GEOGRAPHIC NAMES OF ANTARCTICA 



pansion in the Pacific and the Antarctic. Not 

 adopted: Cape Poindexter, Cape Reynolds. 



REYNOLDS TROUGH: low trough about 6 mi. 

 wide and 65 mi. long, extending WSW. from the 

 SW. end of Paulding Bay, and situated between a 

 low, ice-covered ridge on the N. and a moderately 

 steep, ice-covered escarpment of the interior pla- 

 teau to the S., close behind the E. end of Sabrina 

 Coast; centering in about 66°55'S., 121°00'E. The 

 trough is marked by an elongated series of promi- 

 nent meltwater ponds along the lower end of its S. 

 flank, and except for its seaward end close S. of 

 Cape Southard, the trough is relatively free from 

 crevasses as it rises gradually westward to the con- 

 tinental ice slopes. Delineated from aerial photo- 

 graphs taken by USN Op. Hjp., 1946-47, and named 

 by the US-ACAN for Ens. Allan J. Reynolds, USN, 

 navigator of one of the three USN Op. Hjp. crews 

 which completed trimetrogon photographic cover- 

 age of the major portion of the Antarctic coast be- 

 tween 15° and 165°, east longitude. 



REX, MOUNT: mountain about 10,500 ft. in el., 

 standing E. of Mt. Peterson in the Ellsworth High- 

 land; in about 74°57'S., 76°55'W. Disc, by the 

 RARE, 1947-48, under Ronne, who named this 

 feature for Lt. Cdr. Daniel F. Rex, USN, of the Of- 

 fice of Naval Research, who made important con- 

 tributions to the planning of the scientific research 

 program and the equipment of the expedition. 

 Not adopted: Mount Daniel Rex. 



RHAMNUS, MOUNT: mountain, about 2,900 ft. 

 in el., which lies 2 mi. NE. of Mt. Nemesis on the 

 N. side of Neny Fjord, Palmer Pen.; in 68°11'S., 

 66°50'W. Seen from the W. it appears as a mainly 

 snow-covered pyramid. First surveyed in 1936 by 

 the BGLE under Rymill. It was resurveyed in 

 1947 by the FIDS, who applied the name. The 

 name Mount Rhamnus derives from association 

 with Mt. Nemesis. According to the mythological 

 story, the Greek goddess Nemesis had a celebrated 

 sanctuary at Rhamnus in Attica. Not adopted: 

 Pyramid Mountain, Pyramid Peak. 



Rhino Horn Rock: see Rhino Rock. 



RHINO ROCK: prominent black rock with steep 

 sides rising to about 2,300 ft. in el., situated about 

 5 mi. SSW. of Cape Rymill on the E. coast of 

 Palmer Pen.; in 69°34'S., 62°32'W. It was named 

 Rhino Horn Rock for its suggestive appearance by 

 members of the East Base of the USAS who charted 

 the area on land and from the air in 1940, but the 

 name has been shortened to Rhino Rock. Not 

 adopted : Rhino Horn Rock. 



RHO ISLETS: group of small islets and rocks 

 which lie immediately N. of Lambda I. and mark 

 the NW. extremity of the Melchior Is., Palmer 

 Arch.; in 64°17'S., 63°00'W. The name Rho, de- 

 rived from the 17th letter of the Greek alphabet, 

 appears to have been first used on a 1946 Argentine 

 govt, chart following surveys of these islets by Arg. 

 expeditions in 1942 and 1943. Not adopted: 

 Islotes Boulier [Spanish] . 



RHYOLITE ISLETS: group of islets and rocks, 

 which extend in an E.-W. direction about 4 mi., 

 lying about 9 mi. SE. of Powder It. and close off 

 the N. side of the mouth of Eureka Gl. in George 

 VI Sound; in 69°40'S., 68°35'W. Surveyed in 1948 

 by the FIDS, and so named by them because the 

 islets are largely composed of rhyolite. 



RICHARD BLACK COAST: that portion of the 

 E. coast of Palmer Pen. extending from Cape Boggs, 

 in 70°33'S., 61°23'W., to Cape Mackintosh, in 

 72°53'S., 60°03'W. This coast was disc, and 

 photographed from the air by members of East 

 Base of the USAD, 1939-41, on a flight, Dec. 30, 

 1940. The most southerly point reached was 

 Wright Inlet in 74°05'S., but features as far S. as 

 Bowman Pen. are identifiable in the aerial photo- 

 graphs taken on the fiight. Named for Cdr. Rich- 

 ard B. Black, USNR, leader of the December 30 

 fiight and commanding officer of the East Base. 



RICHARDSON, MOUNT: peak on the SE. cor- 

 ner of the main massif of the Fosdick Mtns., just 

 W. of Reece Pass, in the Edsel Ford Ranges of Marie 

 Byrd Land; in about 76°32'S., 144°38'W. Disc, on 

 aerial fiights from West Base of the USAS in 1940 

 and named for Harrison H. Richardson, meteor- 

 ological observer of the Edsel Ford Mountains Bio- 

 logical Party, which visited this area in November- 

 December 1940. 



Richard Russell, Mount: see Russell, Mount. 



Richthofen Sound: see Richthofen Valley. 



RICHTHOFEN VALLEY: glacier-filled valley 

 about 4 mi. wide at its mouth and extending W. for 

 an undetermined distance, at the N. side of Cape 

 McCarroll on the E. coast of Palmer Pen.; in about 

 65°58'S., 62°45'W. Disc, in 1902 by the SwedAE 

 under Nordenskjold, who named it for Baron Fer- 

 dinand von Richthofen, German geographer and 

 geologist. Not adopted: Richthofen Sound. 



RIDGE ISLAND : ridge-shaped island about 6 mi. 

 long, in a NE.-SW. direction, and 1 mi. wide, lying 

 3 mi. N. of Horseshoe I. in the center of Bourgeois 

 Fjord, off the W. coast of Palmer Pen.; in 67°42'S., 

 67°06'W. Disc, and named by the BGLE, 1934-37, 

 under Rymill. 



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