Meehan and Jack Van Montfrans also provided field assistance. Patrice Mason and Dr. Frank Perkins provided much guidance in the preparation of samples for SEM. Bill Jenkins is thanked for his faithful reproduction of SEM micrographs into glossy prints. Ellen Fisher helped with grain size analysis and Sam Wilson performed salinity analyses. I greatly appreciate the help given to me by Tom Armitage and Adam Frisch in the use of the computer for word process ing . Mr. and Mrs. Moore provided

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... ship and needed encouragement throughout the course of this study. Finally, I thank my friends at Ashe House-Cheol, Carol, Cathy, Maurizio, Giovanna, Steve, Roberto, Larry, Judy, and K im -for pulling me away from my work occasionally.