(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
The metamorphic processes of forming coal.
Found on
https://www.encyclo.co.uk/local/22734
the conversion of plant material into coal by natural processes, as by diagenesis and, in some instances, metamorphism.
Found on
https://www.infoplease.com/dictionary/coalification
No exact match found.
