| 释义 |
Laramide, a. Geol.|ˈlærəmaɪd|
[f. Laramie, name of a city and mountain range in the Rocky Mountains, after *Laurentide a.]
Of, pertaining to, or designating the orogeny during which the mountain ranges in the west of the Americas, or the Rocky Mountains in particular, were formed (see quot. 1972). Also absol.
1895J. D. Dana Man. Geol. (ed. 4) iii. 359 The Laramide system of mountain ranges extends along the summit of the Rocky Mountains far northward into British America, and southward into Mexico. 1915F. L. Ransome in W. N. Rice et al. Probl. Amer. Geol. vi. 364 It has..been believed by many that the Laramide System is essentially Pacific in origin. 1924J. Joly Radioactivity & Surface Hist. Earth 30 The Tethys, which was greatly reduced at the close of the Laramide Revolution, has again increased and extends to the Pacific. 1972Gloss. Geol. (Amer. Geol. Inst.) 397/1 Geologists differ as to whether to restrict the Laramide closely in time and space, as to a single event near the end of the Cretaceous, and to deformations near the type area—or whether to apply it broadly to all orogenies from early in the Cretaceous through the Eocene or later, and to deformations in the whole Cordilleran belt of western North America. 1974Nature 8 Feb. 349/1 It has been traditional to apply the term Laramide to the period of deformation of the northern Rocky Mountains in Montana and Canada. 1993D. V. Ager Nature of Stratigr. Record (ed. 3) viii. 136 The widespread regression at the end of Cretaceous times may be related to..the Laramide orogeny along the westerm edge of the American plate. |