| 单词 |
Laurentide |
| 释义 |
Laurentide a. Geol.|ˈlɒrəntaɪd, ˈlɔː-|
[f. Laurentides, name of a range of hills in Canada parallel to the St. Laurence River on its north-west side, a. F. Laurentides (F. X. Garneau Histoire du Canada (1845) I. ii. 180), f. St.-Laurent St. Lawrence.]
Pertaining to or designating the ice sheet which covered the eastern part of northern North America during the most recent (Wisconsin) glaciation.
1890G. M. Dawson in Amer. Geologist VI. 162 The writer ventures to propose that the eastern mer de glace may appropriately be named the great Laurentide glacier, while its western fellow is known as the Cordilleran glacier. 1897W. B. Scott Geol. xxxii. 526 This is called the Laurentide Ice-sheet or Glacier. 1957Encycl. Brit. X. 374/2 The Laurentide ice sheet overtopped the White mountains in New Hampshire and so was at least 5,000 ft. thick in that region. 1975Canad. Jrnl. Earth Sci. XII. 1499/2 Laboratory analysis of Laurentide and Cordilleran tills. 1987Geology XV. 537 (heading) Restricted regional extent of the Laurentide Ice Sheet in the Great Lakes basins during early Wisconsin glaciation. |
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