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Event 10- The presence of stromatolites indicates that shallow seas covered much of Earth during intervals in this period
Event 11- Nearly half of the valuable mineral deposits in the world occur in the rocks of this period -
Geological Timescale
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Event 22- Trilobites appear
Event 23- Shelled brachiopods appear -
Event 8- Appalachian Mountains are created because of the collision of tectonic plates & savannahs form
Event 30- Colonies of tiny invertebrates call graptolites florished and vertibrates appear, Fish did not have jaws or teeth and their bodies were covered with bony plates -
Event 24- Eurypterids (sea scorpions), sea stars and coral become more common
Event 33- Vascular land plants and animals, such as scorpions begin to evolve on land -
Event 31- Huge plants begin to develop, early amphibians form
Event 37- Age of Fishes, fish that can breath out of the water and spend time on land form -
Event 2- Swamps and forests cover the land
Event 21- Early reptiles resembling large lizards appear -
Event 4- Giant cockroaches appear
Event 15- Coal deposits form -
Event 18- Various species migrated between continents across land bridges
Event 38- Environmental change causes mass extinction of sea invertibrates (trilobites & eurypterids) as the seas retreat -
Event 16- Welcome to the world of the Dinosaur! Enter the squirrel sized dinosaur & the first forest dwelling mammals appear
Event 34- Ichthyosaurs are living in the ocean, new invertebrates call ammonite develop -
Event 3- Flying reptiles called pterosaurs are in the air now
Event 13- Whoa those dinos are getting big & dominate the land - Lizard-hipped and bird-hipped appear - carnivores and herbivores have arrived -
Event 5- First flowering plants appear - angiosperm
Event 35- Impact hypothesis - dinosaur mass extinction -
Event 12- First primates evolve
Event 29- Smalll rodents evolve -
Event 17- Flying squirrels, whales and bats appear
Event 26- First modern horses appear -
Event 1- there is very little plant life during this period
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Event 20- Species that did not evolve to survive extreme cold moved to warmer climate areas or became extinct (dire wolf & giant ground sloth)
Event 36- Mediterranean Sea dries up and refills several times due to tectonic forcesa dn dropping sea levels -
Event 9- Homosapien (modern humans) appeared & are hunters
Event 27- Many early mammal become extinct, clams and snails flourish -
Event 6- Himalayas develop due to uplifting caused by the Indian subcontinent and Eurasian continents colliding
Event 19- The last glacial period ended and sea levels rose, Great Lakes formed -
Event 28- Modern human developed agriculture and used tools made of bronze and iron
Event 38- Antarctic icecaps begin to form -
Event 7- Some scientists believe that human kind has caused mass extinctions of plant and animal species, polluted the oceans and altered the atmosphere
Event 14- There is argument as to when this epoch began, some scientist think it began with the industrial age in the early 1800's other think it began with the atomic age in the 1950's
