- Contortion Spur
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Contortion Spur (80°25′S 160°9′E / 80.417°S 160.15°E) is the largest and easternmost of three spurs which descend north from Mount Madison near the mouth of Byrd Glacier. The spur exposes a spectacular syncline of white marble and black schist. It was geologically mapped on December 10, 2000, by Edmund Stump of United States Antarctic Program (USAP); he suggested the name because of the skewed form of the spur.
This article incorporates public domain material from the United States Geological Survey document "Contortion Spur" (content from the Geographic Names Information System).
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