Carnotite resources of the Calamity group area, Mesa County, Colorado

The Calamity group area, which includes 28 unpatented Government claims and enclosed fractions of public domain, lies along the east rim of Calamity Mesa, Mesa County, Colo.  From 1915 through 1944, about 10,000 tons of carnotite ore, averaging about 1.0 percent U₃O₈ and 2.5 percent V₂O₅, was produced from mines in this group (tons in this report are short tons).  Production from this area from August 1949 to January 1, 1951, totaled 8,100 tons of ore with an average grade of 0.36 percent U₃O₈ and 1.66 percent V₂O₅, containing about 58,600 pounds of U₃O₈ and 268,000 pounds of V₂O_5.