Chapter 1.—Stratigraphic Setting of the Mississippi Valley Lead and Zinc Deposits

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Abstract
By Raymond C. Moore Because the lead and zinc deposits of the Mississippi Valley region are all found in rocks of sedimentary origin and because any well-grounded attack on problems of the genesis of these deposits must take account of stratigraphic relations of the ore bodies, it has been thought desirable to bring together summary statements on the stratigraphy of at least the most important mining districts in the region. The following papers undertake to give concise descriptions of the rock formations that are associated with ore deposits in (1) The Tri-State district of Missouri, Kansas, and Oklahoma, (2) the Northern Arkansas district, (3) the Southeastern Missouri district, (4) the Wisconsin-Illinois district, and (5) the Central Kentucky district. The contributors of these articles are well qualified through personal field studies in their respective areas with the stratigraphic succession and general relations of the ore bodies. Description of stratigraphic features of the districts is followed by a brief comparison and interpretation of the significance of stratigraphic evidences as to ore genesis. TRI-STATE DISTRICT OF MISSOURI, KANSAS, AND OKLAHOMA By Raymond C. Moore, George M. Fowler, and Joseph P. Lyden GENERAL DESCRIPTION The lead and zinc deposits of the Tri-State district occur in rocks of Mississippian age. This paper describes briefly the known stratigraphic succession of Mississippian rocks on the southwest flank of the Ozark uplift and indicates in some detail and greatest possible exactness stratigraphic horizons of ore deposition in the Tri-State district. Mr. Moore is responsible for the . . .

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