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Precambrian Period (4,600 MA)
EVENT 10 many stromatolites show how shallow seas covered much of Earth during times of this period. EVENT 11 half of the valuable mineral deposits globally form in the rocks during this period -
Period: to
A Diaz P6
Geological Timescale -
Cambrian Period (542 MA)
EVENT 22 Trilobites make an appearance EVENT 23 Shelled brachiopods appear -
Ordovician Period (488 MA)
EVENT 1 There is very little to almost no plant life at this period. EVENT 30 Colonies of (in)vertebrae appear and fish don't have jaws nor teeth and are covered in bony plates. -
Silurian Period (443 MA)
EVENT 24 Eurypterids sea stars and corral become more common EVENT 33 Vascular land animals related to the scorpion start to evolve on land -
Devonian Period (382 MA)
EVENT 31 Huge plants start to develop and early amphibians form EVENT 37 Age of fishes evolution, fish can now breath out of water and spend time on land form. -
Mississippian Period (359 MA)
EVENT 2 Swamps and forests spread at a rapid succession over land EVENT 21 Early representatives of large reptiles appear -
Pennsylvanian Period (318 MA)
EVENT 4 Giant cockroaches appear EVENT 15 Coal deposits form -
Permian Period (299 MA)
EVENT 8 Appalachian mountains are formed with collision of tectonic plates forming savannas as well EVENT 38 environmental change causes mass extinction including of sea invertebrates
