Abstract
Summary The study of 13 basin plains in the Western N Atlantic Ocean, the Caribbean Sea and the Mediterranean Sea has revealed a number of factors that control basin-plain filling. Basin plains are strongly dominated by turbidity currents which enter the basins mostly from canyon mouths. Such turbidity currents are little affected by channelization, and erosion of pre-existing turbidites is of minor importance. In order to maintain a basin plain, occasional ‘giant events’ are required, i.e. turbidity currents which flow across and cover the entire basin. The two main factors that control sand-layer geometry in basin plains are (1) the arrangement of entry points around the edge of the plain and (2) the ratio of the area of the drainage basin to the area of the basin-plain floor.
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