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Modal grain size, percent visible porosity, effective porosity, and air permeability measurements of many of the sandstones of the Nanushuk Group and Torok Formation included in the petrographic study. 4. Tabulated modal compositions and textural data from petrographic examination of sandstones from the Nanushuk Group and Torok Formation.

PLATES (IN POCKET) 1. Geologic map of the Basin Creek area 2. Geologic map of the Carbon Junction area 3. Geologic map of the Florida River area 4. Joint and cleat stations in the Florida River area 5. Geologic map of the South Fork of Texas Creek to the Pine River area 6. Joint and cleat stations in the South Fork of Texas Creek to the Pine River area 7. Measured sections of the Fruitland Formation