1. Marine Science Department, Coastal Carolina University, Conway, SC 29528, U.S.A.
2. Department of Geology Department , University of South Florida, Tampa, FL 33620, U.S.A.
3. Department of Geology, Baylor University, Waco, TX 76798, U.S.A.
4. Department of Geology and Environmental Geosciences, College of Charleston, Charleston, SC 29424, U.S.A.