▁re ef s ▁are ▁various ly ▁designated ▁by ▁other ▁studies ▁as ▁rib bon ▁and ▁at oll ▁re ef s . ▁ ▁The ▁ge ological ▁process ▁that ▁gave ▁rise ▁to ▁this ▁structure ▁has ▁been ▁attributed ▁in ▁one ▁study ▁to ▁cr ust al ▁down ▁war ping , ▁block ▁fault ing , ▁and ▁mant le ▁pl ume ▁activity ▁while ▁another ▁theory ▁attributes ▁it ▁to ▁continuous ▁sand ▁de position ▁and ▁the ▁natural ▁process ▁of ▁sed iment ation ▁leading ▁to ▁the ▁formation ▁of ▁a ▁chain ▁of ▁bar rier ▁islands ▁related ▁to ▁rising ▁sea ▁levels . ▁Another ▁theory ▁aff ir ms ▁that ▁the ▁origin ▁and ▁linear ity ▁of ▁Adam ' s ▁Bridge ▁might ▁be ▁due ▁to ▁the ▁old ▁sh or eline ▁( imp lying ▁that ▁the ▁two ▁land mass es ▁of ▁India ▁and ▁Sri ▁L anka ▁were ▁once ▁connected ) ▁from ▁which ▁sh or eline ▁cor al ▁re ef s ▁developed . ▁ ▁Another ▁study ▁attributes ▁the ▁origin ▁of ▁the ▁structure ▁to ▁long sh ore ▁dr ifting ▁curr ents ▁which ▁moved ▁in ▁an ▁ant ic lock wise ▁direction ▁in ▁the ▁north ▁and ▁clock wise ▁direction ▁in ▁the ▁south ▁of ▁R ames war am ▁and ▁T ala im ann ar . ▁The ▁sand ▁could ▁have ▁been ▁dump ed ▁in ▁a ▁linear ▁pattern ▁along ▁the ▁current ▁shadow ▁zone ▁between ▁D han ush k odi ▁and ▁T ala im ann ar ▁with ▁the ▁later ▁accum ulation ▁of ▁cor als ▁over ▁these ▁linear ▁sand ▁bodies . ▁In ▁a ▁diam etr ically ▁oppos ing ▁view , ▁another ▁group ▁of ▁ge olog ists ▁propose ▁a