File:FacectxF23 044929 2199 XI 39N010Wlabeled.jpg
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Summary
Landforms near Face. Mesa, ridges, and possible cirques are present. A cirque (French, from the Latin word circus) is an amphitheatre-like valley formed by glacial erosion. Alternative names for this landform are corrie (from Scottish Gaelic coire, meaning a pot or cauldron) and cwm (Welsh "valley"). A cirque may also be a similarly shaped landform arising from fluvial erosion.
The concave shape of a glacial cirque is open on the downhill side, while the cupped section is generally steep. Cliff-like slopes, down which ice and glaciated debris combine and converge, form the three or more higher sides. The floor of the cirque ends up bowl-shaped as it is the complex convergence zone of combining ice flows from multiple directions and their accompanying rock burdens: hence it experiences somewhat greater erosion forces, and is most often overdeepened below the level of the cirque's low-side outlet (stage) and its down slope (backstage) valley. If the cirque is subject to seasonal melting, the floor of the cirque most often forms a tarn (small lake) behind a dam which marks the downstream limit of the glacial overdeepening: the dam itself can be composed of moraine, glacial till, or a lip of the underlying bedrock.[1]
Location: 39.94 N and 350.02 E
Image Credit: NASA/MSSS/Secosky
Licensing
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- ↑ Knight | first = Peter G. | title = Encyclopedia of Earth Sciences Series: Encyclopedia of Paleoclimatology and Ancient Environments | publisher = | series = Cirques | volume = 1358 | edition = | location = Springer Netherlands | year = 2009 | pages = 155–56 | doi = 10.1007/978-1-4020-4411-3_37 | isbn = 978-1-4020-4551-6|
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:58, 21 March 2020 | | 1,693 × 555 (284 KB) | Suitupandshowup (talk | contribs) | Landforms near Face. Mesa, ridges, and possible cirques are present. A '''cirque''' (French, from the Latin word ''circus'') is an amphitheatre-like valley formed by glacial erosion. Alternative names for this landform are '''corrie''' (from Scottish Gaelic coire, meaning a pot or cauldron) and '''cwm''' (Welsh "valley"). A cirque may also be a similarly shaped landform arising from fluvial erosion. The concave shape of a glacial cirque is open on the downhill side, while the cupped secti... |
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