Age of Marginal Wisconsin Drift at Corry, Northwestern Pennsylvania

Science  25 Dec 1959:
Vol. 130, Issue 3391, pp. 1760
DOI: 10.1126/science.130.3391.1760


Marl began to accumulate about 14,000 years ago, as determined by radiocarbon dating, in a pond in a kettle hole in Kent drift at Corry, Pa., 9 miles inside the Wisconsin drift margin. This radiocarbon age represents the minimum time since the disappearance of the ice from Corry and confirms an assignment of Cary age to the drift.