L 4 (j 
INDEX. 
Depot Nunatak, 40, 69. 
„ crevasses, 70. 
„ dolerite, 49, 50, 136, 139, and 
Plate X, Fig. 1. 
„ mudstone-lent icles, 41. 
„ sandstone in moraines, 40, 41. 
„ talus from, 78. 
„ up-thrust of morainic material, 82. 
Descent Pass, 36. 
„ hollowed granite-boulders, 87, 88. 
„ moraines seen from, 78. 
Diallage, in gabbro, 139. 
Diatoms, sea-floor along Barrier, 94. 
Differentiation, 121. 
Diorite, 139. 
„ Blue Glacier, 27, 128, and Plate IX, Fig. 3. 
„ Cathedral Rocks, 30, 36, 127, and Plate 
IX, Fig. 2. 
„ „ anal., 127. 
„ described, 125-128. 
„ King Edward VII Land, 128. 
„ Sweet Grass Creek, anal., 127. 
Diorite-gneiss, Cathedral Rocks, 125. 
‘ Discovery,’ at Cape Jones, 19 (Fig. 7). 
„ at Macquarie Island, 95. 
„ break-up of ice, 59 (Fig. 33). 
„ Soundings along Barrier, 94. 
1 Discovery ’ Expedition, geological work of, 98. 
Discovery Gulf, 70, 71. 
„ Glauber Salt, 91. 
„ kenyte in moraine, 113. 
,, rock -debris on ice, 79. 
Discovery (Mount), 7, 15, and Fig. 32 (p. 58). 
„ described, 20. 
Distances, Table of, 7. 
Distribution, of icebergs, 75. 
Dolerite, at B„ 40, 41, 45, 49, 50, 138, and Plate 
X, Fig. 5. 
„ at b 2 , 46, 51. 
„ at x, 46. 
„ Beacon Heights, 46. 
„ Cathedral Rocks, 30, 35 (Fig. 17), 
36, 53. 
„ contact with granite, 52, 138. 
„ contact with sandstone, 49-54, 138, and 
Plate X, Figs. 2-5. 
„ Cornwall, 128. 
„ Depot Nunatak, 49 (Fig. 24), 50 (Fig. 
25), 136, 139, and Plate X, Fig. 1. 
„ described, 49-54, 136—139. 
„ dredge off Balleny Islands, 3, 135, 139, 
140. 
Dolerite, Dry Valleys, 45, 46, 136-138, and Plate 
X, Figs. 2 and 4. 
„ Finger Mountain, 40 (Fig. 19), 41, 45 
(Fig. 22), 50, 51. 
,, fragments in conglomerate, 139. 
„ frost-action on, 92. 
„ Granite Harbour, 32 (Fig. 15), 33, 54, 
126, 138. 
„ gullies produced by, 92. 
„ in moraines, 11, 53, 81. 
„ Inland Forts, 42, 43, 44, 50, 53, 138, 
139, and Plate X, Fig. 3. 
„ Knob Head Mountain, 46, 47, 49, 51, 
52 (Fig. 26), 53, 137. 
„ Kukri Hills, 36, 37 (Fig. 18), 38, 52, 53 
(Fig. 27), 128, 136. 
„ Macquarie Island, 96, 109. 
„ Royal Society Range, 53, 99. 
„ Solitary Rocks, 36. 
„ South Victoria Land, 25, 49-54, 98, 99, 
101, 136-140. 
„ Terra Cotta Mountains, 47 (Fig. 23). 
„ weathered surface of, 88. 
„ with granitic patches, 138, 139, and 
Plate X, Fig. 6. 
„ formation, extent of, 53, 54, 140. 
Drift-ice, 57. 
Dry Valleys, see Plates V and VII. 
„ 70. 
„ dolerite and sandstone, 45, 46, 136, 
137, 138, and Plate X, Figs. 2 
and 4. 
„ dolerite-talus, 92. 
„ granite in moraines, 38. 
„ moraines, 78. 
Drygalski, E. von, ico-cracks, ref., 83. 
„ „ ice-fringes, ref., 61. 
„ „ Karajak ice-stream, ref., 78. 
„ „ Kryolconit, ref., 93. 
„ „ land-ice, ref., 63, 64. 
„ „ salinity of sea-ice, ref., 55. 
,, „ temperature of ice, ref., 86. 
„ „ thawing of ice, ref., 85. 
Drygalski Piedmont, 67. 
Dune-snow, 84. 
Dyke-rocks described, 27, 129-133. 
Dykes, basalt at Auckland Islands, 97. 
„ „ at Cape Adare, 17. 
„ „ at Coalman Island, 6. 
„ „ at Macquarie Island, 96. 
„ „ at Dailey Islauds, 16. 
„ dolerite at B u , 51. 
