terrestrial organics: vascular plants: “humic”; cellulose, lignin, carbohydrates...
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terrestrial organics:vascular plants: “humic”;cellulose, lignin, carbohydrates
marine/lacustrine organics:phytoplankton, zooplankton; “sapropel”;fats, resinous, waxy
Peat
Lignite
Sub-bituminous
Bituminous
Anthracite
Graphite
H2O H:C ratioMethaneevolved
80oC
50oC
20oC
160oC
240oC
Coal Rank
marineorganic matter
kerogen
petroleumliquids
methaneevolved
120oC
(decarbox-lyation)
asphalt, bitumen
H:C ratio
60oC
20oC
90oC
200oC
carbondioxide evolved
kmburied
1.0
2.0
3.0
4.0
5.0
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