FOSSILS

Outline:

• Definiton

• How are fossils formed?

• Sedimentary rocks

• Types of fossils

• Importance of fossils

What is a fossil?

• Fossils are the preserved remains or traces of animals, plants, and other organisms from the remote past.

How is a fossil formed?

LayersSediment Movement Erosion

Sedimentary rocks

Sedimentary rocks :

• types of rock.

FIVE MAIN TYPES OF FOSSILS

Carbon Molds & CastsFilms

Trace fossils Preserved remains

PetrifiedFossils

Petrified fossils

• Petrified fossils minerals replace all

or part of an organism.

• Water through the layers of sediment.

• water evaporates.

A Mold

• A mold hard parts are buried.

Hard parts completely dissolve over time.

Leaving behind a hollow

area.

A cast

• Water with dissolved minerals and sediment

fills the mold

• Minerals and sediment make a cast.

Carbon films/fern fossils

• All living contains carbon.

• The thin layer of carbon

show an organism’s delicate parts

Trace fossils

• Trace fossils show the activities of organisms.

• Footprint

• Coprolite (dinosaur poop)

PRESERVED REMAINS

Amber Ice

What do fossils tell us?

• give clues.

• evidence about Earth’s.

• Fossils help scientists

References

• http://www.ehow.com/info_8451633_four-types-fossils.html

• http://elm404.tripod.com/fossil.htm

• http://en.wikipedia.org/wiki/Fossil

• http://www.scienceviews.com/dinosaurs/fossilformation.html

• http://www.ehow.com/info_8252244_five-types-fossils.html