The Ronkonkoma Moraine, in the geography of Long Island, forms the southern of two ridges along Long Island's "backbone."Geological Survey: Quaternary History of the New York Bight: retrieved 2013-08-23.
Description The Ronkonkoma Moraine, a terminal moraine, was formed 21,000 to 22,000 years ago during the Wisconsin Glacial Episode. It predates the Harbor Hill Moraine - which cuts through the Ronkonkoma Moraine's western portions - by 3,000 years.
The Ronkonkoma Moraine and the Harbor Hill Moraine intersect at Lake Success in western Nassau County. Today, the moraine is most prominent in Suffolk County, where it traverses the center of Long Island and forms the South Fork.
Notable summits
Bald Hill – 331 ft (101 m)("The Bald Hills near Holtsville are the highest land in Suffolk County") Telescope Hill – 334 feet (102 m)
See also
Terminal moraine List of glacial moraines
References