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mold A fossil that formed when an organism pressed into mud, leaving a shape that hardened in rock.
evidence Information and facts that help prove something or make you believe that something is true.
index fossil A fossil of a known age that is used to figure out the age of the rock around it.
imprint A mark made by pressing or stamping something on the surface.
replace To put one thing in place of another.
fossil fuel A fuel that formed from the decayed remains of plants and animals.
trace fossil A footprint, track, or made by an organism and preserved in rock.
petrified fossil A fossil that formed when the hard parts of an organism were replaced by minerals.
paleontologist A geologist who specializes in fossils.
sediment Bits of rock, soil, sand, shells, and the remains of organisms.
Created by: sillyname396