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Precambrian time
Event 8 Appalacian Mountains are created because of the collision of tectonic plates & savannahs form. Event 15 Coal deposites form. -
Period: to
E Puig- Period 6
geological timescale -
Cambrian
Event 23 shelled brachiopods appear. Event 22 Trilobites appear. -
Ordvician
Event 30 Colonies of tiny invertebrates called graptolites florished and vertibrates appear, fish did not have jaws or teeth and there bodies were covered with bony plates. -
Sillurian
Event 24 Eurypterids (sea scorpions), sea stars and coral become more common. Event 1 There is very little plant life during this period. -
Devonian
Event 37 Age of Fishes, fish that can breath out of water and spend time on land form. Event 31 Huge plants begin to develop, early amphibians form. -
mississippian period
Event 2 swamps and forests cover the land. Event 37 age of fishes, fish that can breath out of the water and spend time on land form -
pensylvanian period
Event 4 giant cockroaches appear. Event 21 early reptiles resembling large lizards apear -
permian
Event 6 Himalayas develop due to uplifting caused by the indian subcontinent and eurasian continents colliding. Event 3 Environmental change causes mass extinction of sea invertebrates (trilobites & eurypterids) -
Triassic
Event 16 Welcome to the world of the dinosaur! Enter the squirrel sized dinosaur & the first forest dwelling mammal appears. Event 34 Ichthyosaurs are living in the oceans, new invertibrates called ammonnite develop -
jurrassic
Event 13 whoa those dinos are getting big & dominate the land - Lizard hipped and bird hipped appear- carnivores and herbivores have arrived -
Cretaceous
Event 5 First flowering plants appear-angiosperm. Event 35 Impact hypothesis- dinosaur mass extinction -
Paleocene
Event 29 small rodents evolve. Event 12 first primates evolve -
Eocene
Event 17 flying squirrels, whales and bats appear. Event 25 World wide temperature drop about 4 degrees celsius (39.2 degrees Fahrenheit) -
oligocene
Event 6 Himalayas develop due to uplifting caused by the Indian subcontinent. Event 27 many early mammals become extinct, clams and snails flourish -
miocene
Event 32 Antarctic icecaps begin to form. Event 26 first modern horses appear. -
Pliocene
Event 16 various species migrated between continents across land bridges. Event 26 first modern horses appear -
Pliestocene
Event 20 Species that did not survive extreme cold moved to warmer areas or became extinct (dire wolf & ground sloth). Event 9 homosaipien appeared & are hunters -
holocene
Event 28 modern human developed agriculture and used tools made of bronze and iron. Event 19 Last glacial period ended and sea levels rose, great lakes formed. -
Anthropocene
Event 7 some scientist believe that human kind has caused mass extinctions of plant and animal species, polluted the oceans and altered the atmosphere.
