Planeta tierra

The story of the earth

By usiauu13
  • Period: 4500 BCE to 541 BCE

    Precambrian

    Guide fossil: Stromatolitos
    Geological event: Formation of the lithosphere, the first mountain is formed, the first orogens.
    Climate event: First glaciations, it goes from being a reducing atmosphere (↓ O2) to an oxidizing one (↑ O2).
    Type of enviroment: Marine.
  • 1st life forms→ 4:10
    3500 BCE

    1st life forms→ 4:10

    Thus began an evolutionary process of animals and plants of which we have little data, since the first forms of life were microscopic and then soft animals and plants (algae, worms) that do not leave fossil remains.
  • 1st most complex life forms→ 9:07
    2100 BCE

    1st most complex life forms→ 9:07

    These are the multicellular organisms called multicellular, although they were still invertebrates.
  • Great explosion of life→ 21:10
    542 BCE

    Great explosion of life→ 21:10

    Was the sudden appearance and rapid diversification of complex multicellular macroscopic organisms in the early Cambrian period.
  • Period: 541 BCE to 252 BCE

    Paleozoic

    Guide fossil: Trilobites
    Geological event: It started with the cambrian explosion. It ended with the permian extintion. Intense vulcanism, Pangea and orogens.
    Climate event: Was characterized by the increase in the warmth of the planet.
    Type of enviroment: Land and marine.
  • Age of the fish→ 21:37 h
    419 BCE

    Age of the fish→ 21:37 h

    It is known as the Age of Fish, as it produced a considerable variety of fish.
  • First terrestrial plants (gymnosperms) → 21:48 h
    370 BCE

    First terrestrial plants (gymnosperms) → 21:48 h

    The first gymnosperm plants appear, one of the first being Elkinsia polymorpha.
  • Amphibian age → 22:13 h
    350 BCE

    Amphibian age → 22:13 h

    These evolved from freshwater fish with fleshy, lobed fins that looked like legs.
  • Age of the reptiles → 22:43 h
    310 BCE

    Age of the reptiles → 22:43 h

    It is known as "the age of reptiles" because it is the dominant group of vertebrates on land and in the seas.
  • Period: 250 BCE to 66 BCE

    Mesozoic

    Guide fossil: Amonites
    Geological events: The Pangea was fractured. A meteor hit.
    Climate events: Hot, dry climate and below sea level.
    There were no glaciations. Warm weather.
    Type of enviroment: Land.
  • 1st angiosperms→ 23:22 h
    130 BCE

    1st angiosperms→ 23:22 h

    Montsechia vidalii is the oldest angiosperm in the fossil record, dating back 130 million years.
  • Age of the birds→ 23:39 h
    110 BCE

    Age of the birds→ 23:39 h

    The oldest known bird is the famous Archeopteryx lithographica.
  • Period: 66 BCE to

    Cenozoic

    Guide fossil: Micro-mammal fossil.
    Geological events: Full development of the African orogeny.
    Climate events: Glacial or interglacial periods.
    Type of enviroment: Land.
  • 1st hominids→ 23:53 h
    2 BCE

    1st hominids→ 23:53 h

    A study in Science advanced the appearance of the genus Homo to 2.8 million years ago, according to the fossil remains of an uncategorized species found in Ethiopia. This would be the oldest known human.
  • 1st Homo sapiens→ 23:59 h
    1 BCE

    1st Homo sapiens→ 23:59 h

    The oldest remains attributed to Homo sapiens, dating back to 315,000 years, were found in Morocco.