Comendite (Peralkaline Rhyolite) and Basalt in the Mitu Group, Peru; Evidence for Permian - Triassic Lithospheric Extension in the Central Andes (Journal of Research of the United States Geological Survey, Vol. 6, No. 4, pp. 453-457). by Noble, Donald C., Miles L. Silberman, Francois Megard and Harry R. Bowman. and a great selection of …