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PLATE XCVIIL THE PINNACLED ICE OF M'MURDO SOUND. 



FIG. 1 (Map B). From a photograph by L. C. BERNACCHI (Be. 73, ^-plate), Feb. 8, 

 1902; taken on the old weathered glacier tongue known as the "Pinnacled 

 Ice " of M'Murdo Sound. 



FIG. 2 (Map B). From a photograph by R. W. SKELTON (Sk. 93, ^-plate), Feb. 8, 

 1902 ; showing the Pinnacled Ice of M'Murdo Sound, and Dailey Islands 

 in the distance. 



At the head of M'Murdo Sound, on the western side, there is an immense 

 quantity of morainic material on stagnant but floating glacier-ice. The moraines 

 occur in long trains of cones which often rise 50 feet above the level of the ice. 

 Some of the ice is apparently an overflow from Ross's Barrier Sheet ; some in 

 Discovery Gulf, carrying much rock and organic debris, is discharged by Kcettlitz 

 Glacier, and runs northward for 20 miles or more. 



In lying thus exposed to the sun of countless summers, the morainic material 

 has eaten into the disintegrating ice, leaving it in the fantastic shapes from which 

 it has received its name. See also Plates XCVI., XCVIL, XCIX., and C. 



