bench gravel

bench gravel

[′bench ‚grav·əl]
(geology)
Gravel beds found on the sides of valleys above the present stream bottoms, representing parts of the bed of the stream when it was at a higher level.
References in periodicals archive ?
Fi and 50cm total length of 12m plastic SN 8 on the bench gravel + front walls prefabricated - 4 pcs.