Preserved traces imprints Remains Paleontology "Paleo" = old Study of "old" or past life Fossils.

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Presentation transcript:

Preserved traces imprints Remains Paleontology "Paleo" = old Study of "old" or past life Fossils

Why Study Fossils Trace evolution of life Interpret past environments (e.g. ocean where today land)

10_04.jpg Dating Rocks using Fossils

ID_03.jpg Fossilization

Conditions which favor fossilization: Rapid burial (prevents decay) Hard parts (teeth, shells and bones last longer)

Unaltered Fossils La Brea Tar Pits Entrapment in tar Bones well preserved but weathered and often gnawed!

Unaltered Fossils Iceman found between Italy and Austria in 1991, 5,300 years old Insect in Amber

Trace Fossils Dinosaur Footprint

Mold and Casts - Horn Coral

Identification of fossils Shape Where Fossils are found Sedimentary rocks like limestone, dolostone, sandstone and shale

Index Fossils Survive as species for a short period of time Easily recognizable Widespread A single index fossil can narrow the age of a formation.

Fossil Assemblage Page 70