Cool geological layering

The Geological

  • precambrian

    precambrian
    14# there is an arguments as to when this epoch began, some scientist think it began with the industrial age in the early 1800 other in the atomic age in the 1950
  • Period: to

    V Rivera p-1

    geological timescale
  • cambrian

    cambrian
    22# trilobites
    23# shelled brachiopods appear
  • ordovician

    ordovician
    1# there is very little plant life during this period
    30# colonies of tiny invertebrates call graptolites flourished and vertebrates appear.........
  • silurian

    silurian
    24# eurypterids ( sea scorpions) sea stars and coral became more common
    33# vascular land plants and animals, such scorpions ........
  • devonian

    devonian
    31 huge plants being develop
    37 age of fishes, breath air out of water
  • carboniferos

    carboniferos
    2 swamps and forest
    4 giant cockroaches
    15 coal deposits
    21 reptiles resembling large lizards
  • permian

    permian
    10 shallows seas covered much of the earth during intervals in this period
    38 environmental change cause mass extinction in trilobites
  • triassic

    triassic
    16: welcome to the world dinosaur size of squirrel in forest the dwelling
    34: new invertebrates call ammonite developed
  • jurassic

    jurassic
    3: flying reptiles call pterosaurs
    13: dinos are getting bigger and dominate the land-exist liards-hipped and birds-hipped
  • cretaceous

    cretaceous
    5: first flowering plants appeared
    35: dinousaur mass extinction
  • paleocene

    paleocene
    27 early mammals become extinct
    29: smaller rotates evolved
  • eocene

    eocene
    17: flying squirrels whales and bats
    25: temperature dropped about 4 degrees celsius
  • oligocene

    oligocene
    6: himalayas developed due to uplifting cause by indian subcontinent
  • miocene

    miocene
    36: meditenarian sees dries up due to tectonic forsesa
  • pliocene

    pliocene
    18: various species migrate between continents
    26: first horses appered
  • pleistocene

    pleistocene
    20: species did not evolved to survived in cold and warmer climates
  • holocene

    holocene
    19: the last glacial period and sea levels roas
    28: human developed agriculture