▁will ▁carry ▁an ▁increased ▁load ▁of ▁sed iment ▁and ▁organ ic ▁matter ▁in ▁susp ension . ▁On ▁sand y ▁be aches , ▁the ▁tur bul ent ▁back w ash ▁of ▁destruct ive ▁waves ▁removes ▁material ▁forming ▁a ▁g ently ▁s lop ing ▁beach . ▁On ▁p eb ble ▁and ▁sh ing le ▁be aches ▁the ▁sw ash ▁is ▁diss ip ated ▁more ▁quickly ▁because ▁the ▁large ▁particle ▁size ▁allows ▁greater ▁per col ation , ▁thereby ▁reducing ▁the ▁power ▁of ▁the ▁back w ash , ▁and ▁the ▁beach ▁remains ▁ste ep . ▁Comp act ed ▁fine ▁sed iments ▁will ▁form ▁a ▁smooth ▁beach ▁surface ▁that ▁res ists ▁wind ▁and ▁water ▁er os ion . ▁ ▁During ▁hot ▁calm ▁seasons , ▁a ▁cr ust ▁may ▁form ▁on ▁the ▁surface ▁of ▁ocean ▁be aches ▁as ▁the ▁heat ▁of ▁the ▁sun ▁ev apor ates ▁the ▁water ▁leaving ▁the ▁salt ▁which ▁cry st all ises ▁around ▁the ▁sand ▁particles . ▁ ▁This ▁cr ust ▁forms ▁an ▁additional ▁protect ive ▁layer ▁that ▁res ists ▁wind ▁er os ion ▁unless ▁dist urbed ▁by ▁animals ▁or ▁dissol ved ▁by ▁the ▁adv ancing ▁t ide . ▁C us ps ▁and ▁horn s ▁form ▁where ▁incoming ▁waves ▁divide , ▁depos iting ▁sand ▁as ▁horn s ▁and ▁sc our ing ▁out ▁sand ▁to ▁form ▁c us ps . ▁This ▁forms ▁the ▁une ven ▁face ▁on ▁some ▁sand ▁sh or elines . ▁White ▁sand ▁be aches ▁look ▁white ▁because ▁the ▁quart z ▁or ▁er oded ▁lim estone ▁in ▁the ▁sand ▁reflect s ▁or ▁sc at