This report contains data from a survey taken between August 11 and August 27, 1978 on the high sensitivity airborne gamma-ray spectrometer and magnetometer over the Ashton quadrangle in Idaho, Montana, and Wyoming.

Abstract: A low-level airborne radioactivity survey of parts of Beaverhead and Madison Counties in southwestern Montana was undertaken from June 6 to October 14, 1955. Flying centered around the Ruby Range-Sweetwater Basin area and concentrated on the Precambrian metamorphic complex and Tertiary lake-bed sediments. No commercial uranium deposits were discovered, and no extensions were found of the few known small occurrences. Five areas of high background detected through the survey were investigated on the ground.

Table listing the 1,073 known mineral occurrences in the project area, the Dillon, Butte, Hamilton, and Elk City 1º x 2º NTMS Quadrangles. Included is an additional table indexing abbreviations and terms used the mineral occurrence table for host or associated rocks, deposit types, and commodities.

Text summarizing the features of the 10 type localities and 30 anomalous areas for mineral occurrences in the project area, the Dillon, Butte, Hamilton, and Elk City 1º x 2º NTMS Quadrangles. Each report includes date, chemical symbols for major/minor metals, location data, geochemical features, radiometric features, geophysical features, structural features, and host rocks.

Graphs showing the frequency distribution and probability of uranium deposits for mineralized environments in the Dillon, Butte, Hamilton, and Elk City 1º x 2º NTMS Quadrangles.

Averaged record data listings taken during aerial gamma-ray and magnetic surveys of the Ashton quadrangle in Idaho, Montana, and Wyoming.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Ashton quadrangle in Idaho, Montana, and Wyoming.

The purpose of this report is to present the results of a condition survey performed at Malmstrom Air Force Base (MAFB), Montana, during 24-27 April 1972. The three major areas of interest considered in this condition survey were the structural condition of the primary airfield pavements, the condition of pavement repairs and the types of maintenance materials that have been used at this airfield, and any detrimental effects of frost to the pavement facilities.

Report regarding an investigation on fishing pressure, yield, and expenditures by fishermen on the Madison river in Montana.

From abstract: All geologic conditions in the Dillon Quadrangle (Montana and Idaho) have been thoroughly examined, and, using National Uranium Resource Evaluation criteria, environments are favorable for uranium deposits along fractured zones of Precambrian Y metasediments, in the McGowan Creek Formation, and in some Tertiary sedimentary basins.

Appendices containing supplementary analytical data of stream-water and stream-sediment samples, in addition to geochemical analyses of rock samples for the Dillon and Dubois Quadrangles. Also included are detailed uranium-occurrence reports for twelve deposits in the Dillon quadrangle, which include including a description, uranium analysis, exact location, deposit type, and features of the host rock.

From abstract: Geologic settings are recognized in central and eastern Montana and in a few places in southwestern Montana that elsewhere are similar to the settings for the occurrence of uranium deposits. Several specific areas in Montana seem favorable for the occurrence of uranium.

Average record data listings taken during aerial gamma-ray and magnetic surveys of the Ekalaka quadrangle in Montana, North Dakota, and South Dakota.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Ekalaka quadrangle in Montana, North Dakota, and South Dakota.

A report explaining map symbols for the geologic map of the Northern and Western Flanks of the Black Hills, Wyoming and Montana.

Abstract: The Free Enterprise property is located in the Boulder mining district, Jefferson County, Montana. Secondary uranium minerals occur here in small irregular concentrations in and adjacent to a narrow silicified fracture zone in quartz monzonite.

"This project was conducted to integrate National Uranium Resource Evaluation (NURE) geochemical and geophysical data from butte, Dillon, Elk City, and Hamilton NTMS Quadrangles."

Maps showing the locations of aerial radiometric data for mineral occurrences in the project area, the Dillon, Butte, Hamilton, and Elk City 1º x 2º NTMS Quadrangles.

From introduction: The purpose of this report is to describe the channel-geometry technique and to present equations for estimating mean annual runoff and peak flows for ungaged streams in southeastern Montana.

Introduction: During the year 1952-1953, research on the Boulder batholith program was largely devoted to basic mineralogy studies of the "siliceous reef" and, to the extent possible at that time, the "base metal" deposits.

Report issued by the U.S. Bureau of Mines discussing the mining procedures and minerals of Broadwater County, Montana. History, geology, and mineral production of the Broadwater County mines are presented. This report includes tables, and maps.

Results of reconnaissance surveys of the Havre quadrangle to determine the likelihood of uranium deposits of the area, and additional information about the location and classification of any deposits.

Discussing uranium occurrences in the Havre Quadrangle

Discussing chemical sample analyses from the Havre Quadrangle