COMPOSITE GAZETTEER OF ANTARCTICA

off Cape Legoupil, Trinity Peninsula (including all the islands from Wisconsin Islands in the NE to Estay Rock in the SW, but not Demas Rocks), were roughly charted by FAE, 1837-40, during two approaches to the coast on 27-28 February 1838. There was a plotting error in the track of one of these two approaches resulting in the duplication of a length of coastline of c. 13' of longitude in extent, between Gourdin Island and Cape Ducorps. For this reason, between Siffrey Point and Coupvent Point, a single series of features appeared twice on the original chart and were named twice (d'Urville, 1838, map following p.1170). It is now clear that the names Roche Lafarge and Roche Coupvent both refer to the feature now named Lafarge Rocks (q.v.), and the names Île Casy and Roche Duroch to Casy Island (q.v.). Formerly, however, because of a W-ward error in plotting, the names Roche Coupvent and Roche Duroch were identified with individual islands of the present group. This entry lists synonyms that undoubtedly apply to the group, together with those that have been incorrectly thought to apply to it or part of it. Roche Coupvent (d'Urville, 1838, map following p.1170; Vincendon-Dumoulin, atlas, 1847, Pl. 8). Roche Duroch, after Lieut. de Vaisseau Joseph-Antoine Duroch (b. 1812), of the French Navy, an officer in Astrolabe of FAE (d'Urville, 1838, map following p.1170; Vincendon-Dumoulin, 1838, p.8). Roca Coupvent (Spain. DH chart 458, 1861). Roca Duroch (Spain. DH chart 458, 1861; Chile. IHA, 1974, p.108). Coupvent Rock, Duroch Rock (BA chart 3205, 1.vi.1901; BA, 1948, p.185). Isla Duroch (Riso Patron S., 1908, end map). Kap Duroch (Nordenskjöld, 1911b, p.75). Rocher Coupvent, Rocher Duroch (Charcot, 1912, Pl. 1). Coupvent Skj. (HA chart, 1928). Durock [sic] Rock (USHO, 1943, p.109). The islands were surveyed by FIDS from "Hope Bay" in 1946. Duroch Islets (BA chart 3205, 23.ix.1949; APC, 1955, p.9). Islotes Duroch (Argentina. MM, 1953, p.242; Pierrou, 1970, p.329). Rocas Duroch y Coupvent, referring to rejected names (Argentina. MM, 1953, p.331). The islands were photographed from the air by FIDASE, 1956-57. Islas Duroch (Argentina. MM, 1957a, p.92). Duroch Islands (USOO chart 6650, 1963; APC, 1964, p.3; BAS 250 sheet SP 21-22/13, 1-DOS 1974).

Group of islands and rocks which extend over an area of about 3 mi, centering about 1 mi NW of Cape Legoupil, off the N coast of Trinity Peninsula. Discovered by a French expedition under Capt. Jules Dumont d'Urville, 1837-40, who gave the name "Rocher Duroch" to one of the largest islands in the group. The FIDS, which charted the islands in 1946, recommended that the name Duroch be extended to include the entire group of islands. Named for Ensign Joseph Duroch of d'Urville's expedition ship, the Astrolabe.

Descubierta por la Expedición Antártica Francesa al mando del comandante Jules Dumont D'Urville en 1837-1840, quien nombró relieves entre el grupo de roca Duroch y roca Coupvent. El FIDS cartografió el islote en 1946, encontraron que el grupo no podía dividirse satisfactoriamente en 2 partes y que un nombre individual para los islotes era necesario. La actual descripción es de acuerdo a FIDS pues el nombre Duroch incluyó el grupo entero de islotes. Su nombre recuerda al alférez Joseph Duroch, del buque "Astrolabe" de la expedición. Roca que se extiende en un área de 3 millas, cuyo centro está a 1 milla al NW del cabo Legoupil, al NW de la costa de la península Luis Felipe.