TheCentralAsianLateMesozoicriftspstem(CALMRS)hasundergonetwostagesofdevelop-ment.TheearlyonespreadallovertheLateJurassicperiodandwasCharactcrizedwiththeformationofvolcano-teetonicstructuresofasubsidencecalderatypeandembryonicriftsvolcanogeneous-terrigenefilling.Volcariitesarerelatedtosubalkalinerbyo