Acknowledgments

Funding for this project was provided by the U.S. Geological Survey (USGS) Coastal and Marine Geology Program (http://marine.usgs.gov/). Owen Brenner provided valuable field assistance during the survey. The authors are grateful to Chris Soller, Mike Bilecki, and Jordan Raphael with the National Park Service, Fire Island National Seashore (http://www.nps.gov/fiis/), who provided permitting, access, and assistance with field logistics.