Geologicaltimescale4

Cole's geo timeline

By horancol
  • 541 BCE

    cambrian

    cambrian
    incredible burst of evolution and complex life forms emerge. large hard body creatures emerge. trilobites dominated. supercontinent rodinia broke apart.
  • 485 BCE

    ordovician

    ordovician
    A variety of sea life flourished. first plants arrived on land. and second largest mass extinction. nautiloids dominated.
  • 443 BCE

    silurian

    silurian
    sea levels rise, and first animals walk on land. Huge reef systems formed followed by sponges and coral. diverse fish also arrived along with planktonic creatures. Sea scorpions and eurypterids dominated. first sharks arrive.
  • 416 BCE

    devonian

    devonian
    Age of armored fish. supercontinent Euramerica formed. shark ancestors. first amphibians walk on land and plant life begins to spread more on to land. Mass extinction killed 70% of life.