Abstract by Kaleb Markert
Reconstruction of a Holocene Carbonate Strand Plain from Integration of High-resolution GPR and Carbon-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 because of their potentially high porosity. Unfortunately, ancient strand plains are difficult to identify in the rock record because of a lack of research on modern analogs. Advances in Ground Penetrating Radar (GPR), allowing shallow high-resolution subsurface mapping, have enhanced the understanding of modern carbonate systems. Sandy Hook on San Salvador Island is a Holocene strand plain, ideally situated to be used as a modern strand plain analog. Sandy Hook consists of approximately 35 beach/dune ridges. Multiple 3D GPR surveys were conducted over some of these ridges using a 400-MHz antenna, supplemented by 2D GPR profiles. Both the 3D and 2D surveys furnish detailed high-resolution images of stacked clinoforms dipping eastward, toward the Atlantic Ocean. Integration of 3D and 2D GPR surveys with carbon-14 dating of carbonate sand deposits provides a depositional analog model for strand plain systems.