. The Earth beneath the sea : History . 34°00 doodo 33°40' Fig. 16. Floor of the yanta Monica Basin. (After Emery, 1960.) basin aprons have gradients between 1 : 70 and 1 : 30 in their upper portions but, in the lower parts, the gradients range from 1 : 800 to 1 : 100. The basin plains fulfill the definition of abyssal plains in having gradients less than 1 : 1000 and in some cases the gradients are as low as 1 : 6000. The basin aprons and basin plains slope away from the obvious sources of sediments and are apparently fed by sediment distributed through the deep-sea channels associated with t
. The Earth beneath the sea : History . 34°00 doodo 33°40' Fig. 16. Floor of the yanta Monica Basin. (After Emery, 1960.) basin aprons have gradients between 1 : 70 and 1 : 30 in their upper portions but, in the lower parts, the gradients range from 1 : 800 to 1 : 100. The basin plains fulfill the definition of abyssal plains in having gradients less than 1 : 1000 and in some cases the gradients are as low as 1 : 6000. The basin aprons and basin plains slope away from the obvious sources of sediments and are apparently fed by sediment distributed through the deep-sea channels associated with the many continental-slope submarine canyons. The distribu- tion of sediments in this manner has been well demonstrated by the work of Gorsline and Emery (1959) in their study of the San Diego Basin. 3. Trench Abyssal Plains A trench abyssal plain is an abyssal plain lying in the bottom of a deep-sea trench. Since the initial discovery of the Puerto Rico Trench Abyssal Plain in
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom
