fossils
Post on 17-Jul-2015
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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.
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)
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
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