The trace or remains of an organism that lived ago, most commonly preserved in sedimentary rock?

Trace Fossil

Explanation:

Trace fossils are those details preserved in rocks that are indirect evidence of life ... Trace fossils include burrows, track marks, coprolites (fossilized feces), stromatolites (fossilized algal mounds), and rhizoliths or rhizocretions (fossil remains of roots).

Fossil

Explanation:

Fossils like bones and shells are preserved in sedimentary rocks for thousands of years