No. 3(?) coal bed __________________ 18 Pocahontas No. 3(?) rider coal bed _______________-Little Fire Creek(?) coal bed __________________-Fire Creek(?) coal bed _______________________ 32 Beckiey(?) coal bed ________________________.. Little Raleigh(?) coal bed _____________________ Little Raleigh(?) rider coal bed _________________ 37 Sewell coal bed ____________________________ Hughes Ferry(?) coal bed ___________________._ Peat resources, by C. C. Cameron and A. E. Grosz _________ 40 Shale and clay ____________________________ 44 High-silica sandstone _______________________ Stone __________.,________ _____________ Oil and gas potential, by W. J. Perry, Jr. ______________ 54 Geochemical survey, by F. G. Lesure ______________ References cited ________________________________ 60

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The Upper Cretaceous Frontier Formation and the overlying Upper Cretaceous lower part of the Beaverhead Group form a thick sequence of nonmarine, predominantly clastic sedimentary rocks south of Lima and Monida, Montana,