click below
click below
Normal Size Small Size show me how
Fossils
Term | Definition |
---|---|
body fossil | actual parts of an organism, unaltered or altered (bones, shells, leaf imprints) |
trace fossil | evidence of life that is not a body fossil (tracks, burrows, casts) |
sedimentary rock | the type of rock fossils are usually found in |
relative age | its age compared to the ages of other rocks |
index fossils | fossils of organisms that were widely distributed but only lived during a short period of time |
fossil | the preserved remains or traces of an organism |
petrified fossil | fossil formed when minerals replace all or part of an organism |
mold | a hollow area that looks like an organism in sediment |