Transcript Create your own fossils!

FOSSILS
By: 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 phases
1.) Death
2.) Deposition
3.) Permineralisation
4.) Erosion
5.)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 FOSSILS
Cast 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