By V.M. Litvin
The research of the topography and constitution of the sea ground is among the most vital levels in ascertaining the geological constitution and historical past of improvement of the Earth's oceanic crust. This, in its flip, presents a method for practical, scientifically-substantiated prospecting, exploration and improvement of the mineral assets of the sea. The Atlantic Ocean has been geologically and geophysically studied to an exceptional quantity and plenty of years of investigating its flooring have printed the legislation governing the constitution of the key kinds of its submarine reduction (e. g. , the continental shelf, the continental slope, the transition zones, the sea mattress, and the Mid-Oceanic Ridge). the fundamental positive factors of the Earth's oceanic crust constitution, anomalous geophysical fields, and the thickness and constitution of its sedimentary conceal have additionally been studied. in line with the investigations of the Atlantic Ocean flooring and its surrounding continents, the shortly favourite thought of latest worldwide tectonics has seemed. a number of works dedicated to the result of geomorphological, geolog ical, and geophysical reports of the Atlantic Ocean ground have seemed. within the U. S. S. R. , such summarizing works because the Geomorphology of the Atlantic Ocean ground , kinds of backside Sediments of the Atlantic Ocean , The Geology of the Atlantic Ocean , and, a little past, Geophysical stories of the Earth's Crust constitution within the Atlantic Ocean , were published.
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Extra resources for The Morphostructure of the Atlantic Ocean Floor: Its Development in the Meso-Cenozoic
The outer slopes of the rise are gentle but their gradient increases considerably with depth. Bathyography of the Atlantic Ocean Floor 21 The Iceland Plateau, located between Iceland and Jan Mayen, is a rolling plain with depths of 1800-2200 m, diversified by rather rare hills and scarps orientated in the north-east direction. On the eastern side of the plateau, to the south of Jan Mayen, stretches the block Jan Mayen Ridge, with depths over it ranging from 600 to 900 m. Its southern extremity is broken up into a number of asymmetric blocks.
Further to the south abyssal plains of smaller size are found, Bathyography of the Atlantic Ocean Floor 33 separated by zones of rolling floor. The eastern part of the Brazilian Basin is occupied by a wide zone of abyssal hills 300-500 m high, elongated in the form of ridges to the north. There is a large number of seamounts on the floor of the Brazilian Basin, some of them scattered at random but the majority being concentrated along the latitudinal zones of 8°30' and 13° South and on the extensions of the northern and southern slopes of the Abrolhos Bank.
These crests are formed by chains of asymmetric blocks more than 500 m high. At latitudes 57° and 55° North the rift zone is cut by transverse depressions along which a relatively small displacement of rift structures is seen. The flanks of the southern part of the Reykjanes Ridge are situated at depths ranging from 2200 to 2800 m. Their surface is represented by a continuous alternation of blocks stretching along the strike of the ridge. Individual conic seamounts more than 1000 m high are also encountered.
The Morphostructure of the Atlantic Ocean Floor: Its Development in the Meso-Cenozoic by V.M. Litvin