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Let’s Learn: Types of Fossils

What are the different types of fossils?

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Fossils can be found in Earth’s crust. There are six different types of fossils. Click on the tabs below to read and learn about each type of fossil!

form of a fish preserved in stone

This is a mold fossil. Mold fossils form when dirt or sand hardens around an organism. Then, the organism decays, leaving an imprint of its form.

dinosaur footprint fossil

This is a trace fossil. Trace fossils show evidence of the activity of an organism, such as footprints, burrows, and feeding marks.

T-Rex fossil being dug up by paleontologists

This is a true form fossil. True form fossils are preserved in the same form as the original organism. You can see structures such as bones, teeth, shells, and hairs.

petrified wood

This is a petrified fossil. In these fossils, the organisms have been replaced over time by minerals. In this picture, the wood has become a stone.

imprint of leaves in stone.

This is a carbon film fossil. Carbon film fossils are preserved in a thin film of carbon. They are often seen in impressions of leaves and feathers.

bee in amber

This is an amber fossil. Amber fossils are preserved in amber, a hardened tree resin, like sap. Amber fossils usually contain insects or other small organisms.