We detected three categories of Po: tremolitic (containing asbestos fibers), non-tremolitic, and partly tremolitic (some families used tremolitic Po; others used a material without fibers).
Based on geological maps and environmental sampling, we identified the following natural sources of asbestos: in the Boghen unit, serpentinite slivers were the host of tremolitic occurrences that, by weathering at the base of the soil horizon, evolve into white aggregates [Supplemental Material, Figure 2 (doi:10.
n+1] regional metamorphic foliation within the tremolitic
schist (samples MO-2IVD-5, Fig.
35 (1997), cummingtonite) 219 Tremolitic
hornblende Leake et al.
Vanderbilt, a Connecticut-based firm that mines and produces tremolitic
talc, which is used in a host of manufacturing processes, for tires, paint, plastic, ceramics and shingles.
22 metre intersection comprising veins and skarnified tremolitic
limestone containing sulfides -- pyrite, chalcopyrite and galena.
schists are partially imbedded within this series and are metabasites by the origin.