Continental rise, 1, 19, 20, 25, 26, 27, 37, 38, 40, 41 definition, 20 PDR records of, 32 tables of characteristics, 27, 41
Continental shelf, 15-28, 32-42, 107 definition, 18 structure of, 49, 51-54 submerged beaches, 42
Continental slope, 1, 15-48, 107 benches on, 41, 42-51 currents on, 50 definition, 18 geologic map of, 51 photographs of, 39 profiles of, 28, 29
Cretaceous outcrops Bahamas, 47 Blake Escarpment, 47 Caryn Seamount, 78 Georges Bank, 43
Crustal structure continental margin, 52, 53, 102, 107 Mid-Atlantic Ridge, 100, 102, 107 ocean-basin floor, 80, 81, 102, 107 trans-Atlantic structure section, 102
Currents, deep-sea bottom photographed evidence of, 39, 59, 79 scour, 50, 51, 59, 79 velocities of, 50
Deep-sea sands, 28, 35, 36, 53, 58, 59, 60, 61, 65, 74, 75, 80, 99, 106, 107
Echo sounders early sounding machines, 8 invention of, 8 Lamont-Facsimile PDR, 8, 9 NMC, 7, 8, 22, 23, 24, 31, 68 UQN-1B, 7, 8, 69
Echo soundings accuracy of, 3, 9 sources of, 3, 5, 6, 7 units employed, 12
Erosion, submarine, 23, 39, 50, 51, 74, 79, 80, 99, 105, 106, 107
Georges Bank canyons dredging, 44-45 identification of benches, 44 outcrops on, 43-44
Gulf of Maine, 17, 24, 25 sub-bottom echoes, 105
High Fractured Plateau, 1, 15, 90, 91, 94, 95, 99
Hudson Submarine Canyon, 8, 27-28, 31, 58, 72
Hydrographic Department, British Admiralty, vii, 3, 6
International Hydrographic Bureau (Monaco), vii, 3, 5, 11, 12
Lamont Geological Observatory, 3, 6, 8, 21
Lower Step, Mid-Atlantic Ridge, 1, 15, 90, 91, 94, 95, 96
Magnetic anomalies continental margin, 51, 52 Mid-Atlantic Ridge, 51, 100, 101 ocean-basin floor, 51, 65, 72 seamounts, 51
Magnetic surveys airborne, 51 ship-towed, 51
Marginal basin-outer ridge complex, 20, 36
Marginal escarpments Bay of Biscay, 19, 37 Blake, 19, 32, 35 Gulf of Mexico, 19, 33 New Zealand, 19
Marginal plateaus, 18, 32, 37 Blake Plateau, 17, 32, 47, 48, 59 Western Europe, 37
Marginal trenches, 20, 36, 53, 107 filled, 52-54 Pacific, 19, 60 Puerto Rico Trench, 17, 36, 52, 56, 60
Marginal trench-outer ridge complex, 1, 20, 36, 53
Matawan (Cretaceous) formation, 44, 45, 46
Mid-Atlantic Ridge axial profile, 96 crest provinces, 1, 84 flank provinces, 1, 95 heat flow, 103 High Fractured Plateau, 1, 90, 94, 95 limits of, 83 Lower Step, 1, 90, 94, 95 Middle Step, 1, 90, 94, 95 ocean-bottom photographs, 78, 99 origin of, 103 rocks of, 99 Rift Mountains, 1, 90, 92, 94 Rift Valley, 1, 84, 90, 91, 92, 93, 94 sediments on, 99 seismicity of, 98, 99 structure of, 81, 100, 102, 107 trilobites from, 99 type profile, 90 Upper Step, 1, 90, 94, 95