ˈupwarp Geol.
[up- 2.]
A gentle, extensive elevation of part of the earth's surface. Hence upˈwarping vbl. n., the raising of part of the earth's surface to form an upwarp.
| 1917 Prof. Papers U.S. Geol. Survey No. 93. 109/1 Synclines and anticlines, both broad and narrow, sharply delineated monoclines, and domical upwarps follow one another in succession. 1952 Geol. Mag. LXXXIX. 130 Three domal upwarps superimposed on the simple anticlinal structure. 1954 W. D. Thornbury Princ. Geomorphol. ix. 223 Intermittent upwarping took place, but there were periods of relative stillstand which are marked by erosional surfaces and terraces. 1974 Nature 23 Aug. 684/1 Owing to large scale Plio-Pleistocene up⁓warpings of the South African coastal margins, many rivers show substantially steeper gradients along their lower courses than in higher reaches. 1977 A. Hallam Planet Earth 78/2 An important feature of rift valleys is that they follow the crests of long, low upwarps of the Earth's crust. |