Paleozoic Sedimentary Rocks in Oaxaca, Mexico

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Science  01 Sep 1967:
Vol. 157, Issue 3792, pp. 1033-1035
DOI: 10.1126/science.157.3792.1033


Fossiliferous Cambrian, Ordovician, Mississippian, and Pennsylvanian rocks, never before found in southern Mexico, have been discovered in the Nochixtlán region. Superjacent unfossiliferous sedimentary rocks may be Permian in age. Early Paleozoic and late Paleozoic intervals of marine sedimentation were bounded by intervals of positive tectonism and erosion.