▁▁ ▁This ▁is ▁a ▁wide ▁zone ▁of ▁t ect onic ▁s ut uring ▁that ▁in ▁part ▁represents ▁the ▁closure ▁of ▁the ▁Pale o - As ian ▁Ocean . ▁During ▁this ▁closure ▁ab du ction ▁was ▁occurr ing ▁on ▁both ▁sides ▁of ▁the ▁ocean . ▁This ▁has ▁formed ▁s edu ction ▁related ▁Pale oz o ic ▁orth ogne iss ▁throughout ▁the ▁sequence . ▁This ▁zone ▁represents ▁the ▁largest ▁acc ret ion ary ▁origen ic ▁sequence ▁in ▁the ▁world . ▁ ▁Su - Lu ▁O ro gen ▁ ▁The ▁Su - Lu ▁O ro gen ▁( also ▁D ab ie - S ulu ▁or ▁Sul u ▁or ogen ) ▁formed ▁during ▁the ▁Mes oz o ic ▁in ▁what ▁is ▁now ▁the ▁central ▁eastern ▁coast ▁of ▁China . ▁Within ▁this ▁zone ▁are ▁exposed ▁the ▁largest ▁zone ▁of ▁ult ra high - press ure ▁ ▁met am orph ic ▁ ▁rocks ▁in ▁the ▁world . ▁These ▁originally ▁formed ▁deep ▁within ▁a ▁sub du ction ▁zone , ▁where ▁ocean ic ▁cr ust ▁from ▁the ▁South ▁China ▁Block ▁went ▁beneath ▁the ▁North ▁China ▁Block ▁during ▁the ▁Tri ass ic . ▁The ▁region ▁was ▁also ▁intr ud ed ▁by ▁gran ites ▁from ▁the ▁same ▁time ▁period . ▁ ▁Q in ling ▁D ab ie ▁ ▁The ▁Q in ling ▁D ab ie ▁represents ▁the ▁s uture ▁zone ▁between ▁the ▁North ▁and ▁South ▁China ▁cr at ons ▁in ▁the ▁Tri ass ic . ▁The ▁or ogen ic ▁bel t ▁started ▁to ▁form ▁ 2 . 5 ▁billion ▁years ▁ago ▁in ▁the