Helena and Ennis Talc Deposits

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Anderson, Howard N.
Helena; Ennis; Three Forks; Montana; talc; soapstone; shale; Ceramic Materials; Environmental Engineering; Geology; Geophysics and Seismology; Metallurgy; Other Engineering; Other Materials Science and Engineering
thesis / dissertation description
The purpose of this report is to collect geologic data concerning two Montana talc occurrences at Helena and Ennis and to offer some explanation as to their origin. The two deposits cited are in somewhat similar lithologic settings and both possess the same mineralogical and structural features. Because of this similarity only the Helena deposit is covered in detail.