Geologic Time Scale

  • Big Bang

    Big Bang
    According to the most recent measurements and observations, the Big Bang occurred approximately 13.75 billion years ago,which is thus considered the age of the Universe.
  • Birth of Earth

    Birth of Earth
    Over 4.4 billion years ago the earth was beginning to be formed. Lumps of dust came together in spinning spirals. The heavier dust sunk to the middle. There was alot of heat. Soon the dust melted into one solid ball, the earth. It took many, many, many years to make it look how it does today.
  • Precambrian Time

    Precambrian Time
    Not much is known about the Precambrian, despite its making up roughly seven-eighths of the Earth's history, and what little is known has largely been discovered in the past 50 years. The Precambrian fossil record is poor, and those fossils present are of limited biostratigraphic use.
  • Carboniferous Period

    Carboniferous Period
    The Carboniferous Period lasted from about 359.2 to 299 million years ago* during the late Paleozoic Era. The beginning of the Carboniferous generally had a more uniform, tropical, and humid climate than exists today. Seasons if any were indistinct.
  • Cambrian Time

    Cambrian Time
    The Cambrian is the first geological period of the Paleozoic Era.The Earth was generally cold during the early Cambrian, probably due to the ancient continent of Gondwana covering the South Pole and cutting off polar ocean currents.
  • Ordovician Time

    Ordovician Time
    The boundary chosen for the beginning both of the Ordovician Period and the Tremadocian stage is highly useful. Since it correlates well with the occurrence of widespread graptolite, conodont, and trilobite species, the base of the Tremadocian allows scientists not only to relate these species to each other, but to species that occur with them in other areas as well. This makes it easier to place many more species in time relative to the beginning of the Ordovician Period.
  • Silurian Period

    Silurian Period
    The Silurian was a time when the Earth underwent considerable changes that had important repercussions for the environment and life within it. One result of these changes was the melting of large glacial formations. This contributed to a substantial rise in the levels of the major seas
  • Devonian Period

    Devonian Period
    During the Devonian, two major animal groups colonized the land. The first tetrapods — land-living vertebrates — appeared during the Devonian, as did the first terrestrial arthropods, including wingless insects and the earliest arachnids. In the oceans, brachiopods flourished
  • Mississippian Period

    Mississippian Period
    The Caddoan Mississippian area, a regional variant of the Mississippian culture, covered a large territory, including what is now Eastern Oklahoma, Western Arkansas, Northeast Texas, and Northwest Louisiana.Mississippian peoples were almost certainly ancestral to the majority of the American Indian nations living in this region in the historic era
  • Pennsylvanian Period

    Pennsylvanian Period
    The Pennsylvanian was the time of the great 'Coal Swamp Forests' which dominated the equatorial regions of the planet. Typical Carboniferous forest, late Pennsylvanian. (screenshot from Prehistoric Park TV series)
  • Permian period

    Permian period
    With the formation of the super-continent Pangea in the Permian, continental area exceeded that of oceanic area for the first time in geological history. The result of this new global configuration was the extensive development and diversification of Permian terrestrial vertebrate fauna and accompanying reduction of Permian marine communities.
  • Triassic Period

    Triassic Period
    Dinosaurs, birds, rodents, sea monsters, sharks, and blood-red plankton. And the climate slowly started increasing.
    http://www.youtube.com/watch?v=4et9IEe148E
  • JurassicPeriod

    JurassicPeriod
    . The Jurassic constitutes the middle period of the Mesozoic Era, also known as the Age of Reptiles. The start of the period is marked by the major Triassic–Jurassic extinction event. However, the end of the period did not witness any major extinction event
  • Cretaceous Period

    Cretaceous Period
    Whether or not the asteroid or comet that carved the Chicxulub crater caused the extinction of more than half the planet's species at the end of the Cretaceous remains a matter of scientific debate. But the shifted continents, expanded coasts, and widened oceans had cooled and moistened the planet's climate and set in motion dramatic changes to the flora and fauna.
    http://www.huffingtonpost.com/2012/12/08/volcanoes-killed-dinosaurs-india_n_2258395.html?utm_source=Triggermail&utm_medium=email&utm
  • Eocene Period 9am

    Eocene Period 9am
    The Eocene began as a time of global warming, with temperatures across the planet soaring. Forests thrived and trees grew even in polar regions.
    http://www.blinkx.com/watch-video/eocene-epoch-florida-fossils-evolution-of-life-and-land/qTgZU_u5LyFAN3Wkf8ycQA
  • Tertiary and Quaternary periods

    Tertiary and Quaternary periods
    Teritary includes Paleogene, Eogene, Oligocene, Miocene, and Pilocene epochs. Quaternary includes Pleistocene and Holocene epochs.
  • Epochs Times

    Epochs Times
    -Paleocene 7am-Eocene 9am -Oligocene 12pm-Miocene 1pm-Pliocene 8pm-Pleistocene 11:30pm-Holocene 11:59pm
  • Holocene 11:59pm

    Holocene 11:59pm
    Climate has been fairly stable over the Holocene. Ice core records show that before the Holocene there was global warming after the end of the last ice age and cooling periods, but climate changes became more regional at the start of the Younger Dryas
  • Oligocene 12:00pm

    Oligocene 12:00pm
    The Oligocene epoch (39 to 22 million years ago) is the transition period between the earlier and later Tertiary period .This seaway withdrew at the close of Cretaceous time, and volcanoes of the Henry Mountains formed during the Oligocene Epoch.
    http://www.youtube.com/watch?v=PWjwHE6iJls
  • Paleocene Period 7am

    Paleocene Period 7am
    Because of the climatic conditions of the Paleocene, reptiles were more widely distributed over the globe than at present. Among the sub-tropical reptiles found in North America during this epoch are champsosaurs (aquatic reptiles that resemble modern gharials), crocodilia, soft-shelled turtles, palaeophi snakes, varanid lizards, and Protochelydra zangerli (similar to modern snapping turtles).