Diagonal bar (diamond bar)

Position: In-channel

 

Form

Mid-channel unit bar, oriented diagonally to banks in gravel- and mixed-bed channels. These bars commonly have an elongate, oval or rhomboid planform. Particle size typically fines down-bar. Commonly associated with a dissected riffle.

 

Process description

Formed where flow is oriented obliquely to the longitudinal axis of the bar. May indicate highly sediment charged conditions or reworking of riffles.