[[Fasciculus:Coal.jpg|thumb|[[Carbo]], unus ex fomitibus fossilibus.]]
'''Fomes fossilis''' est [[fomes]] a rationibus [[naturaopes naturae|rationibus naturalibus]]libus generatus sicut [[decompositio anaerobica]] humatorum [[organismus|organismorum]] [[mors|mortuorum]], usitate ex [[terra (humus)|terra]] extractus.<ref>Licet [[fomes nuclearis|fomes nucleares]] sicut [[uranium]] quoque e terra extracti sint, fomes nucleares re vera ignem non alunt in [[reactor nuclearis|reactoribus nuclearibus]].</ref> Aetas horum organismorum et eorum eventualium fomitum fossilium plerumque est [[millio]]nes [[annus|annorum]], aliquando plus quam 650 milliones annorum.<ref>Paul Mann, Lisa Gahagan, et Mark B. Gordon, "Tectonic setting of the world's giant oil and gas fields," in [http://books.google.com/books?id=mrghwzjeU-AC&pg=PA50&lpg=PA50&dq=%22precambrian+oil%22+halbouty&source=bl&ots=xGS8yx9cUn&sig=kAQvoCdognlM-k0bDI2ZLCj5ri4&hl=en&ei=bo8_SoSNJZPCsQPYgvS6Dw&sa=X&oi=book_result&ct=result&resnum=1 ''Giant Oil and Gas Fields of the Decade, 1990–1999,''] ed. [[Michel T. Halbouty]] (Tulsae, Oclahomae: American Association of Petroleum Geologists), p. 50, accessum 22 Iunii 2009.</ref> Fomites fossiles multas centesimas [[carbonium|carbonii]] continent, et inter eos sunt [[carbo]], [[turfa]], [[petroleum]], et [[gasium naturale|gas naturale]].
