LAMASKIN, Todd1, RIVAS, Jonathan A.2, BARBEAU Jr., David3, SCHWARTZ, Joshua, PhD4, RUSSELL, John A.2 and CHAPMAN, Alan5, (1)University of North Carolina Wilmington, Dept. of Earth & Ocean Sciences, 601 S. College Rd., Wilmington, NC 28403-3201, (2)Department of Earth and Ocean Sciences, University of North Carolina Wilmington, 601 South College Rd., Wilmington, NC 28403, (3)School of the Earth, Ocean and Environment, University of South Carolina, Columbia, SC 29208, (4)Department of Geological Sciences, California State University Northridge, 18111 Nordhoff Street, Northridge, CA 91330, (5)Geology, Macalester College, 1600 Grand Ave., Saint Paul, MN 55105-1801