GEOLOGIC TIME. Time scale app?. PRECAMBRAIN. Longest era Earth was inhospitable Still cooling No atmosphere. Oldest known fossil 3.5 billion years cynobacteria Began producing oxygen Simple cell- no nucleus. STROMATOLITES. PALEOZOIC. Life flourishes in the ocean
Time scale app?
3.5 billion years
Began producing oxygen
Simple cell- no nucleusSTROMATOLITES
Sea life continues to flourishSILURIAN
Eventually created coal depositsCarboniferous(Mississippian & Pennsylvanian)
Life in sea and land thrivingPERMIAN
THE GREAT DYING
80% of species went extinct!
Dinosaurs get bigger
Dinosaurs go extinct