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


Return SAS Home
e-mail Kevin C. Hartzog

Geologic Time Scales

Cenozoic Era

Dating from 65mya - present, the Cenozoic Era began with a truly big bang, a meteor crashing into the Earth, causing a mass extinction of the large, dominant life forms of the Mesozoic Era, the dinosaur. This event also marked the beginning the the Age of Mammals, as mammals slowly invaded those niches left open by the extinct dinosaurs. During this era, birds, angiosperms (flowers), insects, and bony fish proliferated through nearly every habitat on Earth.