very interesting reading and charts....
Click Below for information on the geologic origins of Ambergris Caye, a study by Dr. Sal Mazzullo, Geology Dept, Wichita State University, and a long time friend of Belize
Late Pliocene to Holocene platform evolution in northern Belize, and comparison with coeval deposits in southern Belize and the Bahamas http://AmbergrisCaye.com/art/Sedimentology-mazzullo.pdf
Based on just about 30 years of research in northern Belize. It was time to sum everything up, and he spent a year writing it.