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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Eduncle
Hi Srikanta,
here is your answer for the query
River bench is a narrow terrace which are gently plunging which is bounded by steeply plunging scarps or other inclined surfaces by above and below.
So main difference - bench is a narrow long terrace land which is mostly bounded by inclined surfaces from above and below these inclined surfaces may be scarps, scarp is a part of River terraces.
River terraces are more inclined and small geomorphic features with respect to benches.