| 单词 |
riegel |
| 释义 |
‖ riegel Physical Geogr.|ˈriːgəl|
Also Riegel. Pl. riegels, riegeln.
[Ger., a. MHG. rigel crossbar for fastening, OHG. rigil bar; see rail n.2]
A low, transverse ridge of resistant bedrock on the floor of a glacial valley; = rock bar s.v. rock n.1 9 a.
1910Geogr. Jrnl. XXXV. 284 Where a barrier of more resistant rock has hemmed in a portion of the valley (Riegel), narrow picturesque gorges have been cut. 1916G. Taylor With Scott iii. 136 Leaving the glacier and the upper lake, I proceeded east to the Riegel... This bar across a great glacial gorge was paralleled by many in the Swiss Alps... In my opinion this bar (or riegel), and the more important one we discovered..are relics of ‘steps’ in the original topography. 1954W. D. Thornbury Princ. Geomorphol. xv. 370 Steps..have been attributed to the effects of varying rock hardness, the idea being that risers and associated riegels mark hard rock ‘bars’ across a glacial trough. 1957G. E. Hutchinson Treat. Limnol. I. i. 71 The basins are divided by transverse ridges, presumably Riegeln or rock bars. 1968R. W. Fairbridge Encycl. Geomorphol. 745/1 Partly worn-down cross-valley bars of resistant rock (‘riegels’) remain, impounding lakes, though these have commonly been drained by rivers that have cut gorges through the riegels since the melting of the glaciers. |
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