Triassic Water

Glossary

Fossil

A fossil is what is left of a plant or animal from a time long past, or a trace it made, kept in rock.

What the glossary says

Fossil — “remains or trace of a plant or animal preserved in a rock from some past, prehistoric time”

U.S. Geological Survey, “Glossary of Geologic and Architectural Terms”. Quoted word for word. Credit: U.S. Geological Survey.

Fossil bones of a marine reptile laid out and photographed against a plain background.
Real photographBones of Thalassiosaurus ischiadicus, a long-necked sea reptile of the family Elasmosauridae, dug up in Logan County, Kansas in 1927.USNM V11910, collected by George F. Sternberg in Logan County, western Kansas, in 1927. The museum record gives its family as Elasmosauridae and its age as Late Cretaceous.Smithsonian National Museum of Natural History (USNM V11910), CC0 · CC0-1.0 · Museum record

Sources

The definition
U.S. Geological Survey, “Glossary of Geologic and Architectural Terms”, dated 07.21.97 on the page itself, https://pubs.usgs.gov/gip/acidrain/glossary.html, read . A work of the U.S. Government, in the public domain. Credit: U.S. Geological Survey.
How this page is made
The definition is quoted exactly. The one plain sentence under the word is ours, and it may not add a number, a date, a place or a living thing the definition does not already name. The picture carries its own credit.