Libby, MT and Asbestos | Mesothelioma Deaths & Diagnoses
Asbestos contamination occurred in the Libby, Montana, vermiculite mine from the 1920s to 1990. In the 1920s, the Zonolite Company formed and began mining vermiculite in Libby, Montana. Zonolite continued mining until W.R. Grace purchased the company in 1963. W.R. Grace maintained the operations until the Libby mine closed in …
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