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fossils. yeah. :)

Mold (imprint) fossils

When a leaf, feather, bone or even a body of an organism leaves an imprint on sediment, which hardens and becomes rock

Cast fossils

When minerals fill in the hollows of an animal track, a mollusk shell, or another part of an organism

Fossil fuels

Fuels formed by the remains of dead plants and animals

Actual remains

The body of an organism, with all the parts intact. Usually preserved in ice, amber, or tar.

Petrified wood

When minerals replace wood or stone to create either petrified wood or a mineralized fossil

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