Inertinite

Inertinite is oxidized organic material or fossilized charcoal. It is found as tiny flakes within sedimentary rocks. The presence of inertinite is significant in the geological record, as it signifies that wildfires occurred at the time that the host sediment was deposited. It is also an indication of oxidation due to atomospheric exposure or fung...
Found on http://en.wikipedia.org/wiki/Inertinite

inertinite

(from the article `coal`) The inertinite group makes up 5 to 40 percent of most coals. Their reflectance values are usually the highest in a given sample. The most common ... ...ratios, are derived from plant spores, cuticles, resins, and algal bodies. (2) Vitrinite macerals, with intermediate reflectance and high ... Macerals are cl...
Found on http://www.britannica.com/eb/a-z/i/20
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