<P> The backshore area of a beach extends from the limit of high water foam lines to dunes or extreme inland limit of the beach . It is only affected by waves during exceptional high tides or severe storms . </P> <P> Sediments in this area are well - sorted and well - rounded . Its grain sizes are mainly coarse sand and medium sand, which are larger than that in littoral barrier dune. The sedimentary structures include parallel bedding and low - angle cross-bedding . </P>

What are the essential features of the backshore
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