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Line 1: {{More citations needed\|date=May 2014}} Glacial '''Lake Connecticut''' formed over what is now [[Long Island Sound]] and coastal [[Connecticut]] at the fore edge of the ice sheet of the [[Wisconsin glaciation]], as the lobe of the [[Laurentide ice sheet]] began to retreat, some 18 to 20,000 yBP. It was dammed by the [[terminal moraine]] that now forms the spine of [[Long Island]] and [[Fishers Island]]. About 15,000 yBP, the moraine dam that impounded Lake Connecticut failed; the outlet, known as The Race for its tidal [[rip current]]s, lies between the [[North Fork]] of Long Island and Fishers Island. For a time, much of the lake bed was exposed to wind-driven erosion: the cue is found in soundings that reveal regional [[Unconformity\|unconformities]] in the bed of Long Island Sound.▼ {{Infobox lake \| name = Glacial Lake Connecticut \| image = \| image_caption = \| alt = \| location = Over what is now Long Island Sound and coastal Connecticut \| coords = \| type = Glacial lake \| inflow = Meltwater from the Laurentide Ice Sheet \| outflow = The Race (tidal outlet between the North Fork of Long Island and Fishers Island) \| catchment = \| basin_countries = United States \| length = About the same size as present-day Long Island Sound \| width = \| area = \| depth = 78 feet (24 m) (average depth of Long Island Sound today) \| volume = \| residence_time = \| shore = \| islands = \| pushpin_map = \| pushpin_map_alt = \| pushpin_map_caption = }} ▲Glacial '''Lake Connecticut''' formed over what is now [[Long Island Sound]] and coastal [[Connecticut]] at the fore edge of the ice sheet of the [[Wisconsin glaciation]], as the lobe of the [[Laurentide ~~ice~~Ice ~~sheet~~Sheet]] began to retreat, some 18 to 20,000 ~~yBP~~years before present. It was dammed by the [[terminal moraine]] that now forms the spine of [[Long Island]] and [[Fishers Island]]. About 15,000 ~~yBP~~[[Before Present\|BP]], the moraine dam that impounded Lake Connecticut failed; the outlet, known as The Race for its tidal [[rip current]]s, lies between the [[North Fork, Suffolk County, New York\|North Fork]] of Long Island and Fishers Island. For a time, much of the lake bed was exposed to wind-driven erosion: the cue is found in soundings that reveal regional [[Unconformity\|unconformities]] in the sediment bed of Long Island Sound. The fore-edge lake formed by ~~its~~glacial meltwater expanded to be about the same size as present-day Long Island Sound; it may have been connected at times with similar freshwater lakes in [[Block Island Sound]] and [[Buzzards Bay]], while sea level was low. The fairly shallow average depth of 78 feet (24 m) of today's Long Island Sound is the result of fine lake-bottom sediments deposited as glacial outwash slowed in Lake Connecticut. Suspended as [[rock flour]], the fine sediments would have rendered Lake Connecticut a turquoise blue-green. The end of Lake Connecticut was marked by a series of intervals of salt water incursion after about ~~15000~~15,000 ~~yBP~~[[Before Present\|BP]] and subsequent refreshening, as [[sea level rise\|rising sea levels]] and [[isostatic rebound]] of land depressed by the former weight of ice sheets adjusted to one another. ==See also== * [[Glacial Lake Cape Cod]] * [[Glacial Lake Nantucket Sound]] ==References== {{reflist}} [http://arboretum.conncoll.edu/publications/34/CHP1.HTM Geologic History of Long Island] {{webarchive \|title=Geologic History of Long Island Sound \|url=https://web.archive.org/web/20100529193345/http://www.conncoll.edu/ccrec/greennet/arbo/publications/34/chp1.htm \|date=May 29, 2010}} [[Category:Former lakes\|Connecticut, Lake]]▼ ~~[[Category:Historical geology]]~~ {{Pleistocene Lakes and Seas}} [[Category:Glaciology]]▼ {{authority control}} {{DEFAULTSORT:Connecticut, Lake}} [[Category:Former lakes of the United States]] [[Category:Glacial lakes of the United States]] ▲[[Category:~~Former~~Lakes ~~lakes\|Connecticut,~~of ~~Lake~~Connecticut]] ▲[[Category:~~Glaciology~~Long Island Sound]] [[Category:Natural history of Connecticut]] [[Category:Natural history of New York (state)]] {{Glaciology-stub}} {{Connecticut-geo-stub}} {{palaeo-geo-stub}}