Of similar note, here is an article
from Sunday's Post & Courier (Charleston) that references many bathymetric mapping projects projects I worked with offshore of SC while at the College of Charleston. We found evidence of ice scours from the last ice age about 60 miles offshore.
They are currently seeking funding to perform archaeological research and locate evidence of Clovis settlements that were at the edge of the ice during the Older Dryas (small window of an extremely cold climate in which the glaciers reached their maximum southward advance).
We have evidence of 3 separate meandering river beds, and a small forest about 40 miles off the coast of Myrtle Beach.