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Effect of Oil-Base Drilling Fluid Filtrate on Analysis of Cores from South Coles Levee, California, and Rangely, Colorado Fields
Report issued by the U.S. Bureau of Mines on the study of contamination of cores obtained with conventional core barrels. The effect of the oil-based drilling fluid and analysis of the cores are presented. The report includes tables, graphs, and illustrations.
Date:
August 1950
Creator:
Gates, Gates L.; Morris, Frank C. & Caraway, W. Hodge
System:
The UNT Digital Library
Exploration of the Big Boulder Prospect, Larimer County, Colorado
From introduction: The Big Boulder prospect is in SE 1/4 sec. 36, T.7N., R.,72W., in Tarimer County, Colorado. The prospect has been opened by four irregular trenches and shallow cuts, and a 10-foot discovery shaft. Hanley 1/4 states that 10.5 tons of beryl were produced from the Big Boulder prospect in 1936, and about 600 pounds in 1941.
Date:
August 1950
Creator:
Thurston, W. R.
System:
The UNT Digital Library