Sentinel Buttress
Sentinel Buttress (64°4′S 58°8′W) is a prominent crag containing a volcanic breccia sequence, rising to 535 m east of Palisade Nunatak at the head of Rohss Bay, James Ross Island. So named by the United Kingdom Antarctic Place-Names Committee (UK-APC) in 1987 from its commanding position in the area.
This article incorporates public domain material from the United States Geological Survey document: "Sentinel Buttress". (content from the Geographic Names Information System) 
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