coalification

(from the article `coal`) ...gaseous and liquid products. With increasing depth, however, the conditions become increasingly anaerobic (reducing), and molds and peats develop. ... ...intruded the coal measures and converted some of the existing bituminous coal to anthracite. Temperatures ranging from 170 to 250 °C (about 340 to ... ...
Found on http://www.britannica.com/eb/a-z/c/101

Coalification

The metamorphic processes of forming coal.
Found on http://www.libertystaruranium.com/miningexplained/mining-geology-glossary/
No exact match found