on Antarctic Names (US-ACAN) for personnel from the Eastern Group of U.S. Navy Operation HIGHJUMP: Photographer's Mates R.M. Simpson and T.W. Baker, respectively. Operation HIGHJUMP obtained aerial photographs of Thurston Island and adjacent coastal areas in 1946-47. Snow-covered Harrison Nunatak stands south of Savage Glacier. It was discovered on helicopter flights from the USS Burton Island (AGB-1) and USS Glacier (AGB-4) during the U.S. Navy Bellingshausen Sea Expedition in February 1960, and was named by US-ACAN for Henry T. Harrison Jr., a U.S. Weather Bureau meteorologist with the Byrd Antarctic Expedition in 1928–30. The southeast point of the island is Cape Walker. South coast On the south side of the island are King Peninsula, Williamson Peninsula, Evans Point, and Von der Wall Point, projecting into Peacock Sound. Williamson Peninsula is bordered by Schwartz Cove and O'Dowd Cove. Shelton Head is a headland marked by exposed rock, located west of Long Glacier on the south coast of Thurston Island. It was mapped by the United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1960–66, and named by US-ACAN for John A. Shelton meteorologist at Byrd Station, 1963-64. Prickly Ridge is a rounded ice-covered ridge west of Shelton Head on the south side of Thurston Island. The descriptive name was given by the Advisory Committee on Antarctic Names (US-ACAN); small dispersed nunataks rise above the ice surface, giving the feature a prickly appearance. Belknap Nunatak, an ice-covered spur, is the largest outcrop on the ridge. It was mapped by the USGS from surveys and from U.S. Navy air photos, 1960–66, and named by US-ACAN for William Belknap, a field assistant at Byrd Station, 1964–65. See also Composite Antarctic Gazetteer List of Antarctic and sub-Antarctic islands List of Antarctic islands south of 60° S Scientific Committee on Antarctic Research Territorial claims in Antarctica Further reading International Symposium on Antarctic Earth Sciences 5th : 1987, Geological Evolution of Antarctica, Cambridge, England, P 401 A.M. GRUNO, D. V. Kent, I. W. D. Dalzeil, New Paleomagnetic Data From Thurston Island' Implications for the Tectonics of West Antarctica and Weddell Sea Opening, JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 96, NO. Bll, PAGES 17,935-17,954, OCTOBER 10, 1991 References Islands of Ellsworth Land