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Zinc-Lead-Copper Resources and General Geology of the Upper Mississippi Valley District
From introduction: This report discusses the general geology of the Upper Mississippi Valley zinc-lead district, the distribution of ore deposits, and some relations of the ore deposits to the major geologic features.
Date:
1955
Creator:
Heyl, Allen V.; Lyons, Erwin J.; Agnew, Allen F. & Behre, Charles H., Jr.
Object Type:
Report
System:
The UNT Digital Library
[Letter from I. H. Kempner to R. M. Armstrong, July 9, 1955]
Letter from I. H. Kempner to R. M. Armstrong discussing prepays.
Date:
July 9, 1955
Creator:
Kempner, Isaac H. (Isaac Herbert), 1873-1967
Object Type:
Letter
System:
The Portal to Texas History
Airborne and Ground Reconnaissance of Part of the Syenite Complex Near Wausau, Marathon County, Wisconsin
Report documenting the radioactive mineral resources found in Wisconsin during reconnaissance surveys, with descriptions of methods, findings, and recommendations regarding the minerals.
Date:
August 5, 1955
Creator:
Vickers, Rollin C.
Object Type:
Report
System:
The UNT Digital Library