Strategic and critical minerals in the midcontinent region, United States. Contents: A, Geology and mineral paragenesis of the Pea Ridge iron ore mine, Washington County, Missouri-origin of the rare-earth-element and gold-bearing breccia pipes, by Laurence M. Nuelle, B, Some mineralogical and geochemical aspects of Middle and Upper Pennsylvanian marine black shales in part of the Midcontinent region , by George A. Desborough, C, Mineralogical and geochemical analysis of the metal-and organic-rich grassy creek shale of the New Albany Group (Upper Devonian and Lower Mississippian) in Hardin County, southern Illinois, by George A. Desborough.  edited by Warren C. Day and Diane E. Lane.
Contributors: Lane, D.E.; Nuelle, L.M.; Desborough, G.A.
Publisher: U.S. Dept. of the Interior
Place of publication: Washington
Language: eng
Subjects: Strategic minerals - United States
Notes: 11