<P> East of Oneida and Cazenovia Lakes are the headwaters of the Susquehanna River and Hudson River watersheds (the former in the foothills of the Catskills, the latter through the Mohawk Valley and southern Adirondack Mountains). </P> <P> The 2,000 - acre (8 km) muckland of a valley located in Potter, New York, which is part of Torrey Farms, was almost a 12th Finger Lake, as the waterline is just below the surface . It lies between Lakes Canandaigua and Seneca, and was once a swamp . </P> <P> These glacial finger lakes originated as a series of northward - flowing streams . Around two million years ago, the first of many continental glaciers of the Laurentide Ice Sheet moved southward from the Hudson Bay area, initiating the Pleistocene glaciation . These scouring glaciers widened, deepened, and accentuated the existing river valleys . Glacial debris, possibly terminal moraine left behind by the receding ice, acted as dams, allowing lakes to form . Despite the deep erosion of the valleys, the surrounding uplands show little evidence of glaciation, suggesting that the ice was thin, or at least unable to cause much erosion at these higher altitudes . The deep cutting by the ice left some tributaries hanging high above the lakes--both Seneca and Cayuga have tributaries hanging as much as 120 m above the valley floors . </P> <P> Much of the Finger Lakes area lies upon the Marcellus Shale and the Utica Shale, two prominent natural gas reserves . Due to the recent popularization of fracking technology, the natural gas is now available to extraction . While some large landowners have leased their lands, and a number of small landowners would like to follow suit, many residents of the Finger Lakes oppose the process of extraction due to concerns about groundwater contamination and the industrial impact of the extraction related activities . The first direct actions and local legislative actions against fracking occurred in the Finger Lakes bioregion . In December 2014, the government of New York banned all fracking within the state, citing pollution risks . </P>

New york’s finger lakes were formed by the same process as the great lakes. what was this process
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