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Precambrian #10 #11
The presence of stromatolites indicates that shallow seas covered much of Earth during intervals in this in this period.
Nearly half of the mineral deposits in the world occur in the rocks of this period. -
Period: to
A Antor P7
Geological Timescale -
Cambrian #22 #23
Trilobites appear.
Shelled brachiopods appear. -
Ordovician #1 #30
Colonies of tiny invertebrates call graptolites florished and vertebrates appear, Fish did not have jaws or teeth and their bodies were covered with bony plates.
There is little plant life during this period. -
Silurian #33 #24
Eurypterids (sea scorpions), sea stars and coral become more common.
Vascular land plants and animals, such as scorpions begin to evolve on land. -
Devonian #37 #31
Ages of fishes,fish can breath out of the water and spend time on land form.
Huge plants begin to develop, early amphibians form. -
Carboniferous #21 #15
Missisipi: Early reptiles resembling large lizards appear.
Pensylvania: Coal deposits form -
Permian #38 #8
Appalchian Mountains are created because of the collision of tectonic plates and savannahs form.
Environmental change causes mass extinction of sea invertebrates (trilotibates and eurypterids) as the seas retreat. -
Triassic #34 #16
Welcome to the world of dinosaur! Enter the squirrel sized dinosaur and the first forest dwelling mammals appear.
Ichthyosaurs are living in the ocean, new invertebrates call ammonite develop. -
Jurassic #2 #3 #13
Whoa those dinos are getting big and dominate the land- lizard hipped and bird hipped appear- carnivores and herbivores have arrived.
Flying reptiles called pterosaurs are in air now.
Swamps and forest cover land. -
Cretaceous #35 #5
First flowering plants appear - angiosperm
Impact hypothesis dinosaur mass extinction -
Paleocene #29 #12
Small rodents evolve.
First primates evolve. -
Eocene # 25 #17
Flying squirrels, whales and bats appears.
World wide temperatures drop about 4 degrees celsius (39.2 degrees fahrenheit) -
Oligocene #6 #27
Himalayas develop due to uplifting caused by the indian subcontinent and Eurosian continents colliding.
Many early mammal become extinct, clams and snails flourish -
Miocene #32 #36
Mediterranean Sea dries up and refills several times due to evolve on land.
Antarctic ice caps begin to form -
Pliocene #26 #18
First modern horses appear.
Varius species migrated between continents across land bridges. -
Pleistocene #20 #9
Homosapien (modern humans) appeared and are hunters.
Species that did not evolve to survive extreme cold moved to warmer climate areas or became extinct.
Homosapien (modern human) appeared and are hunters. -
Holocene #28 #19
The last glacial period ended and sea levels rose, Great Lakes formed.
Modern human developed agriculture and used tools made of bronze and iron -
Anthropocene #14 #7
Some scientist believe that human kind has caused mass extinctions of plant and animal species, polluted the oceans and altered the atmosphere.
There is an argument as to when this epoch began, some scientist think it began with the industrial age in the early 1800s other think it began with the atomic age in the 1950s.
