TY - GEN AU - Zimmermann,U AU - Moya,M.C AU - Bahlburg,H ED - International symposium on andean geodynamics, 4 TI - Lower ordovician graptolites propose a new stratigraphic subdivision for the southern puna (NW Argentina): first finds of Arneograptus Murrayi and clonograptus SP in the puna N1 - bibliogr. p. 829 ER -