Uranium and diagenesis in evaporitic lacustrine mudstone of the oligocene White River Group, Dawes County, Nebraska /

The Oligocene White River Group consists of the Chadron and the overlying Brule Formations in northwestern Nebraska. The Chadron Formation consists of alluvial and colluvial vitric mudstone beds, but in addition contains white persistent layers (purplish-white layers) that probably resulted from soi...

Full description

Bibliographic Details

Main Author:	Dickinson, Kendell A., 1931-
Corporate Author:	Geological Survey (U.S.)
Format:	Government Document Book
Language:	English
Published:	[Washington, D.C.] : U.S. G.P.O., 1991.
Series:	Geological Survey bulletin ; 1956.
Subjects:	Uranium ores > Nebraska > Dawes County. Geology, Stratigraphic > Oligocene. Geology > Nebraska > Dawes County. Diagenesis > Nebraska > Dawes County. White River Group. Uranium ores. Geology, Stratigraphic. Oligocene Geologic Epoch. Geology. Diagenesis. Nebraska > Dawes County. United States > White River Group. West United States.
Summary:	The Oligocene White River Group consists of the Chadron and the overlying Brule Formations in northwestern Nebraska. The Chadron Formation consists of alluvial and colluvial vitric mudstone beds, but in addition contains white persistent layers (purplish-white layers) that probably resulted from soil formation on vitric parent material. West of the current study area a basal sandstone facies of the Chadron is host rock for the Crow Butte uranium deposit. The Brule, which consists mostly of pedogenically altered alluvial and fluvial vitric mudstone deposits, contains a uraniferous lacustrine facies northwest of Chadron, Nebraska.