This report follows a preliminary geophysical investigation that was made in the Colorado-Utah Plateau in search of carnotite ore deposits.

A report regarding carnotite resources of the Moon Mesa and Horse Mesa Areas, Mesa Montrose Counties, Colorado.

A report regarding carnotite resources of Outlaw Mesa, Mesa County, Colorado.

"Thorium deposits were discovered in the Powderhorn district in 1949. This district has long been known for its occurrences of alkalic igneous rocks, of which the best known is the Iron Hill complex (Larsen, 1942). Some of these alkalic rocks contain titanium, barium, strontium, rare earths, thorium, and niobium in greater percentages than those of most igneous rocks. A study of the thorium deposits was undertaken to obtain more information on the geologic relation of minor elements, particularly rare earths, and thorium, to alkalic igneous rocks, and to evaluate the economic significance of the Thorium deposits."

The following report presents a preliminary account of the geology and economic aspects of the uranium deposits in the Eureka Gulch area.

"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"

"This report, prepared principally to aid in the interpretation of the core drilling, presents the principal results of the field and preliminary laboratory work by the U.S. Geological Survey; it does not contain information obtained from the core drilling."

"Between April 21, 1949, and August 20, 1955, the U.S. Geological Survey explored the southern part of the Uravan district for uranium-vanadium deposits and to appraise the uranium-vanadium reserves in the area."

A report regarding a geological survey of the Wet Mountains, Colorado. Concerns work done on behalf of the Division of Raw Materials of the U.S. Atomic Energy Commission.

A report regarding a geological survey of the geology and ore deposits of the Freeland-Lamartine District, Clear Creek County, Colorado. Concerns work done on behalf of the Division of Raw Materials of the U.S. Atomic Energy Commission.

A report regarding the geology and uranium deposits of the Caribou Area, in Bouler County, Colorado. This report concerns work done on behalf of the Division of Raw Materials of the U.S. Atomic Energy Commission.

A report regarding the Robinson and Wetherly Uraniferious Pyrobitumen Deposits Near Placerville, San Miguel County, Colorado. This report concerns work done on behalf of the division of Raw Materials of the U.S. Atomic Energy Commission for the purpose of determining the uranium reserves, mode of occurrence, and extent of these deposits.

"This paper summarizes the results of the field studies of the Survey's Reconnaissance Group and outlines some geologic criteria that may be useful in guiding the search for uranium ore. The writers wish to acknowledge the cooperation of the minding companies and individuals who materially aided the program of investigations by reporting radioactive localities and by submitting samples of radioactive rocks and ores."

A report regarding the distribution and thickness of salt in the paradox basin of southeastern colorado and southeastern Utah. This report concerns work done on behalf of the Division of research of the U.S. Atomic Energy Commission.

A report regarding the areal geology of the Placerville Quadrangle, located in colorado. This report concerns work done on behalf of the division of Raw Materials of the U.S. Atomic Energy Commission.

A report regarding the uranium content of ground and surface waters in Western Kansas, eastern Colorado, and the Oklahoma panhandle. This report concerns work done on behalf of the Division of Raw Materials of the U.S. Atomic Energy Commission.

A report regarding Caronotite Resources of the Calamity Group Area, In Mesa County, Colorado.

A report regarding carnotite resources of the upper group area in San Miguel County, Colorado

A report regarding the geology of the Quartz creek Pegmatite District, in Gunnison County, Colordao

A report regarding reconnaissance investigations for uranium in the Colorado Front Range and Adjacent Areas.

A report regarding the geology of the Copper King Uranium Mine, in Larimer County, Colorado.

A report regarding exploration for uranium deposits in the Spring Creek Mesa Area, in Montrose County, Colorado.

A report discussing the occurrence and chemical character of ground water in the Morrison Formation in Southeastern Colorado and Southeastern Utah.

"A reconnaissance for radioactive minerals in the San Juan Mountains, Colo. (fig. 1), was started in the western part by W.S. Burbank and C.T. Pierson in 1951, and continued in 1952 by Pierson, W.F. Weeks, and F.J. Kleinhampl, and in 1953 by Pierson and T.H.W. Loomis of the U.S. Atomic Energy Commission in the western part of the mountains in reconnaissance and in examination of a pitchblende occurrence found by Loomis. The work on which this paper is based was done by the Geological Survey on behalf of the Division of Raw Materials of the U.S. Atomic Energy Commission."