Fossils Facts

Fossils Facts
The facts we know about organisms that lived millions of years ago are found in fossils. Fossils are the remains left behind by an organism. Fossils are usually found within rocks of the Earth's crust. We know that organisms have evolved and changed over the years because of the clues that fossils give us.
Interesting Fossils Facts:
The majority of fossils are found within sedimentary rocks.
Fossil beds are public places that allow anyone to look for and collect their own fossils.
Because sedimentary rocks are used to construct buildings, fossils can sometimes be found within the structure of buildings.
Most organisms do not leave fossils when they die because most of their parts either decay or are destroyed.
The best ways for an organism to become a fossil is if it is buried alive or is buried soon after dying.
Fossils can exist as parts of an organism or traces of an organism such as a footprint or a burrow.
Petrified fossils are fossils where the bone and other living material have been replaced by deposited minerals.
Most dinosaur fossils are actually petrified fossils.
A mold is a type of fossil that occurs when the hard parts of a buried organism dissolve and leaves a hole.
1When minerals fill molds, it forms another type of fossil called a cast.
1When waste materials from an animal form a fossil, it is called a coprolite.
1Imprints are molds of thin objects such as leaves.
1Some fossils of organisms contain the original matter. These fossils are called unchanged fossils.
1A lot of unchanged fossils are found in tar pits, amber, and ice.
1 Trace fossils such as tracks and footprints give clues about animals' size and shape.

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