Bedrock core bar Position: In-channel   Form Elongate bedrock ridge over which sediments have been draped and colonised by...

Boulder mound Position: In-channel   Form Linguoid shaped boulder feature with a convex surface cross-section. Comprise a cluster of...

Island Position: In-channel   Form Vegetated mid-channel bar. Can be emergent at bankfull stage. Generally compound forms, comprising an...

Expansion bar Position: In-channel   Form Coarse-grained (up to boulder size) mid-channel bar with a fan-shaped planform. Streamlined ridge...

Diagonal bar (diamond bar) Position: In-channel   Form Mid-channel unit bar, oriented diagonally to banks in gravel- and mixed-bed...

Transverse bar (linguoid bar) Position: In-channel   Form Mid-channel unit bar, oriented perpendicular to flow, generally found at points...

Longitudinal bar (median bar) Position: In-channel   Form Mid-channel, elongate, teardrop-shaped unit bar, formed in flow direction in gravel-...

Riffle and pool Position: In-channel   Form Riffle Topographic highs along an undulating reach-scale longitudinal profile. They occur at...

Pot hole Position: In-channel   Form Deep, circular scour features occur in bedrock.   Process description Pot holes are sculpted...

Plunge pool Position: In-channel   Form Deep, circular, scour feature formed at the base of a bedrock step.  ...