...Berryman
email
: berryman@sep.stanford.edu
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
...Wang
Department of Geology and Geophysics, University of Wisconsin, Madison, WI 53706.
email
: wang@geology .wisc.edu
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stanford Exploration Project
4/20/1999