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  Partner: UNT Libraries Government Documents Department
 Decade: 1960-1969
 Year: 1967
 Serial/Series Title: Report of investigations (United States. Bureau of Mines)
 Collection: Technical Report Archive and Image Library
Preparation Characteristics of Pennsylvania Anthracite from the Bottom Red Ash Bed, Northern Field

Preparation Characteristics of Pennsylvania Anthracite from the Bottom Red Ash Bed, Northern Field

Date: July 1967
Creator: Sanner, William S.
Description: Report issued by the Bureau of Mines on the anthracite coal in the Bottom Red Ash Bed in Pennsylvania. The coal samples were analyzed for thickness and geologic structure. The amount of recoverable coal was also estimated. This report includes tables, maps, and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Stress Ellipsoid Determination in a Rock-Burst-Prone Area at a 4,000-Foot Depth, Galena Mine, Wallace, Idaho

Stress Ellipsoid Determination in a Rock-Burst-Prone Area at a 4,000-Foot Depth, Galena Mine, Wallace, Idaho

Date: August 1967
Creator: Ageton, Robert W.
Description: Report issued by the Bureau of Mines over a study on "stress determinations in an area known to be under high stress concentration induced by prior mining operations" (p. 2). The geology, procedures, and instrumentation are discussed. This report includes tables, illustrations, and photographs.
Contributing Partner: UNT Libraries Government Documents Department