Report issued by the U.S. Bureau of Mines on the development of a mobile compressor and utility station in the oil-shale mine near Rifle, Colorado during 1949. The report includes photographs and illustrations of the mobile station.

Report issued by the U.S. Bureau of Mines on the study of contamination of cores obtained with conventional core barrels. The effect of the oil-based drilling fluid and analysis of the cores are presented. The report includes tables, graphs, and illustrations.

Report issued by the U.S. Bureau of Mines describing the methods and equipment developed at the oil-shale mine near Rifle, Colorado. This report includes photographs and illustrations documenting this equipment.

From introduction: The Big Boulder prospect is in SE 1/4 sec. 36, T.7N., R.,72W., in Tarimer County, Colorado. The prospect has been opened by four irregular trenches and shallow cuts, and a 10-foot discovery shaft. Hanley 1/4 states that 10.5 tons of beryl were produced from the Big Boulder prospect in 1936, and about 600 pounds in 1941.

From introduction: The purpose of this work was to determine the distribution and reserves of pitchblende in the veins. These particular mines were selected because the other mines that had produced pitchblende in the east were either inaccessible, or accessible under such adverse conditions as to make detailed mapping impracticable.

Report discussing properties and uses of beryllium and beryl, an ore of beryllium produced as a by-product of mining in Colorado.

Report discussing an exploratory drilling program in the Charles T. area and vicinity during the period from November 1947 and September 1949. "The purpose of the exploration was to discover new carnotite deposits to support milling operations on the Colorado Plateau, and to appraise the uranium and vanadium resources of the area explored."

Several relatively small copper-uranium deposits have been found in southwestern Utah along the contact of the Shinarump and Moenkopi formations of Triassic age, at least from the San Rafael Swell area of Emery County, southward through central and eastern Garfield County, southwestward into western Kane County, and westward into the southern part of Washington County.

A report regarding factual data obtained during an examination of the copper King Shaft, Black Hawk Claim no. 1, Larimer County, Colorado. This report is designed to provide the owners with the factual data obtained from their property in accordance with the Agreement for Mineral Exploration with them.

A preliminary reserve statement regarding Reserve Bocks 1, 2, and 3, of the Veta Mad and Veta Glad Claims, Georgetown group, located in San Miguel County, Colorado.

A preliminary statement regarding Reserve Block 2 of Club Mesa, located in Montrose County, Colorado.

A report regarding Preliminary reserve statement 3, reserve block 5 (east part), Club Mesa, Montrose County, Colorado

A report regarding Preliminary reserve statement 1, reserve block 1, Club Mesa, Montrose County, Colorado

Report issued by the U.S. Bureau of Mines discussing metal mines in Colorado. As stated in the summary, "this paper describes the mineral deposits and discusses mining and milling methods and related operating conditions in an important gold, silver, lead, and zinc producing area in Ouray, San Juan, and San Miguel Counties, Colo., embracing 250 square miles" (p. 5). This report includes tables, maps, and illustrations.

"This report briefly describes the [Urvanian Mineral Belt] and outlines the geologic evidence supporting its concept. General plans for continuous exploration of this belt, and preliminary prediction of the total amount of carnotite-bearing rocks that might be in one unexplored area, are also presented"

Preliminary reserve statement on the drilling of ore deposits in Club Mesa, Colorado.

Preliminary reserve statement on the drilling of ore deposits in Club Mesa, Colorado.

A preliminary reserve statement regarding Reserve Block A, for the Otero and Eloisa Claims Legin Group, Located in San Miguel County, Colorado.

A preliminary reserve regarding Reserve Blocks 5, 6, and 7 of the Georgeto Claim Georgetown group,. Located in San Miguel County, Colorado.

A preliminary reserve statement, regarding reserve block A of the Outlaw Mesa, Located in Mesa County, Colorado.