in an east-west direction with its eastern end terminated by the trough of the 

 transverse depression . 



Another longitudinal ridge, northwest of Guest Island, is outlined by the 

 dashed 100-fathom contour (Fig . 5) . The only soundings on this ridge were ob- 

 tained at its western end, where the ridge blends into the east wall of the trans- 

 verse depression; however, the northeast extension of the ridge was based on the 

 location of grounded icebergs reported by Byrd (1933). A large grounded iceberg 

 shown on H . O . Chart 6637 (U.S. Navy 1961) was the basis for the position of 

 another longitudinal ridge farther to the northeast off the Ruppert Coast. 



II! . BOTTOM SEDIMENTS OF THE EASTERN ROSS SEA AND 

 SULZBERGER BAY 



The Deep Freeze 61 Phleger cores taken by STATEN ISLAND in the eastern 

 Ross Sea and Sulzberger Bay are now under study by Dr .H .G.Goodell at Florida State 

 University. Preliminary field analyses of these samples indicated they are com- 

 posed of submarine glacial till . Most of the samples appeared to be uniform in 

 texture; the only noticeable exceptions have evidence of ice-rafted pebbles. 

 The field descriptions with, corresponding depth soundings of 25 STATEN ISLAND 

 cores and 6 GLACIER (TR 33, U.S. Navy Hydrogrophic Office, DEEP FREEZE I, 

 1956) cores are shown on Figure 2. 



In the GLACIER cores, the sphericity of the particles of sediment generally 

 was low, and the particles were mainly subangular to angular, some had rough, 

 polished surface texture. All were considered to be glacial marine till . Pebbles 

 and larger rock particles were found near the Ross Ice Shelf. In the GLACIER 

 samples from the deep depressions, sand-size particl6s were scarce . The highest 

 clay-size content was found at GLP-2 at 730 fathoms in the longitudinal depres- 

 sion . Rock fragments In the cores consisted of schist, slate, graywacke, quartzlte, 

 scoria, pumice, volcanic glass, fine-grained volcanic fragments, coarse-grained 

 granitic fragments, and chert . The source of these fragments was probably the 

 Edsel Ford and Rockefeller Mountains . The petrology of this landmass Is described 

 by Passel (1945), Warner (1945), and Wade (1945). 



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