The international geography . deepest spot known in the ocean is 31,610 feet or 5,269fathoms) to 16,400 feet or 2,733 fathoms below sea-level; (2) the OceanicPlateau, the vast undulating expanse from the depth of 16,400 feet up to7,500 feet, the mean level of the surface of the lithosphere, and covering54 per cent, of the surface of the Earth ; (3) the Continental Slope reachingthence to the edge of the Continental Shelf, or 660 feet below actual sea-level, and occupying 9 per cent, of the surface ; (4) the Con-tinental Plateau from the edge of the Continental Shelf to analtitude of 3,300 feet
The international geography . deepest spot known in the ocean is 31,610 feet or 5,269fathoms) to 16,400 feet or 2,733 fathoms below sea-level; (2) the OceanicPlateau, the vast undulating expanse from the depth of 16,400 feet up to7,500 feet, the mean level of the surface of the lithosphere, and covering54 per cent, of the surface of the Earth ; (3) the Continental Slope reachingthence to the edge of the Continental Shelf, or 660 feet below actual sea-level, and occupying 9 per cent, of the surface ; (4) the Con-tinental Plateau from the edge of the Continental Shelf to analtitude of 3,300 feet, or 28 per cent, of the surface ; and (5) theCulminating Area comprising the 6 per cent, of surface above3,300 feet. The Oceanic Plateau, although more gentle in theoutline of its forms than the other divisions of the lithosphere,is by no means featureless. There are minv broad rises whichsubdivide the oceanic depths without approaching the surface, Feet30CXX>i 10000 ^P^.^V-SE V3f^(L*N0tiSEAl §SOhet. Fig. ?The Hypsogmphic Ci Adapted from thai of Professor Hermann Wagner. but frequently forming the foundations whence more abrupt eminencestower upwards into islands ; and in some places these abrupt heights riseeven from the deeper parts of the ocean bed. The Continental Plateau may be conveniently subdivided into theC) ithiental Shelf, Depressed Lands. Lowlands, Uplands and Highlands\\h ch merge in the Culminating Area. The Continental Shelf slopes verygently from the coast down to about 100 fathoms or 200 metres (6od or060 feet). In some places, such as the west coast of South America 4-8 The International Geography or of Africa, it is only a few miles wide; but in others, , offnorth-western Europe and south-eastern South America, it stretchesfor several hundred miles from land. It unites all the large continentalislands to their nearest continent, with the exception of Madagascar,New Zealand, and Celebes. Sailors speak of this zone of shallow seaa
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgeography, bookyear19
