| Pingualuit crater ： ウィキペディア英語版|
The Pingualuit Crater (French: cratère des Pingualuit; Inuktitut, "where the land rises"), formerly called Chubb Crater and later New Quebec Crater (''cratère du Nouveau-Québec''), is a young impact crater, by geological standards, located on the Ungava Peninsula, in the administrative region of Nord-du-Québec, in Quebec, in Canada. It is in diameter, and is estimated to be 1.4 ± 0.1 million years old (Pleistocene).
The crater is exposed to the surface, rising above the surrounding tundra and is deep. The deep annular Pingualuk Lake fills the hollow, and is one of the deepest lakes in North America. The lake also holds some of the purest fresh water in the world, with a salinity level of less than 3 ppm (the salinity level of the Great Lakes is 500 ppm). The lake has no inlets or apparent outlets, so the water accumulates solely from rain and snow and is only lost through evaporation. In terms of transparency, it is one of most transparent lakes in the world, with Secchi disk visible more than deep.〔(【引用サイトリンク】title=Pingualuit crater (Chubb crater) )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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