			 UNITED STATES

                   DEPARTMENT OF THE INTERIOR

                        GEOLOGICAL SURVEY




            XDETECT Version 2.01 Technical Reference 
                      (Version June, 1991)



                               by

                         John A. Rogers

                        William M. Kohler

                    Open File Report #92-XXX

                     Menlo Park, California

                              1992
















This report is preliminary and has not been edited or reviewed
for conformity with Geological Survey standards and nomenclature.
Any use of trade names and trademarks in this publication is for
descriptive purposes only and does not constitute endorsement by
the U.S. Geological Survey.

Although this program has been used by the U.S. Geological
Survey, no warranty, express or implied, is made by the USGS as
to the accuracy and functioning of the program and related
program material, nor shall the fact of distribution constitute
any such warranty, and no responsibility is assumed by the USGS
in connection therewith.