... basementconsists of mainlyargilite,sandstone and somebands of limestone and this material aremetamorphosed and now found in the form of gneiss, micaschist, quartzite and marbles. ... of Cambodia, Laos and Vietnam (Explanatory note to thegeological map of Cambodia, Laos and Vietnam at 1:1.000.000 scale),Institute of Information and Documentation of Mine and Geology,Hanoi,1989(inVietnamese).[16] ... collisionalVuVanTichetal./VNUJournal of Science,EarthSciences23(2007)253‐264257metamorphism.But,here,takeintoaccount:thedirection and slope of regional foliation; smallnumber of sample and their location; theproximity of dextral movement of thenumerous shear zones,...