简介:Themegamorphostructuresofcentraltype(mega-MCT)andtransrcgionalfaultzoncs-lincaments(TL)arethemainstructuresoftheeontincntalmargin.Thesestructuresareecryaneient(Precambrian)andrepeatedtcetonic-magmaticactivitywascharactcristicfortheminPhancrozoic.Thefirstofthemis2’54’0thousandkmindiameterandformtwo"r