| Baffin Bay, Texas is a flooded late Pleistocene/Holocene incised valley created by Petronila, San Fernando, and Los Olmos Creeks during a sea-level fall between 120-20 ka. The bay has partially filled with Holocene sediments and preserves an excellent record of coastal environmental changes over the last 8.0 ka.; Using seven cores up to 14.5 m in length and 65 km of high-resolution seismic data, we recognize three major changes in depositional environments within upper Baffin Bay, occurred at 8.0 ka, 5.5 ka and 4.3 ka. The 8.0 ka event is interpreted to be the result of a rapid sea-level rise associated with the drainage of Lake Agassiz. Both the 5.5 ka and 4.3 ka events were interpreted to be caused by a combination of climate change and the flooding of antecedent topography. |
