Acknowledgments

The authors thank the captain and crew of the NOAA ship Thomas Jefferson for their work in collecting and processing bathymetry and sidescan-sonar data. We also thank Barry Irwin, the captain of the RV Rafael, for his support in collecting sediment samples and bottom photography. The title-page graphic and remaining figures in this report were derived from the base and (or) data layers produced as part of this project and are provided in the Geographic Information System Data Catalog. This report has benefited from critical reviews by Laura Brothers, Jonas Casey-Williams, VeeAnn Cross, and Erika Lentz (all of the USGS).