Early Geological Time Scale

Submitted by: Ali Rind

THE GEOLOGICAL TIME SCALE

The geological time scale (GTS) is a system of chronological measurement that relates stratigraphy to time, and is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships between events that have occurred throughout Earth’s history. The table of geologic time spans presented here agrees with the nomenclature, dates and standard color codes set forth by the International Commission on Stratigraphy.

FORMATION OF SOLAR SYSTEM

FORMATION OF EARTH

FORMATION OF FIRST DNA

FORMATION OF UNICELLULAR

FORMATION OF MULTICELLULAR

GEOLOGICAL EON

PHANEROZOIC ERA PRECAMBRIAN

PERIOD

HADEAN, ARCHEAN, PETROZOIC and PHANEROZOIC

CAMBRIAN PERIOD

SILURIAN PERIOD

ORDOVICIAN PERIOD

DEVONIAN PERIOD

CARBONIFEROUS PERIOD

CRETACEOUS PERIOD

PERMIAN PERIOD

MESOZOIC ERA

TRIASSIC PERIOD

JURASSIC PERIOD

CENOZOIC ERATERTIARY

PERIOD

TERTIARY PERIODAnimal

s

QUATERNARY PERIOD