From introduction: This report details the reconnaissance for uraniferous lignites in North Dakota, South Dakota, Montana, and Wyoming during 1948 and 1949.

From abstract: The Legin group area comprises five privately owned claims, nine Government claims, and some public land. The area is in parts of secs. 28 and 29, T. 43 N., R. 19 W., New Mexico principal meridian, San Miguel County, Colo. It is about 45 miles from the Government mill at Monticello, Utah, and 50 miles from the Vanadium Corporation of America mill at Naturita, Colo. The Legin group area has yielded a total production of more than 18,000 short tons of carnotite ore that averaged 0.32 percent U30 and 2.5 percent V 205 . Most of this production was accomplished during the years from 1935 to 1944, and from 1949 to October 1951.

This is a photogeologic map scale 1:24,000 of Verdure-2 Quadrangle, San Juan County, Utah.

This is a photogeologic map scale 1:24,000 Clay Hills-13 Quadrangle, Navajo Indian Reservation, San Juan County, Utah.

This is a photogeologic map scale 1:24,000 of Clay Hills-12 Quadrangle, Piute Indian Reservation, San Juan County, Utah.

From abstract: In the vicinity of Salmon Bay near the northeastern end of Prince of Wales Island, southeastern Alaska, samples obtained in 1951 from narrow, steeply dipping, carbonate-hematite veins contain as much as ,O.07 percent equivalent uranium. The average grade of these veins cannot be reliably stated because no systematic sampling has been done. No uranium or thorium minerals have been identified. Several chemical analyses indicate only a few thousandths percent uranium. Most of the radioactivity is apparently caused by thorium, which seems to be in or closely associated with red hematite.

This is a photogeologic map scale 1:24,000 of Stinking Spring Creek-14 Quadrangle, Wayne County, Utah.

This is a photogeologic map scale 1:24,000 of Mt. Peale-13 Quadrangle, Wayne County, Utah.

This is a photogeologic map scale 1:24,000 of Verdure-1 Quadrangle, Colorado-Utah.

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

This is a photogeologic map scale 1:24,000 of Bluff-14 Quadrangle, Navajo Indian Reservation, San Juan County, Utah.

This is a photogeologic map scale 1:24,000 of Setsiltso Springs-3 Quadrangle, Navajo Indian Reservation, Apache County, Arizona.

This is a photogeologic map scale 1:24,000 Verdure-8 Quadrangle, Colorado-Utah.

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

From abstract: A sequence of slightly radioactive Pliocene(?) rocks in the Split Rock area of central Wyoming is at least 600 feet thick, underlies an area of more than 25 square miles, and consists of alternating beds of tuffaceous shale, sandstone, and pumicite. Only a small part of the section has been examined. In addition to the uranium content of the strata, there has been secondary concentration of uranium in brecciated limestone similar to spring deposits that could be of Pliocene or Pleistocene age.

Abstract: Dark shale and arkosic sandstone south of Guadalupita, Mora County, New Mexico, contain as much as 4 percent copper and 0. 01 percent uranium on the basis of a few samples recently analyzed. The deposits occur primarily in the dark shale which is about 5 feet thick and dips about 900. Potential reserves of this material are very large. Prospecting and further geologic work will be necessary, however, to evaluate possibilities of these large tonnages. If the deposits can be mined for their copper content, the uranium might be recovered as a byproduct. Detailed mapping and possibly some trenching will be undertaken by the Geological Survey in order further to evaluate the deposits.

From abstract: Airborne radioactivity surveys in the Mojave Desert region, Kern, Riverside, and San Bernardino counties were made in five areas recommended as favorable for the occurrence of radioactive raw materials: (1) Rock Corral area, San Bernardino County. (2) Searles Station area, Kern County. (3) Soledad area, Kern County, (4) White Tank area, Riverside and San Bernardino counties. (5) Harvard Hills area, San Bernardino County. Anomalous radiation was detected in all but the Harvard Hills area.

Photogeology map outlining topographic and geologic features in the Clay Hills-14 quadrangle at the Navajo Indian Reservation in San Juan County, Utah. Scale 1:24,000.

This is a scale 1:24,000 photogeologic map of Clay Hills-16 at the Navajo Indian Reservation in San Juan County, Utah.

Photogeologic map marking topographic and geologic features of the Mt. Peale-7 quadrangle in San Juan County, Utah. Scale 1:24,000.

Abstract: "The mineral bayleyite was first described in 1951 from a mine in Yavapai County, Ariz. This report describes bayleyite from the Hideout No. 1 mine, San Juan County, Utah, together with its associated minerals and mineralogic properties."

The following report covers a reconnaissance for new discoveries of radioactive lignite deposits in the Green River Basin and Uinta Basin of Wyoming and Utah where similar discoveries to previous studies in North Dakota, South Dakota, Montana, and Wyoming were made. Additionally, there were new prospects examined, as well as reconnaissance for uranium deposits.

Report discussing a geological study performed to find uraniferous lignites in North Dakota, Eastern Montana, north-central Wyoming, and northwestern South Dakota. "Deposits of uraniferous lignites were discovered at Blue Buttes, eastern Montana; and at North Cave Hills, South Cave Hills, and at Slim Buttes in northwestern South Dakota."

Report discussing the reconnaissance for radioactive uraniferous rocks in parts of Colorado, Wyoming, and Utah. Regional geology of each area, results of regional reconnaissance, and miscellaneous prospects are included.