Carnotite is a primary Uranium ore, first described in 1899 by French scientists M. M. C. Freidel and E. Cumenge, with a specimen collected from Roc Creek in Montrose County, Colorado. It is named for Marie Adolphe Carnot (1839–1920), a French mining engineer and chemist. It often presents with small amounts of Calcium, Barium, Magnesium, Iron, and Sodium, and it often occurs as a crust in sandstones

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Carnotite on a silicate, possibly calcedony.

One of the primary rocks miners sought during the Uranium boom, as this is rich in Vanadium.

Due to the significant deposits of those elements near the area from where this was likely unearthed, Uravan, Colorado, was born.


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