Abstract by Kaleb Markert
Depositional Modeling Carbonate Strand Plain Development Using High-Resolution GPR and C-14 Dating
Understanding modern carbonate depositional systems gives valuable insights into the interpretation of ancient carbonate systems. Ancient carbonate strand plains act as productive hydrocarbon reservoirs. Unfortunately, ancient strand plains are difficult to identify in the rock record. Advances in ground penetrating radar (GPR) has enhanced the understanding of modern systems, including strand plains. Sandy Hook, located at the southeast corner of San Salvador Island in the Bahamas, is a strand plain consisting of approximately 35 beach/dune ridge-swale combinations. The ridges show signs of erosion and subsequent deposition suggesting four distinct phases of deposition. In this study, 20 sediment samples were collected from a depth of one meter. Sediment from 8 samples were C14-dated to create a depositional timeline. Four pseudo-3D GPR surveys were acquired using a 400 MHz antenna. Long 2D transects were acquired connecting the pseudo-3D surveys, to give context for the entire study area. A depositional model for modern strand plain systems was produced that interprets the ridge-swale combinations as deposited by storms.