Geological Time Scale -Important Points - Picture and PDF

 The geologic time scale is a system of chronological measurement that relates stratigraphy to time, and is used by  scientists to describe the timing and relationships between events that have occurred throughout Earth's history.

Geological Time Scale Picture and PDF
Geological Time Scale Picture and PDF

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Important Points - 
Geological Time scale

  • Cambrian, Permian, Triassic, Cretaceous
  • Devonian- Carboniferous-Cretaceous- Eocene
  • Palaeozoic —> Mesozoic —> Coenozoic
  • The period which marks the first appearance of trilobites is Cambrian.
  • Cultural evolution of man occurred in the Quaternary period of Cenozoic era
  • The only animals of dinosaur lineage to survive the Cretaceous–Paleocene extinction event are  Aves.
  • Dinosaurs became completely extinct in Oligocene epoch
  • Coenozoic era : Angiosperms continued to diversity
  • Aves is considered as a direct descendent of dinosaurs.
  • In geological time scale which time periods is known as the age of gymnosperms: Triassic and Jurassic
  • Humans originated in the epoch known as Pleistocene


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