From introduction: A program of uranium investigations and geologic mapping on the Navajo Indian Reservation in Apache and Navajo Counties, northeastern Arizona (fig. 1) was undertaken by the U. S. Geological Survey on behalf of the Atomic Energy Commission during the field seasons of 1951 and 1952. Field work on this program has been completed and preliminary copies of the maps, which cover an area of about 700 square miles, are inclosed as part of this report. The two principal objectives of the program were to establish geologic criteria useful as guides in prospecting for uranium deposits, and to appraise the favorableness of the Shinarump conglomerate and other Triassic rocks for the occurrence of uranium deposits in order to select areas that deserve exploration for concealed deposits.

Report discussing a study of the mineralogy of various Jurassic and Cretaceous claystones and siltstones of Colorado and Utah. The study was aimed at determining which minerals characterize fine sediments which include important uraniferous strata.

Report discussing a series of geological investigations of the Wet Mountains in Custer County, Colorado, including reconnaissance for thorium and detailed topographical mapping of the area. The investigations took place from 1950-1952.

From Abstract: "This report summarizes data available on radioactive source materials in Los Estados Unidos de Venezuela accumulated by geologists of the Dirección Técnica de Geología and antecedent agencies prior to June 1951, and by the writers from June to November 1951."

Report discussing a geological examination for radioactive materials in an area of about 5 square miles near Montezuma, Colorado during the fall of 1952.

From Abstract: "The mineral constituents of churn drill cuttings from a well through the Bone Valley formation and into the Hawthorn formation were determined. The weight percent of each mineral is given, as well as a description of the samples and the methods used."

Report discussing a 1949 geological examination for radioactive deposits in the Nixon Fork mining district of Medfra quadrangle, central Alaska.

Report describing studies regarding billietite and becquerelite. Tables with optics of the materials, chemical analyses results, cell constants and specific gravities, and interplanar spacings of the materials are included as well as crystallographic forms of billietite

Report discussing the investigation of radioactive deposits in granite and search for bedrock source of radioactive materials in the Ruby-Poorman district of Alaska during July 1949.

A report regarding a reconnaissance done in 1949 in order to look for radioactive deposits in the Nixon Fork Mining District, located in the Medfra Quadrangle, in Central Alaska.

Report discussing field work done between 1947 and 1951 for a reconnaissance radiometric survey of the Garfield and Taylor Park quadrangles of the Sawatch Range in Chaffee and Gunnison Counties of west-central Colorado.

This report describes the distribution of geologic features that may be used as geologic guides to carnotite deposits, sedimentary trends of the ore-bearing sandstone, and regional structures within and adjacent to the Urvan mineral belt in the Urvan and Gateway mining districts, Montrose and Mesa Counties, Colorado.

Report discussing the progress made on various geologic studies during the period from January 1 - March 31, 1952.