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Precambrian Time (4600)
1) Little amount of plant life
11) Nearly half of the valuable mineral deposits in the world occur in the rocks. -
Cambrian (542)
10) The presence of stromatolites indicates that shallow seas covered much of the Earth.
22) Trilobites appear -
Ordovician (488)
23) Shelled brachiopods appear
30) Colonies of tiny invertebrates call graptolites flourished and vertebrates appear. Fish didn't have jaws or teeth and their bodies were covered with bony plates. -
Silurian (444)
24) Eurypterids (sea scorpions), sea stars, and coral become more common.
33) Vascular land plants and animals, such as scorpions begin to evolve on land. -
Devonian (416)
31) Huge plants begin to develop, early amphibians form.
37) Age of Fishes, fish can breathe out of the watering spend time on land. -
Carboniferous Mississippian (359)
2) Swamps and forests cover the land.
34) Ichthyosaurs are living in the ocean, new invertebrates call ammonite develop. -
Carboniferous Pennsylvania (318)
4) Giant cockroaches appear
15) Coal deposits form -
Permian (299)
21) Early reptiles resembling large lizards appear.
38) Environmental change causes mass extinction of sea invertebrates as the sea retreated. -
Triassic (251)
16) Welcome to the word of the Dinosaur! Enter the squirrel sized dinosaur and the first forest dwelling mammals appear.
29) Small rodents evolve. -
Jurassic (200)
3) Flying reptiles called pterosaurs are in the air now.
13) Whoa, those dins are getting big and dominate the land - Lizard - hipped and bird - hipped appear - carnivores and herbivores have arrived. -
Cretaceous (146)
5) First flowering plants appear.
35) Impact hypothesis - dinosaur mass extinction. -
Paleocene (65.5)
6) Himalayas develop due to uplifting caused by the Indian subcontinent and the Eurasian continents colliding.
12) First pirates evolve. -
Eocene (55.8)
17) Flying squirrels, whales, and bats appear.
26) First modern horses appear.
file:///Users/monicadleal/Documents/eocene%20-%20Google%20Search.webarchive -
Oligocene (33.9)
27) Many early mammal become extinct, clams and snails flourish.
32)Antarctic icecaps begin to form.
file:///Users/monicadleal/Documents/oligocene%20plants%20-%20Google%20Search.webarchive -
Miocene (23)
8) Appalachian Mountains are created because of the collision of tectonic plates and savannah form.
18) Various species migrated between continents across land bridges. -
Pleistocene (1.8)
9) Homosapiens appeared and are hunters.
25) World wide temperature drops 4 degrees celsius. -
Anthropocene (present time)
7) Some scientists believe that human kind has caused mass extinction of plant and animal species, polluted the oceans and altered the atmosphere.
14) This is the argument as to when this epoch began. Some say that is began when the industrial age in the early 1800s. Others think it began with the atomic age in the 1950s.
