PRESERVED REMAINS OR TRACES OF AN ORGANISM THAT LIVED IN THE PAST.

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PRESERVED REMAINS OR TRACES OF AN ORGANISM THAT LIVED IN THE PAST. FOSSILS PRESERVED REMAINS OR TRACES OF AN ORGANISM THAT LIVED IN THE PAST.

Fossils are usually from more than 10,000 years ago… Fossils give clues to: 1.)The diversity of living things over Earth’s history. 2.) The past climate and surface changes. 3.) The changes with organisms over time (adaptations).

Top 10 Archeological Discoveries! Check it out… Top 10 Archeological Discoveries! Top 10 Archeological Discoveries

Fossils are categorized by… HOW THEY FORM! 1.) Mold Fossil: The cavity left behind after an organism decays. (Sediments bury an organism & sediments change into rock.) www.classzone.com/books/earth_science/terc/content/visualizations/es2901/es2901page01.cfm?chapter_no=29

2. Cast Fossil: A copy of the shape of an organism after the mold is filled in with sediment or mud that hardens. www.classzone.com/books/earth_science/terc/content/visualizations/es2901/es2901page01.cfm?chapter_no=29

3. Permineralized / Petrified Fossil: Water, containing minerals, soaks into the buried fossil, and replaces parts of the remains. Quartz How do fossils form?

4. Preserved /Original Remains Fossil: Decaying of organism is prevented by being trapped in rock, ice, tar or amber. Mammoth Discovery in Michigan in 2015

5. Carbonized Fossil: Organisms are pressed between layers of soft mud or clay that hardens squeezing the decaying organism away leaving the carbon “stamp” on the rock.

6. Trace Fossil: Forms when mud or sediment hardens to rock where a footprint, trail, or burrow of an organism was left behind.

Can you name the TYPE? On p. 3, try to identify the fossil type in the “fossil type” column. Use your notes.  1 4 3 2 5 6 7 8

More commonly known as the trilobite What is it? Elrathi More commonly known as the trilobite Most popular Index Fossil Oldest fossil out of the 8. Some swam and some remained on land. Cast/ OR

What is it? Mucrospirifer Thedfordensis Shelled marine organism; filter feeder. Cast/ OR

What is it? Tabulophyllum…. CORAL! Cast

What is it? Alethopteris Fern Family Carbon

What is it? Ammonite Closely related to the octopus and squid. Cast/ OR

What is it? Admetopsis SNAIL Family Cast/OR

What is it? Knightia Freshwater bony fish; lived in North America Carbon

What is it? Goniobasis Freshwater snails. Youngest fossil out of the 8. Permineralized