Vine, A. C., 43, 110 Washington, H. S., 113 Wirshup, M., vii Wiseman, J. H. D., 12, 38, 113 Woollard, G. P., 43, 110 Worthington, L. V., 50, 113 Worzel, J. L., vii, 36, 43, 52, 65, 76, 109, 110, 112, 113 Wuenschel, P. C., 80, 81, 112 Wüst, G., 5, 12, 22, 50, 57, 98, 112, 113 Zeigler, J. M., 25, 60, 113 SUBJECT INDEX Abyssal floor, 1, 15, 55 abyssal gaps, 1, 15, 66 abyssal hills, 1, 15, 55, 61 abyssal plains, 1, 15, 55 mid-ocean canyons, 1, 15, 66 Abyssal-floor topography, origin of, 74 Abyssal gaps definition, 66 general, 1, 66 Theta Gap, 66, 72, 73, 74 Vema Gap 58, 66, 72, 74 Abyssal hills, 1, 61 definition, 61 distribution of, 61, 63 origin of, 65 PDR records of, 38 sub-bottom echos, 105 Abyssal plains Balearic Abyssal Plain, 57 Bay of Bengal, abyssal plain in, 55 Biscay Abyssal Plain, 56, 57, 60 Blake-Bahama Abyssal Plain, 56, 57, 58, 59 Canary Abyssal Plain, 56, 61 Cape Verde Abyssal Plain, 57, 61 Cayman (Trench) Abyssal Plain, 56, 60 definition, 61 discovery of, 55 distribution of, 61, 63 general, 1, 15, 53 Hatteras Abyssal Plain, 56, 57, 58 Hispaniola-Caicos Abyssal Plain, 60, 65 Horseshoe Abyssal Plain, 57, 61 Iberia Abyssal Plain, 56, 57, 61 Madeira Abyssal Plain, 56, 61 Nares Abyssal Plain, 56, 57, 59 Newfoundland Abyssal Plain, 56 nomenclature, 55 Old Bahama Abyssal Plain, 60 Puerto Rico (Trench) Abyssal Plain, 56, 60 Sohm Abyssal Plain, 55, 57, 71, 72, 74 Tagus Abyssal Plain, 56, 57 Weddell Sea, abyssal plain in, 55 African rift valleys, 103, 107 ALBATROSS III, Research Vessel, vii Ampere Seamount, 59, 78 Andros well, 47, 48 Anegada Passage, 36 Antilles Outer Ridge, 32, 33, 36, 52, 53, 59, 60 Army Map Service, 5 Atlantis-Plato-Great Meteor Seamount Group, 98 ATLANTIS Research Vessel, vii, 7, 8, 79 Atlantis Seamount, 98 Axis of maximum depth, North Atlantic Ocean, 41, 63, 96 Azores Plateau, 97 Azores-Gibraltar Ridge, 98 Bahamas, 33-36, 47 Banquereau Bank, 24 Basalt, 75, 79, 99 "Basins and deeps", 11 Basins Cape Verde, 12 Guiana, 12 Iberia, 12 Labrador, 12 Nares, 56 Newfoundland, 12, 56 North America, 12 North Canary, 12 South Canary, 12 West Europe, 12 Bay of Biscay, 17, 56, 60 Tertiary outcrops, 49 Beaches, ancient submerged, 41, 42 Bell Telephone Laboratories, vii Benches, 1 Bahamas, 34, 35, 49 Bay of Biscay, 49 Blake Plateau, 33, 47-49 Cape Hatteras, 46-48 Georges Bank, 43, 46 Gibraltar, 37, 38 Puerto Rico, 36 Bermuda Apron, 75, 77, 81 Bermuda Pedestal, 75, 77 Bermuda Plateau, 75, 81