Phanerozoic Eon

Present-570 million years ago

Cenozoic Era (Present to 66 million years ago)

Quaternary period

Holocene Epoch (present-10,000)
Pleistocene Epoch (10,000-2,000,000)

Tertiary Period (2-66)

Neogene Period (2-24)

Pliocene (2-5)
Miocene (5-24)

Paleogene Period (24-66)

Oligocene (24-37)
Eocene (37-58)
Paleocene (58-66)

Mezozoic Era (66-245 million years ago)

Cretaceous (66-144)

Jurassic (144-208)

Triassic (208-245)

Paleozoic Era (245-570 million years ago)

Permian (245-286)

Carboniferous (286-360)

Pennsylvanian (286-320)
Mississippian (320-360)

Devonian (360-408)

Silurian (408-438)

Ordovician (438-505)

Cambrian (505-570)

Proterozoic Eon

570-2500 million years ago

Neoproterozoic Era (570-1000)
Mesoproterozoic (1000-1600)
Paleoproterozoic (1600-2500

Archean Eon

2.5-3.8 billion years ago

Late (2500-3000)
Middle (3000-3400)
Early (3400-3800)

Hadean Eon

3.8-4.6 billion years ago

No Record

Alternate listing from UAF geology department.

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This page last messed with spring 1999