Abstract

Some new thoughts are offered to explain the development of rhomboid-deltoid-shaped surface marks, occurring on marine beaches, usually called "rhomboid ripple marks." Observations on their development and 3260 measurements of their acute angles were employed. The marks--distinguished from true rhomboid beach ripples--are thought to be caused by backwash-scouring and are held to be rill marks. Another beach-surface feature, in planar view resembling the appearance of erosional ripple marks, caused by erosion and nondeposition in the intertidal zone, is also described.

First Page Preview

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