ripple mark

On the stream bed ripple marks may be seen.

Sheets of ripple marks can be seen on some of the strata, confirming the shallow-sea environment.

He sat on white sand that reached beyond sight in graceful ripple marks.

The sinusoidal high points of the ripple marks may lend itself to the formation of the trackways.

There are also immense potholes and ripple marks, much larger than those found on ordinary rivers.

Current ripple marks - will have the short side of the ripple pointing down stream.

Symmetrical ripple marks - flow is perpendicular to the ridge crest.

This creates ripple marks with pointed crests and rounded troughs, which aren't inclined more to a certain direction.

Asymmetrical ripple marks - These are created by a one way current, for example in a river, or the wind in a desert.

In some examples it has a corrugated surface of ripple marks.