What is Geologic Time.Scale

The geologic time scale (GTS) is a system of chronological dating that relates geological strata to time. It is used by geologists, paleontologists and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history )

Geologists have divided Earth's history into a series of time intervals

The boundary between the Permian and Triassic is arked by a global extinction in which a large percentage of Earth's plant and animal species were eliminated

MYA ERA MYAEON Present MYA PERIOD MYA EPOCH UATERNARY 3 23 PLIOCENE 542 5.3 PALEOGENE CRETACEOUS MIOCENE 251 145 URASSI 23 199 2500 TRIASSI OLIGOCENE 251 PERMIAN 33.9 299 CARBONIFEROUS 3800 359 EOCENE DEVONIAN 416 SILURIAN 55.8 CAMBRIAN PALEOCENE 542 EDIACARAN

MYA ERA MYAEON Present MYA PERIOD MYA EPOCH UATERNARY 3 23 PLIOCENE 542 5.3 PALEOGENE CRETACEOUS MIOCENE 251 145 URASSI 23 199 2500 TRIASSI OLIGOCENE 251 PERMIAN 33.9 299 CARBONIFEROUS 3800 359 EOCENE DEVONIAN 416 SILURIAN 55.8 CAMBRIAN PALEOCENE 542 EDIACARAN

MYA ERA MYAEON Present MYA PERIOD MYA EPOCH UATERNARY 3 23 PLIOCENE 542 5.3 PALEOGENE CRETACEOUS MIOCENE 251 145 URASSI 23 199 2500 TRIASSI OLIGOCENE 251 PERMIAN 33.9 299 CARBONIFEROUS 3800 359 EOCENE DEVONIAN 416 SILURIAN 55.8 CAMBRIAN PALEOCENE 542 EDIACARAN

MYA ERA MYAEON Present MYA PERIOD MYA EPOCH UATERNARY 3 23 PLIOCENE 542 5.3 PALEOGENE CRETACEOUS MIOCENE 251 145 URASSI 23 199 2500 TRIASSI OLIGOCENE 251 PERMIAN 33.9 299 CARBONIFEROUS 3800 359 EOCENE DEVONIAN 416 SILURIAN 55.8 CAMBRIAN PALEOCENE 542 EDIACARAN

GEOLOGICAL TIME SCALE EON ERA PERIOD EPOCH AGE FEATURES EON ERA PERIOD EPOCH FEATURES Our geologic time scale was constructed to visually show the duration of each time unit. PRECAMBRIAN