Editing Fossil (section)

==== Carbonization and coalification ====
Fossils that are carbonized or coalified consist of the organic remains which have been reduced primarily to the chemical element carbon. Carbonized fossils consist of a thin film which forms a silhouette of the original organism, and the original organic remains were typically soft tissues. Coalified fossils consist primarily of coal, and the original organic remains were typically woody in composition.

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File:Probable leech from the Waukesha Biota.jpg|Carbonized fossil of a [[cycloneuralia]]n worm that was once misidentified as a [[leech]]<ref>{{Cite journal |last1=Braddy |first1=Simon J. |last2=Gass |first2=Kenneth C. |last3=Tessler |first3=Michael |date=2023-09-04 |title=Not the first leech: An unusual worm from the early Silurian of Wisconsin |url=https://www.cambridge.org/core/journals/journal-of-paleontology/article/not-the-first-leech-an-unusual-worm-from-the-early-silurian-of-wisconsin/2AB9EDAF214C38A8EE93C260BAC9878D |journal=Journal of Paleontology |volume=97 |issue=4 |language=en |pages=799–804 |doi=10.1017/jpa.2023.47 |bibcode=2023JPal...97..799B |s2cid=261535626 |issn=0022-3360}}</ref> from the Silurian [[Waukesha Biota]] of Wisconsin.
File:Lycopod axis.jpg|Partially coalified axis (branch) of a [[lycopod]] from the Devonian of [[Wisconsin]].
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