at the Mi Vida Mine, the most significant uranium mine in the largest uranium district in Utah. Located south of Moab on the southwest flank of the Lisbon Valley salt-cored anticline, the mineralized zone is contained in the Moss Back Member of the Chinle Formation (Upper Triassic (237 Ma - 201.4 Ma)). Discovered by Charlie Steen and worked from 1952 to 1960, the high grade uraninite ore was transported to the Atlas Mill in Moab for processing. This is what remains at the historic site today.
Mine entrance at the oxidation/reduction boundary in a mudstone in the Chinle Formation.
Wide view of Mi Vida Mine site. Wingate Sandstone forms the jointed escarpment. The red oxidized zone in the Chinle Formation is clearly seen, with the mine entrance (right of center) in the bleached reduced zone.
Tipple to transfer ore from the ore cars onto trucks for transport to the mill for processing.
Electric tender and ore cars, frozen in space and time.