▁of ▁Rod in ia . ▁The ▁ocean ▁began ▁to ▁close ▁around ▁ 7 3 0 ▁million ▁years ▁ago ▁with ▁east ward ▁sub du ction ▁of ▁the ▁T ile m si ▁arc , ▁which ▁was ▁acc ret ed ▁against ▁the ▁Hog gar ▁region ▁of ▁the ▁Sah aran ▁Met ac rat on . ▁The ▁western ▁part ▁of ▁the ▁Hog gar ▁mass if ▁is ▁made ▁of ▁material ▁from ▁the ▁Ph arus ian ▁Ocean ▁including ▁ocean ic ▁bas al ts , ▁arc ▁vol can ic ▁and ▁sed iment ary ▁rocks ▁and ▁sed iments ▁that ▁were ▁shed ▁into ▁the ▁Ph arus ian ▁Ocean ▁by ▁the ▁West ▁African ▁cr aton ▁and ▁the ▁eastern ▁Hog gar . ▁Cl os ure ▁was ▁completed ▁when ▁the ▁West ▁African ▁and ▁Sah aran ▁cr at ons ▁coll ided ▁around ▁ 6 3 5 ▁million ▁years ▁ago ▁at ▁the ▁start ▁of ▁the ▁Pan - A fr ican ▁or ogen y . ▁ ▁Southern ▁extension ▁The ▁Go i ás ▁Ocean , ▁lying ▁to ▁the ▁south west ▁between ▁the ▁Amazon ian ▁cr aton ▁and ▁the ▁Congo ▁cr aton , ▁extended ▁into ▁the ▁Ph arus ian ▁Ocean . ▁The ▁Go i ás ▁Ocean ▁closed ▁during ▁the ▁final ▁phases ▁of ▁formation ▁of ▁West ▁G ond w ana . ▁The ▁southern ▁portion ▁of ▁the ▁Trans ▁Brazil ian ▁Line ament ▁( T BL ) ▁marks ▁the ▁s uture ▁zone ▁of ▁this ▁closure , ▁while ▁the ▁northern ▁Bor bor ema ▁portion ▁of ▁the ▁T BL ▁and ▁the ▁Trans - S ah aran ▁B elt , ▁running ▁from ▁Al ger ia ▁to ▁Ben