172 INDEX 



Grover, N. C, 166 



Guam Island, 77 



Gulf of Bothnia, 34, 39, 40, 42, 44 



Gulf of Finland, 39 



Gulf of Maine, 153 



Gulf of Mexico 



thickness of shelf sediments under, in 



weak tides of, 103 

 Gulf Stream, cause of giant eddies, 104 

 "Gun," invented by C. S. Piggot, 12 

 Gutenberg, B., 20, 21, 22, 165 



JTlawaii Island, 52 



gravity anomalies in, 63 ff 

 Hawaiian Islands, map of, 18, 19, 50 

 Hayford, J. F., investigator of the earth's 



figure, 32, 81 

 Heat of the earth 



inherited, 45 



radioactive, 45 



volcanic, 56 

 "Heavy water," 137, 141 

 Heiskanen, W., investigator of the 



earth's figure, 32, 81 

 Helsinki (Helsingfors), 39 

 Heron Island, bore-hole at, 66 

 Hess, H. H., on geology of the West In- 

 dies, 84, 95, 99, 165 

 Himalayas 



date of formation of, 92 



in isostatic balance, 93 



origin of, 88 



structure of, 92 



upheaval of, 92 ff 

 Hirvonen, R. A., on gravity in Finland, 



42 

 Horizontal displacement of the sialic 



crust, 47, 92, 97 

 Howard, C. S., 166 

 Hudson Bay, 8, 44 

 Hudson Canyon, 114, 116 ff 

 Hudson River, relation of to "Channel" 



and Canyon, 115, 154 

 Hudson (shelf) "Channel," 114 

 Hydraulic head, 133 

 Hydraulic mean depth, 150 



Ice-caps, Canadian, 44 



connected with eustatic shifts of sea- 

 level, 70 

 dimensions of, 34, 131 



Ice-caps, Fennoscandian, 34 ff 



flexing (basining) the earth's crust, 



34 ff 



melting of, 34, 37, 136 

 times of duration, 137 

 India, submarine canyons off coast of, 



134 

 Indian Ocean, 21, 45 



sialic rock under, 23 

 Individuality of density-current preserved, 



140, 143, 146 ff, 162 

 Indus River, relation to Indus canyon, 



124, 154 

 Interglacial stages, 70, 72 

 "Intermediate" layer of the earth's crust, 



*7> 23 

 Iron core of the earth, 16 

 Island belts, 80 



Islands, thalassic or deep-sea, 9, 48, 50 ff 

 Isobases, 37, 39 

 Isobath, 9, 115 



Isostatic adjustment (flow in depth), 32 

 Isostatic anomalies. See Anomalies of 



gravity 

 Isostasy, 27, 31, 45, 81 



J aggar, T. A. See Figure 23 



Jaluit atoll, a test of prolonged crustal 

 stability, 66 



Japan, Sea of, 91 



Japan Deep, 7 



Japanese mountain-arc, 91 



Java Deep, 82, 91 



Java Island, 89 



Johnson, D. W., explanation of subma- 

 rine valleys by, 131 ff, 166 



Jungfrau Mountain, 92 



J\_ei Island, deformed rocks in, 89 



Kelch, H. T., 145 



Kerguelen Island, 50 



Kilauea, volcanic vent at, 56 



Knapp, R. T., 141 



Kolumadulu atoll, test of prolonged 



crustal stability, 68 

 Krakatoa Island, eviscerated, 53, 54 

 Kuenen, P. H., experiments by, 148 ff, 



153, 166 

 Kukkamaki, T. J., on changes of level 



in Finland, 39 



