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Chapter 3 - Coggle Diagram
Chapter 3
What are fossils
Fossil names
Death and decay ,
Process of sedimentation
Geographic processes ,
Weathering and erosion
Process of Fossilisation ( Page 94 )
Dating Techniques
Relative ( older vs younger )
Stratigraphy: principal of superposition ( lower down = older , higher = younger
Absolute Dating ( the exact age )
Preserving environments
Peat , Tar , Amber , Permafrost , Dry air
Examples of each
Tar ( Herbivores , Dinosaurs )
Index fossils
abundant
widespread,
easy to identify
lots of that species
short lived
Trilobites , Ammonites
Flurorine Dating
older fossils have more fluorine in comparison to older fossils
Carbon Dating , Radioisotope dating
Half life of C-14 is 5730 years whenever you half the amount of c-14 is 5730 years
Limitations,
tree ring dating
amount of rings shows age 1 ring = 1 year
Geological timeline
Bacteria, blue green algae
ray finned fish , lobe finned fish