A substantial proportion (23-69%) of concavo-convex particles deposited from experimental turbidity currents assumed concave up or standing on end positions. The proportion was largest for the high concentration flows. Similar orientations are observed in graded beds in the Ventura basin, California and elsewhere: such orientations cannot be produced in sediments moved by traction (for example, deep ocean currents).

First Page Preview

First page PDF preview
You do not currently have access to this article.