Microraptor gui holotype

Geological Timescale Timeline Project

By SpringJumper

  • Precambrian

    Precambrian
    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
  • Period: to

    A Gottesman P.4

    Geological Timescale

  • Cambrian

    Cambrian
    Event 22- Trilobites appear
    Event 23- Shelled brachiopods appear

  • Ordovician

    Ordovician
    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

  • Silurian

    Silurian
    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

  • Devonian

    Devonian
    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

  • Mississippian Period

    Mississippian Period
    Event 2- Swamps and forests cover the land
    Event 21- Early reptiles resembling large lizards appear

  • Pennsylvanian period

    Pennsylvanian period
    Event 4- Giant cockroaches appear
    Event 15- Coal deposits form

  • Permian

    Permian
    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

  • Triassic

    Triassic
    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

  • Jurrasic

    Jurrasic
    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

  • Cretaceous

    Cretaceous
    Event 5- First flowering plants appear - angiosperm
    Event 35- Impact hypothesis - dinosaur mass extinction

  • Paleocene

    Paleocene
    Event 12- First primates evolve
    Event 29- Smalll rodents evolve

  • eocene

    eocene
    Event 17- Flying squirrels, whales and bats appear
    Event 26- First modern horses appear

  • Oligocene

    Oligocene
    Event 1- there is very little plant life during this period

  • Miocene

    Miocene
    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

  • Pliocene

    Pliocene
    Event 9- Homosapien (modern humans) appeared & are hunters
    Event 27- Many early mammal become extinct, clams and snails flourish

  • Pleistocene

    Pleistocene
    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

  • Holocene

    Holocene
    Event 28- Modern human developed agriculture and used tools made of bronze and iron
    Event 38- Antarctic icecaps begin to form

  • Anthropocene

    Anthropocene
    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