Bulletin 73

Geology of the Dunkard Group (Upper Pennsylvanian-Lower Permian) in Ohio, West Virginia, and Pennsylvania
by Wayne D. Martin, 49 p., 30 figs., 2 tables, 1998

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This bulletin summarizes Dr. Martin's 50 years of investigation of the Dunkard Group. These rocks have been studied for more than 100 years and their age is still controversial. This bulletin does not resolve the age controversy but discusses previous studies and provides information on lithofacies (mudstone, shale, sandstone, limestone, coal), clastic-rock composition and petrology, fossils, and depositional environments.