Zinc-Lead-Copper Resources and General Geology of the Upper Mississippi Valley District
Description:
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.
Partner:
UNT Libraries Government Documents Department