A galena-wulfenite-uraniferous-asphaltite horizon in the Magnesian Limestone of Nottinghamshire

T. Deans
1961 Mineralogical Magazine and Journal of the Mineralogical Society  
The top 2 inches of the Lower Magnesian Limestone is feebly but persistently mineralized along its outcrop from Nottingham to Doncaster, predominantly with galena and a little cerussite, frequently with uraniferous asphaltite containing 0·2 to 1% U3O8. Wulfenite, both platy and pyramidal in habit, occurs at Bulwell and Kirkby in Ashfield. The mode of formation and the age of these minerals are discussed.
doi:10.1180/minmag.1961.032.252.04 fatcat:6ye4gxf76jbz5e4etyndaarlxu