Post on 23-Feb-2016
description
PALEOZOIC ERA
Age of sea-life
CAMBRIAN
• 542 mya• Gondwanaland- mainly in S. Hemisphere• “waterworld”
CAMBRIAN LIFE
• Ocean life• Trilobites- over 800 species• First shells
Ordovician
• 505 mya• Mostly water (still)• Barren land
Ordovician
• Ocean life- warm reefs• Mollusk• Trilobites• Cephlapods• First fish
Ordovician fossils (IL)
Silurian
• 443 mya• Still Gondwanaland• North America under water
Silurian life
• Corals• Brachipods• Sea scorpions• First plants- ferns
Devonian
• 416 mya• Laurasia- northern hemisphere• Gondwanaland- southern hemisphere
Devonian
• Boney fish• Land plants• First amphibians
Age of fishes
Age of fishes
MISSISSIPPIAN
• 360 mya• Still Laurasia/ Gondwanaland• Many forest
MISSISSIPPIAN LIFE
• Insects• Amphibians• Large trees
• Coal products
PENNSYLVANIAN
• 320 mya• Pangaea begins to form
PENNSYLVANIAN LIFE
• Abundant insects• First reptiles
• Coal products
PERMIAN
• 286 mya• PANGEA is formed
• Forest of ferns
PERMIAN LIFE
• Ammonoids• Large amphibians• reptiles
Mass extinction
Siberian trapsMethane melting
What went extinct?
• Trilobites• Ammonites• Many fish species• Many coral species