Bernd 10/26/2020 (Mon) 18:04:03 No.40734 del
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These are the Finger Lakes in the United Statia. Recently someone posted a couple of pictures of them, looked mildly interesting so I run a search.
They are glacial products, overdeepened valleys. 11 + 1 lay just south of Lake Ontario. Two of them are notable of being among the deepest lakes in the US, with 133 and 188 meters of depth.