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

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Presentation transcript:

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).

Fossils are categorized by… HOW THEY FORM! 1.) Mold Fossil: Sediments bury an organism, and sediments change into rock; organism decays leaving a cavity.

2. Cast Fossil: Mold is filled in with sand or mud that hardens and makes a copy. erc/content/visualizations/es2901/es2901p age01.cfm?chapter_no=29

3. Petrified Fossil (Permineralized Fossil): Minerals soak into buried remains, replacing the remains and changing them into rock. Quartz

4. Preserved/Body (Original Remains) Fossil: Decaying of organism is prevented by being trapped in rock, ice, tar or amber.

5. Carbonized Fossil: Organisms are pressed between layers of soft mud or clay that hardens squeezing almost all the decaying organism away leaving the carbon imprint in the rock.

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

What is the goniobasis tenera? an extinct species of freshwater snails

What is it? Knightia Bony fresh water FISH!!!

What is the admetopsis subfusiformis? SNAIL Family

What is it? Same family as octopus and squid Ammonite

What is it? Tabulophyllum…. CORAL!

What is it? Sometimes known as “Butterfly Shell”, marine organism/ bottom dweller (brachiopod) Mucrospirifer Thedfordensis

What is it? Some swam and some remained on land. Elrathi Kingi aka trilobite Most popular Index Fossil