THE EVOLUTION OF COASTAL-PLAIN INCISED VALLEYS OVER MULTIPLE GLACIO-EUSTATIC CYCLES: INSIGHTS FROM THE INNER CONTINENTAL SHELF OF DELAWARE, USA

摘要

While Quaternary incised valleys have been abundantly studied along passive continental margins, little work has addressed the development, reoccupation, and infilling of systems with small drainage basins that originate near the coastal-prism apex, despite their abundance on the inner shelf and influence on Holocene coastal evolution and seafloor morphodynamics. This paper documents the evolution of several incised tributary valleys to the ancestral Delaware River. It is based on insights from over 450 offshore sediment cores, approximately 500 km of digital seismic-reflection data, and a detailed geochronology of nearly 50 radiocarbon ages.