Blount (3) reported asbestiform
tremolite contamination of the ore used in a popular baby powder.
" is a term applied to minerals with a macroscopic habit similar to that of asbestos.
In a review published by the International Agency for Research on Cancer (IARC) in 1987, talc powders containing and not containing asbestiform
fibers were separated as topics of discussion .
 Committee on Nonoccupational Health Risks of Asbestiform
Fibers Board of Toxicology and Enviromental Health Hazard and National Research Council, Asebstiform Fibers: Nonoccupational Health Risks, National Academies Press, Washington, DC, USA, 1984.
EPA 2014c), was the site of a former mine that produced vermiculite contaminated with a mixture of asbestiform
amphiboles, including winchite, richterite, and tremolite asbestos (Meeker et al.
[section] 61.141, states: "Asbestos means the asbestiform
varieties of serpentinite (chrysotile), riebeckite (crocidolite), cummingtonite-grunerite, anthophyllite, and actinolite-tremolite." Other federal agencies have adopted similar definitions of asbestos that include the same six forms of asbestos, including 29 C.F.R.
Much of the fibrous material, including winchite and richterite, did not fall into the definition above, despite containing long, thin "asbestiform
" mineral fibers.
On the northern end of the body asbestiform
serpentine is also noted which imparts a fibrous appearance to the rock (Khan and Humayoun, 1980).
The serpentine group contains a single asbestiform
variety: chrysotile, which comprises over 90% of the asbestos mined worldwide today (Craighead & Mossman, 1982).
Carbone drew a parallel between Dunn County and Libby, Mont., where vermiculite containing asbestiform
amphiboles were mined from 1920 to 1990 and given free of charge for insulation and to build driveways and ball fields.
NSSGA also has recommended expansion of the definition of asbestos to include other asbestiform