Geologic Time Scales

Geologic Time
Precambrian
Paleozoic Era
Cambrian Period
Ordovician Period
Silurian Period
Devonian Period
Carboniferous Period
Mesozoic Era
Triassic Period
Jurassic Period
Cretaceous Period
Cenozoic Era
Tertiary Period
Quaternary Period
Geologic Timeline


Web Sites

Paleozoic Era. UC Berkeley


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Geologic Time Scales

Quaternary Period

We are in the Quaternary Period, which started 1.8mya. The Quaternary Period saw major changes in Earth's climate, beginning with a major glaciation that did not end until some 10,000 years ago. During this period, man moved more towards an agricultural based society, which led to the development of more complex tools.

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