna Carter