FOSSILSBy: Brianna McCormick, Hannah

Feder, and Natalie Gabel

Definition of a Fossil

The remains (or an impression) of a plant or animal that

existed in a past geological age and has been excavated

from the soil

WHERE CAN FOSSILS BE FOUND?

Fossils may be found anywhere and everywhere

there has been a dead plant or animal in the past

HOW DO FOSSILS FORM?

There are five different phases1.) Death2.) Deposition3.) Permineralisation4.) Erosion5.)Exposure

http://www.discoveringfossils.co.uk/whatisafossil.htm

DIFFERENT TYPES OF FOSSILS

The four types of fossils are:-mold fossils-cast fossils

-trace fossils-true form fossils

MOLD FOSSILS

A mold fossil is a fossil that is molded onto a rock or mud if that the object turns into a mold or fossil it has to fossilize into something wet the dries up into something hard.

CAST FOSSILSCast fossils form when an organism dies and its body is covered by layers of sediment. As time passes, the organism itself, particularly when composed primarily of softer materials, is eroded and carried away, leaving a negative

imprint of its body.

TRACE FOSSILS

A trace fossil is also known as Ichnofossils. Ichnofossils are known as fossilized gastroliths burrows or footprints.

TRUE FORM FOSSILS

A true form fossil is fossils that are of the actual animal or animal part.

BRACHIOPOD

-Look like sea shells-Bottom of clams-Some drifted free-Some burrowed into the mud

CEPHALOPOD

-In the Octopus Family-Hard cone-shaped shell -Only its head and arm stuck out

BRYOZOAN

-Moss-animals-Look like twigs or coral-Several tiny animals which built houses around themselves

GASTROPOD

-Carry their homes on their back-Move about by broad, muscular feet

CRINOID

-Sea Lily-Related to starfish-May be able to see a five point star

HORN CORAL

-Looks like a bull’s horn or dinosaur’s tooth-Attached to the ocean floor in the mud

TRILOBITE

-Looks like a roly-poly bug-Related to modern day insects, spiders, lobsters, and crabs -Shed their hard outer coverings