uparchv.

Etymology: < up- prefix 3a.Previous versions of the OED give the stress as: upˈarch.

Geology.

transitive. To raise (strata, etc.) to form a broad dome or anticline.

ΚΠ

1877 G. K. Gilbert Rep. Geol. Henry Mts. (U.S. Geogr. & Geol. Surv. Rocky Mt. Region) iv. 95 So soon as the lava can uparch the strata it does so, and the sheet becomes a laccolite.

1970 R. J. Small Study of Landforms iii. 94 The strong tensional forces arising from uparching produce structural weaknesses..at the crest of an anticline.

1979 Prof. Papers U.S. Geol. Surv. No. 1127. 1/1 A regional north-south compression..uparched several east-trending anticlines in central Washington.

Derivatives

upˈarching n. the raising of strata into an anticlinal form; the structure so produced.

ΚΠ

1911 Ann. 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.

1954 Jrnl. Glaciol. 2 420 In a small quarry..I again photographed up-arching of granite.

This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2019).

单词	uparch
释义	uparchv. Etymology: < up- prefix 3a.Previous versions of the OED give the stress as: upˈarch. Geology. transitive. To raise (strata, etc.) to form a broad dome or anticline. ΚΠ 1877 G. K. Gilbert Rep. Geol. Henry Mts. (U.S. Geogr. & Geol. Surv. Rocky Mt. Region) iv. 95 So soon as the lava can uparch the strata it does so, and the sheet becomes a laccolite. 1970 R. J. Small Study of Landforms iii. 94 The strong tensional forces arising from uparching produce structural weaknesses..at the crest of an anticline. 1979 Prof. Papers U.S. Geol. Surv. No. 1127. 1/1 A regional north-south compression..uparched several east-trending anticlines in central Washington. Derivatives upˈarching n. the raising of strata into an anticlinal form; the structure so produced. ΚΠ 1911 Ann. 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. 1954 Jrnl. Glaciol. 2 420 In a small quarry..I again photographed up-arching of granite. This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2019). < v.1877
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