Current · Top of a bed, Cross section

Asymmetric (current) ripples

Small ripples with a gentle upstream (stoss) side and a steeper downstream (lee) side.

How it forms

One-way currents, such as rivers or wind, in the lower flow regime.

Typical setting

Rivers and other one-way currents

Way up

Ripple troughs are rounded and crests are sharp or truncated.

Flow direction

Yes. The steep side faces downcurrent.

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