Coal beds E and F______________ North Riley Pass district. ___________ Traverse Ranch district _____________ South Riley Pass district ____________ 20 Carbonate coal zone__________________ 20 Coal zone C____________________ Coal zone B__________________________ Lonesome Pete coal zone________________ Lower coal beds._______________________ Uranium in carbonaceous siltstone____________ Carbonate prospect.____________________ Uranium in phosphatic claystone_____________ Lonesome Pete mine and vicinity.._______ Uranium in other rocks____________________ Ludlow Member of the Fort Union Forma-tion____________________ Tongue River Member of the Fort Union Formation ___________________________ Chadron Formation-_____-_-______-___ Uranium in water_________________________ Radioactivity equilibrium in samples__________.___ Reliability of radiometric and chemical analyses. Radioactivity-equilibrium status of samples from different stratigraphic zones ________________ Origin of the uranium deposits and source of the uranium.
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