Geological time

By Iker Martín
  • Period: 570 BCE to 246 BCE

    PALAEOZOIC ERA

    Paleozoic era is a division of the geological timescale that belongs to the Phanerozoic eon
  • Period: 541 BCE to 485 BCE

    CAMBRIAN

    It is a division of the geological time scale that belongs to the Paleozoic Era; this is divided into six periods of which the Cambrian occupies the first place preceding the Ordovician. It began about 541 million years ago, after the Proterozoic Aeon, and ended about 485 million years ago.
  • 520 BCE

    FIRST INVERTEBRATES

    FIRST INVERTEBRATES
    About 3.5 billion years ago, the first microscopic organisms appeared in the ocean. The first invertebrates developed in the oceans. They were soft-bodied animals with a shell or carapace, such as these trilobites. Fish, like the agnathans, appeared. They appeared at the starts of the Cambrian period
  • Period: 485 BCE to 444 BCE

    ORDOVICIAN

    The Ordovician is the fragmentation of the geological time scale that belongs to the Paleozoic Era; this is divided into six periods of which the Ordovician occupies the second place after the Cambrian and preceding the Silurian.
  • 460 BCE

    WIDESPREAD MARINE ALGAE

    WIDESPREAD MARINE ALGAE
    Sponges, corals and even primitive fish lived in Ordovician waters. The plant life in the water was red and green algae. They appeared at the starts of the Ordovician period
  • Period: 444 BCE to 419 BCE

    SILURIAN

    The Silurian Period occurred from 443 million to 416 million years ago. It was the third period in the Paleozoic Era. It followed the Ordovician Period and preceded the Devonian Period. During this time, continental landmasses were low and sea levels were rising.
  • 431 BCE

    FIRST LAND PLANTS

    FIRST LAND PLANTS
    The first land plants appeared around 470 million years agO. They first appeard at the starts of the Silurian Period
  • Period: 419 BCE to 359 BCE

    DEVONIAN

    The Devonian Period occurred from 416 million to 358 million years ago. It was the fourth period of the Paleozoic Era. It was preceded by the Silurian Period and followed by the Carboniferous Period
  • 375 BCE

    FISH DIVERSIFY AND FIRST ANPHIBIANS

    FISH DIVERSIFY AND FIRST ANPHIBIANS
    These first tetrapods were amphibians and they evolved around 395 million years ago. They appeared at the starts of the Devonian period
  • Period: 359 BCE to 299 BCE

    CARBONIFEROUS

    The term "Carboniferous" comes from England, in reference to the rich deposits of coal that occur there. These deposits of coal occur throughout northern Europe, Asia, and midwestern and eastern North America.
  • 323 BCE

    FIRTS REPTILES

    FIRTS REPTILES
    Reptiles arose about 310–320 million years ago during the Carboniferous period.
  • Period: 299 BCE to 252 BCE

    PERMIAN

    The Permian is a division of the geological timescale that belongs to the Paleozoic Era; this is divided into six periods of which the Permian occupies the last place following the Carboniferous. It began about 299 million years ago and ended about 251 million years ago.
  • Period: 252 BCE to 66 BCE

    MESOZOIC ERA

    The Mesozoic known zoologically as the age of the dinosaurs or botanically as the age of the cycads
  • Period: 252 BCE to 201 BCE

    TRIASSIC

    The Triassic Period was the first period of the Mesozoic Era and occurred between 251 million and 199 million years ago. It followed the great mass extinction at the end of the Permian Period and was a time when life outside of the oceans began to diversify.
  • 232 BCE

    FIRST DINOSAURS

    FIRST DINOSAURS
    First Dinosaurs. Approximately 230 million years ago, during the Triassic Period, the dinosaurs appeared, evolved from the reptiles. Plateosaurus was one of the first large plant-eating dinosaurs, a relative of the much larger sauropods. It grew to about 9 meters in length.
  • Period: 201 BCE to 145 BCE

    JURASSIC

    The Jurassic perod is a geologic period and system that spanned 56 million years from the end of the Triassic Period 201.3 million years ago (Mya) to the beginning of the Cretaceous Period 145 Mya.
  • Period: 145 BCE to 66 BCE

    CRETACEOUS

    The Cretaceous Period was the last and longest segment of the Mesozoic Era. It lasted approximately 79 million years, from the minor extinction event that closed the Jurassic Period about 145.5 million years ago to the Cretaceous-Paleogene (K-Pg) extinction event dated at 65.5 million years ago.
  • 81 BCE

    FIRST PLANTS WITH FLOWERS

    FIRST PLANTS WITH FLOWERS
    The oldest so far discovered is the 130- million-year-old aquatic plant Montsechia vidalii unearthed in Spain in 2015. However it is thought that flowering plants first appeared much earlier than this, sometime between 250 and 140 million years ago. These plants appeared at the starts of the Cretaceous Period
  • Period: 66 BCE to 2 BCE

    TERTIARY

    Tertiary Period, interval of geologic time lasting from approximately 66 million to 2.6 million years ago. ... It is the traditional name for the first of two periods in the Cenozoic Era (66 million years ago to the present); the second is the Quaternary Period (2.6 million years ago to the present).
  • Period: 66 BCE to 10

    CENOZOIC ERA

    It is the last division of the geological time scale, within what makes up the Phanerozoic Eon together with the Paleozoic and Mesozoic eras.
  • 65 BCE

    EXTINCTION OF THE DINOSAURS

    EXTINCTION OF THE DINOSAURS
    The Cretaceous-Tertiary extinction event, or the K-T event, is the name given to the die-off of the dinosaurs and other species that took place some 65.5 million years ago.
  • 34 BCE

    DIVERSIFICATION OF MAMMALS

    DIVERSIFICATION OF MAMMALS
    Humans' early mammal relatives likely diversified 66 million years ago, after the extinction of dinosaurs opened up space for animals such as big cats, horses, elephants and eventually apes to evolve. ... "We can infer that some placental mammals did co-exist with dinosaurs," he said. The mammals appeard at the started of the Tertiary period
  • Period: 2 BCE to 50

    QUATERNARY

    The Quaternary period is a division of the geological time scale that belongs to the Cenozoic Era; within this, the Quaternary follows the Neogene. It began 2.59 million years ago and continues to the present day.