Cape Purvis
Cape Purvis ({{coord|63|35|S|55|58|W|display=inline,title}}) is a cape forming the south extremity of Dundee Island, off the north tip of Antarctic Peninsula.{{Cite web |date=1 January 1963 |title=Cape Purvis |url=https://geonames.usgs.gov/apex/f?p=gnispq:5:::NO::P5_ANTAR_ID:12197 |url-status=dead |archive-url=https://web.archive.org/web/20210602231004/https://geonames.usgs.gov/apex/f?p=gnispq:5:::NO::P5_ANTAR_ID:12197 |archive-date=2 June 2021 |website=U.S. Geological Survey}} Its topography is that of a promontory which forms a mesa. The rest of the island is smooth.
Composition
The only large, accessible portion of Cape Purvis is at its southwest.{{Cite journal |doi = 10.1017/S0954102006000447|title = The Cape Purvis volcano, Dundee Island (northern Antarctic Peninsula): Late Pleistocene age, eruptive processes and implications for a glacial palaeoenvironment|journal = Antarctic Science|volume = 18|issue = 3|pages = 399–408|year = 2006|last1 = Smellie|first1 = J.L.|last2 = McIntosh|first2 = W.C.|last3 = Esser|first3 = R.|last4 = Fretwell|first4 = P.|bibcode = 2006AntSc..18..399S}} It is composed of recently formed volcanic rock of the James Ross Island Volcanic Group.{{cite web|url=http://nora.nerc.ac.uk/id/eprint/506743/1/BAS%20GEOMAP%202,%20sheet%205%20-%20Geological%20map%20of%20James%20Ross%20Island%20-%20I%20-%20James%20Ross%20Island%20volcanic%20group.pdf|title=Geological Map of James Ross Island|accessdate=2020-03-23}} Cape Purvis is described as a basalt tuya in the Encyclopedia of Quaternary Science.{{Cite encyclopedia |year=2013 |title=GLACIAL LANDFORMS {{!}} Quaternary Vulcanism: Subglacial Landforms |encyclopedia=Encyclopedia of Quaternary Science |publisher=Elsevier |last=Smelie |first=J. L. |editor-last=Elias |editor-first=Scott A. |editor-last2 = Mock |editor-first2=Cary J. |pages=780–802 |doi=10.1016/B978-0-444-53643-3.00074-1 |isbn=978-0-444-53642-6}}
The basalts on Cape Purvis have similar composition to lavas on Paulet Island, which is 5 kilometers east of it. Said composition is relatively low in magnesium oxide but high in titanium dioxide, calcium oxide, and niobium.
Cape Purvis's snow and ice-covered summit boasts an unnamed hill at its northern edge.
Discovery
It was discovered in December 1842 by Captain James Ross, Royal Navy, and named by him for Commodore (later Rear Admiral) John B. Purvis, Royal Navy, who was of assistance to Ross' expedition. Of all islands in the James Ross Island Volcanic Group, it is the furthest north. It is also one of the youngest.
References
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Category:Headlands of the Joinville Island group
Category:Volcanoes of Graham Land
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