This is a photogeologic map scale 1:24,000 of Clay Hills-7 Quadrangle, San Juan County, Utah.

This is a photogeologic map scale 1:24,000 of Clay Hills-8 Quadrangle, San Juan County, Utah.

Discussing a geologic reconnaisance performed to determine the uranium potential of the Inter-River area

This is a photogeologic map, scale 1:24,000, Bluff-11, in San Juan County, Utah.

This is a scale 1:24,000 photogeologic map of Elk Ridge-16 Quadrangle in San Juan County, Utah.

This is a photogeologic map, scale 1:24,000, Elk Ridge-14, in San Juan County, Utah.

Abstract: The Happy Jack uranium deposit of White Carron, San Juan County, Utah, was studied in connection with an Atomic Energy Commission exploration program. The major uranium ore control is a paleostream channel containing sediments of the Shinarump conglomerate. Intrachannel controls include organic matter, lithologic variations, and channel "lows". Microscopic studies reveal that uraninite, the primary ore mineral, occurs as cement and as a replacement of organic material. Both the uraninite and copper sulfides replace secondary quartz overgrowths. Crystals of chalcopyrite, chalcocite, and pyrite occur one within the other. Resolution of bornite and chalcopyrite is present. Uraninite is dated as later than the secondary overgrowths and of about the same age as the copper sulfides.

Report discussing the geology of the Red House Cliffs area, which comprises 296 square miles of canyon and plateau country in southwestern San Juan County, Utah.

Abstract: A reconnaissance for radioactive minerals in the Shinarump conglomerate of Triassic age exposed north of the San Juan River at Balanced Rock anticline was made in July 1953. The purpose of the reconnaissance was to search for any exposed uranium minerals and to determine the favorability of the Shinarump for accumulation of uranium-ore deposits. No uranium minerals or places of abnormally high radioactivity were observed. However, nine exposed channels at the base of the Shinarump conglomerate and other channels, probably present where the base of the Shinarump is concealed, indicate the Shinarump may be favorable for uranium-ore deposits.

From introduction: The main objectives of the Red House Cliffs project are to appraise the uranium possibilities of the area, to determine the areal distribution and character of the ore-bearing Shinarump conglomerate and to prepare a geologic map of the area. The purpose of this preliminary report on the Red House Cliffs project is to summarize results of the field work done from July 6, 1952, to October 31, 1952, and to present plans for future work on the project. This work was done on behalf of the U. S. Atomic Energy Commission.

Gregory described the broad geologic and geographic features of the white canyon area in the reconnaissance report on San Juan county.

Discussing the investigative drilling of the Elk Ridge Area in San Juan County, Utah.

This is a photogeologic map scale 1:24,000 of Bluff-5 Quadrangle, San Juan County, Utah.

This is a photogeologic map scale 1:24,000 of Bluff-6 Quadrangle, San Juan County, Utah.

Photogeologic map scale 1:24,000 of San Juan County in Utah.

Photogeologic map of the Orange Cliffs-1 quadrangle, Wayne and San Juan counties, Utah

Abstract: The Behind the Rocks Wilderness Study Area (UT-060-140A) consists of 12,635 acres in Grand and San Juan Counties, Utah. The study area has inferred subeconomic resources of potash and halite in the subsurface, and sandstone on the surface. The study area has high potential for undiscovered resources of oil and gas, low potential for undiscovered uranium, copper, vanadium, gold, silver, other metals, and geothermal energy, and unknown potential for the rare-earth mineral, braitschite. There is no resource potential for potash or halite (beyond the previously mentioned inferred resources) or for coal.

From abstract: The Indian Creek (UT-060-164), Bridger Jack Mesa (UT-060-167), and Butler Wash (UT-060-169) Wilderness Study Areas are located in San Juan County, southeastern Utah. Inferred subeconomic resources of sandstone and sand and gravel exist within all three wilderness study areas, but because of their abundance throughout the region, their distance from current markets, and their lack of unique properties, these materials have no current likelihood for development.

Introduction: This study was made in conjunction with a core drilling program designed to trace ore trends from existing mines eastward under deeper cover. The exploration drilling covered an area of about 1 square mile. The results of previous drilling by the Commission, which covered an additional 10 square miles, have been incorporated in this report.

This is a photogeologic map scale 1:24,000 of Bluff-4 Quadrangle, San Juan County, Utah.

A preliminary photogeoloic map of the Carlisle quadrangle.

This is a photogeologic map, scale 1:24,000, Carlisle-13, in Garfield and San Juan Counties, Utah.

This is a photogeologic map, scale 1:24,000, of Orange Cliffs-16 in Garfield and San Juan Counties, Utah.

This report analyzes the Mancos Mesa Wilderness Study Area in San Juan County that contains low mineral resource potential for other metals, coal, and geothermal energy.