单词 | uparch |
释义 | upˈarch, v. Geol. [f. up- 4.] trans. To raise (strata, etc.) to form a broad dome or anticline. Hence upˈarching vbl. n., the raising of strata into an anticlinal form; the structure so produced.
1877G. K. Gilbert Rep. Geol. Henry Mountains iv. 95 So soon as the lava can uparch the strata it does so, and the sheet becomes a laccolite. 1911Ann. Assoc. Amer. Geographers I. 43 The present form and altitude of the range is therefore not due to the monoclinal displacement of the compound mass..but to the broad and simple up-arching of a much later date. 1954Jrnl. Glaciol. II. 420 In a small quarry..I again photographed up-arching of granite. 1970R. J. Small Study of Landforms iii. 94 The strong tensional forces arising from uparching produce structural weaknesses..at the crest of an anticline. 1979Prof. Papers U.S. Geol. Survey No. 1127. 1/1 A regional north-south compression..uparched several east-trending anticlines in central Washington. |

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