By
E. Roworth and R. P. Signell
Coastal and Marine Geology Program
U.S. Geological Survey
Woods Hole, MA 20543

November 1998

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards (or with the North American Stratigraphic Code).  Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.