How was the Casperkill formed?
Posted in Casperkill on Jun 18th, 2010 No Comments »
A map of Lake Dwight from Marlyn Magnus’ 1957 thesis. In 1957, Vassar student Marlyn Mangus completed a senior thesis in Geology in which she identified and mapped the boundaries of a glacial lake that formed in front of the retreating Laurentide ice sheet. This lake, which she named Lake Dwight, is thought to underlie […]