Usas Escarpment

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title: "Usas Escarpment" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["landforms-of-marie-byrd-land", "escarpments-of-antarctica"] topic_path: "general/landforms-of-marie-byrd-land" source: "https://en.wikipedia.org/wiki/Usas_Escarpment" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

| Antarctica | lat_deg = 76 | lat_min = 0 | lat_dir = S | lon_deg = 130 | lon_min = 0 | lon_dir = W | mark = | marksize = 12 | AlternativeMap = Antarctica relief location map.jpg | label = Usas Escarpment | position = top | caption = Location of Usas Escarpment, Marie Byrd Land, Antarctica Usas Escarpment () is an expansive but discontinuous north-facing escarpment in Marie Byrd Land, Antarctica. It is about 200 nmi long, extending roughly west to east along the 76th parallel south from where the elevation of the snow surface descends toward the Ruppert Coast and Hobbs Coast. The position of the escarpment coincides with the north slopes of the Flood Range, Ames Range, McCuddin Mountains, and the eastern peaks of Mount Galla, Mount Aldaz and Benes Peak.

Location

::figure[src="https://upload.wikimedia.org/wikipedia/commons/8/83/C75124s5_Ant.Map_Mount_Galla.jpg" caption="Northeast end of escarpment, southeast of map"] ::

::figure[src="https://upload.wikimedia.org/wikipedia/commons/2/27/C76124s1_Ant.Map_Mount_Hampton.jpg" caption="Southeast end of escarpment, northeast of map"] ::

The western end of the range is north of the Executive Committee Range. Mount Galla is towards the northeast end. Mount Aldaz and Benes Peak are further to the east.

Exploration and name

The escarpment was observed by members of the United States Antarctic Service (USAS), 1939–41, and in ensuing scientific reports was referred to as 76th Parallel Escarpment. The approved name is an acronym for the discovery expedition.

Features

Features of the eastern end of the escarpment, from west to east, are

Mount Galla

Mount Aldaz

Benes Peak

References

Sources

  • {{citation|url=https://pubs.usgs.gov/fedgov/70039167/report.pdf |accessdate=2023-12-03 |edition=2 |editor-last=Alberts |title=Geographic Names of the Antarctic |editor-first=Fred G. |publisher=United States Board on Geographic Names |year=1995}}

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::

landforms-of-marie-byrd-landescarpments-of-antarctica