Lake Hitchcock was a glacial lake that formed approximately 15,000 years ago in the late Pleistocene epoch. After the Laurentide Ice Sheet retreated, glacial ice melt accumulated at the terminal moraine and blocked up the Connecticut River, creating the long, narrow lake. The lake existed for approximately 3,000 years, after which a combination of erosion and continuing geological changes likely caused it to drain. At its longest, Lake Hitchcock stretched from the moraine dam at present-day Rocky Hill, Connecticut, to St. Johnsbury, Vermont (about 320 kilometres (200 mi)). Although the rift valley through which the river flows above Rocky Hill actually continues south to New Haven, on Long Island Sound, the obstructing moraine at Rocky Hill diverted the river southeast to its present mouth
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| - Lac Hitchcock (fr)
- Lake Hitchcock (en)
- Хичкок (озеро) (ru)
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| - Lake Hitchcock was a glacial lake that formed approximately 15,000 years ago in the late Pleistocene epoch. After the Laurentide Ice Sheet retreated, glacial ice melt accumulated at the terminal moraine and blocked up the Connecticut River, creating the long, narrow lake. The lake existed for approximately 3,000 years, after which a combination of erosion and continuing geological changes likely caused it to drain. At its longest, Lake Hitchcock stretched from the moraine dam at present-day Rocky Hill, Connecticut, to St. Johnsbury, Vermont (about 320 kilometres (200 mi)). Although the rift valley through which the river flows above Rocky Hill actually continues south to New Haven, on Long Island Sound, the obstructing moraine at Rocky Hill diverted the river southeast to its present mouth (en)
- Le lac Hitchcock est un lac proglaciaire disparu qui s'est formé il y a environ 15 000 ans durant le Pléistocène. Son nom lui a été donné en l'honneur du géologue Edward Hitchcock de l'Amherst College qui l'étudia. (fr)
- Хичкок (англ. Lake Hitchcock) — ледниковое озеро, которое образовалось примерно 15 000 лет назад в конце плейстоценовой эпохи. После отступления , накопленные морены заблокировали реку Коннектикут, создав длинные, узкие озёра. Озеро существовало около 3000 лет, после чего сочетание эрозии и продолжающихся геологических изменений, вероятно, вызвало его осушение. По своей длине, озеро Хичкок тянулось от морен (сегодня , Коннектикут), до теперешнего города , Вермонт (около 320 км). (ru)
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| - Lake Hitchcock was a glacial lake that formed approximately 15,000 years ago in the late Pleistocene epoch. After the Laurentide Ice Sheet retreated, glacial ice melt accumulated at the terminal moraine and blocked up the Connecticut River, creating the long, narrow lake. The lake existed for approximately 3,000 years, after which a combination of erosion and continuing geological changes likely caused it to drain. At its longest, Lake Hitchcock stretched from the moraine dam at present-day Rocky Hill, Connecticut, to St. Johnsbury, Vermont (about 320 kilometres (200 mi)). Although the rift valley through which the river flows above Rocky Hill actually continues south to New Haven, on Long Island Sound, the obstructing moraine at Rocky Hill diverted the river southeast to its present mouth at Old Saybrook. Lake Hitchcock is an important part of the geology of Connecticut. It experienced annual layering of sediments, or varves: silt and sand in the summertime (due to glacial meltwater) and clay in the wintertime (as the lake froze). Analysis of varves along Canoe Brook in Vermont was conducted by John Ridge and Frederick Larsen, including radiocarbon dating of organic materials. Their research indicates that the lake formed sometime prior to around 15,600 years ago. Later, abrupt changes in sediment composition around 12,400 years ago appear to mark the initial breaching of the lake's dam. These varved lake deposits were later used by European settlers for brick-making. The lake was named after Edward Hitchcock (1793–1864), a geology professor from Amherst College who had studied it. (en)
- Le lac Hitchcock est un lac proglaciaire disparu qui s'est formé il y a environ 15 000 ans durant le Pléistocène. Son nom lui a été donné en l'honneur du géologue Edward Hitchcock de l'Amherst College qui l'étudia. Lors du retrait vers le nord de la calotte glaciaire des Laurentides, la glace commença à fondre en déposant des moraines et des sédiments qui obstruèrent le cours du fleuve Connecticut ce qui créa un grand lac peu profond. Le lac resta en place durant près de 3 000 ans avant que l'érosion ne le fit disparaître. À son summum, le lac s'étendait entre les localités de Rocky Hill (Connecticut) et de Saint-Johnsbury (Vermont) sur environ 320 km. Alors que le fleuve Connecticut actuel s'écoule de Rocky Hill jusque New Haven, les eaux s'écoulaient à l'époque plus vers le sud-est au niveau de Old Saybrook. Le lac eut une grande influence sur la géologie du Connecticut. En effet, ce dernier déposa de nombreux sédiments sous forme de couches telles que les varves. Les sédiments déposés en été étaient composées de sables et de limons tandis qu'en hiver (lorsque le lac était gelé) il s'agissait plutôt d'argiles. Les colons européens utilisèrent par la suite ces couches de sédiments pour en faire des briques rouges. (fr)
- Хичкок (англ. Lake Hitchcock) — ледниковое озеро, которое образовалось примерно 15 000 лет назад в конце плейстоценовой эпохи. После отступления , накопленные морены заблокировали реку Коннектикут, создав длинные, узкие озёра. Озеро существовало около 3000 лет, после чего сочетание эрозии и продолжающихся геологических изменений, вероятно, вызвало его осушение. По своей длине, озеро Хичкок тянулось от морен (сегодня , Коннектикут), до теперешнего города , Вермонт (около 320 км). Озеро Хичкок является важной частью геологии Коннектикута. Оно смывало годовые слои отложений: ила и песка в летнее время (за счет талых ледниковых вод) и глины в зимнее время (при замерзании). Озеро было названо в честь , геолога из Амхерстского колледжа, который изучал его. (ru)
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