Preceden

Untitled timeline

ERAS

Paleozoic

542000000 bc - 251000000 bc

http://essayweb.net/geology/timeline/images/ordovician_life.jpg

Mesozoic

251000000 bc - 65500000 bc

http://palaeos.com/mesozoic/images/diplodocus.jpg

Cenozoic

65500000 bc - 2013

http://static.ddmcdn.com/gif/willow/cenozoic-era-info0.gif

Paleozoic Era

Cambrian

542000000 bc - 488000000 bc

Evolution?

542000000 bc - 251000000

The 320-odd million years of the Paleozoic era saw many important events, including the development of most invertebrate groups, life's conquest of land, the evolution of fish, reptiles, insects, and vascular plants, the formation of the supercontinent of Pangea, and no less than two distinct ice ages. The earth rotated faster than it does today so days were shorter, and the nearer moon meant stronger tides.
Many organisms evolve, and grow backbones.

This came from http://wiki.answers.com/Q/Major_geologic_events_in_paleozoic_era

mass extinction

542000000 bc - 251000000 bc

Basically, a lot of species began to evolve. Unfortunetly, a mass extinction took place near the end of the era and destroyed as much as 95% of the ocean life.

Ordovician

488000000 bc - 444000000 bc

Silurian

444000000 bc - 416000000 bc

Devonian

416000000 bc - 359000000 bc

Carbiniferous

359000000 bc - 300000000 bc

Permian

300000000 bc - 251000000 bc

Mesozoic Era

Modern life!

251000000 bc - 65500000 bc

the Mesozoic Era was a time of tectonic, climatic and evolutionary activity. the continents gradually shifted from a state of connectedness into their present configuration; the drifting provided for speciation and other important evolutionary developments. the climate was exceptionally warm throughout the period, also playing an important role in the evolution and diversification of new animal species. by the end of the era, the basis of modern life was in place.

This is from http://answers.yahoo.com/question/index?qid=20090407075738AA1h7Z0

Pangea

251000000 bc - 65500000 bc

At the beginning of the Mesozoic Era all the continents moved together to form a huge supercontinent, Pangaea. This meant, for example, that animals of the Mesozoic living in what is today east Africa could stroll over to Brazil without getting their feet wet! As time went on, Pangaea split up and continents went their own way, severing links among previously connected land masses.

Triassic

251000000 bc - 200000000 bc

Jurrasic

200000000 bc - 145500000 bc

Cretaceous

145500000 bc - 65500000 bc

Cenozoic Era

end of iceage

65500000 bc - 2013

An event that happened would be the ending of the Ice age and the beginning of mammals and plants, or even the formations of the major landforms we have today. Such as the beginning of the Alps, or the Himalayas. The pollen and fruit count even increased through the Cenozoic Era.

Paleogene

65500000 bc - 23000000 bc

Neogene

23000000 bc - 2588000 bc

Quaternary

2588000 bc - present

Thespesius