https://marspedia.org/index.php?action=history&feed=atom&title=File%3AFacectxF23_044929_2199_XI_39N010Wlabeled.jpg 2026-05-15T14:32:58Z Revision history for this page on the wiki MediaWiki 1.34.2 https://marspedia.org/index.php?title=File:FacectxF23_044929_2199_XI_39N010Wlabeled.jpg&diff=135287&oldid=prev 2020-03-21T13:58:56Z

<p>Landforms near Face. Mesa, ridges, and possible cirques are present. A &#039;&#039;&#039;cirque&#039;&#039;&#039; (French, from the Latin word &#039;&#039;circus&#039;&#039;) is an amphitheatre-like valley formed by glacial erosion. Alternative names for this landform are &#039;&#039;&#039;corrie&#039;&#039;&#039; (from Scottish Gaelic coire, meaning a pot or cauldron) and &#039;&#039;&#039;cwm&#039;&#039;&#039; (Welsh &quot;valley&quot;). 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...</p> <p><b>New page</b></p><div>== Summary ==<br /> 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 &quot;valley&quot;). A cirque may also be a similarly shaped landform arising from fluvial erosion.<br /> <br /> 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 (lake)|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.&lt;ref&gt;Knight | first = Peter G. | title = Encyclopedia of Earth Sciences Series: Encyclopedia of Paleoclimatology and Ancient Environments | publisher = [[Springer-Verlag| ]] | 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|&lt;/ref&gt;<br /> <br /> Source: http://viewer.mars.asu.edu/planetview/inst/ctx/F23_044929_2199_XI_39N010W#P=F23_044929_2199_XI_39N010W&amp;T=2<br /> <br /> Location: 39.94 N and 350.02 E<br /> <br /> Image Credit: NASA/MSSS/Secosky<br /> <br /> == Licensing ==<br /> {{PD}}</div>

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