Northern Black Hills
Uranium was discovered in 1952 in Cretaceous sandstones of the Inyan Kara Group near its outcrop in Crook County, Wyoming, near the northeast edge of the Black Hills. Production began in 1953. Ore minerals are uraninite and coffinite in unoxidized sandstone, and carnotite and tyuyamunite in oxidized sandstone. Gangue minerals in unoxidized deposits are pyrite, marcasite, and calcite; in oxidized deposits calcite and iron oxide.
No mining has taken place in the Northern Black Hills district in recent years, but recent high uranium prices have brought new exploration drilling to the area.
Read more about this topic: Uranium Mining In Wyoming
Famous quotes containing the words northern, black and/or hills:
“For generations, a wide range of shooting in Northern Ireland has provided all sections of the population with a pastime which ... has occupied a great deal of leisure time. Unlike many other countries, the outstanding characteristic of the sport has been that it was not confined to any one class.”
—Northern Irish Tourist Board. quoted in New Statesman (London, Aug. 29, 1969)
“Sometimes we see a cloud that’s dragonish,
A vapor sometimes like a bear or lion,
A towered citadel, a pendant rock,
A forked mountain, or blue promontory
With trees upon ‘t that nod unto the world
And mock our eyes with air. Thou hast seen these signs;
They are black vesper’s pageants.”
—William Shakespeare (1564–1616)
“By night and by day I shall seek your truth,
O Lord, light my path, show the way.
What is beyond the hills that I climb,
Lord, clear the mist away.”
—Faye T. Bresler (b. 1959)