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Geologic Timeline
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Introduction

The timeline begins on the left and moves toward the present day at far right. The top line list the eons, Precambrian for example. The next line lists the eras. The Precambrian Eon, for instance, is divided into three eras, the Hadean, the Archaean and the Proterozoic. The third line is divided into the various periods. The Proterozoic Era is divided into the Paleoproterozoic, the Mesoproterozoic and the Neoproterozoic Periods. The fourth row lists epochs. Currently we are in the Holocene Epoch under the Quarternary Period under the Cenozoic Era under the Phanerozoic Eon. The bottom line displays a year listed under the particular time frame where that year would have occurred.

Timeline

Precambrian Eon 4.5 billion years to 544 million years

Phanerozoic Eon 544 million years to present

Hadean Era 4.5 billion years to 3.8 billion years

Archaean Era 3.8 billion years to 2.5 billion years

Proterozoic Era 2.5 billion years to 544 million years

Paleozoic Era 544 million years to 245 million years

Mesozoic Era 245 million years to 65 million years

Cenozoic Era 65 million years to present

Paleoproterozoic Period 2.5 billion years to 1.6 billion years

Mesoproterozoic Period 1.6 billion years to 900 million years

Neoproterozoic Period 900 million years to 544 million years

Cambrian Period 544 million years to 505 million years

Ordovician Period 505 million years to 440 million years

Silurian Period 440 million years to 410 million years

Devonian Period 410 million years to 360 million years

Carboniferous Period 360 million years to 286 million years

Permian Period 286 million years to 245 million years

Triassic Period 245 million years to 208 million years

Jurassic Period 208 million years to 146 million years

Cretaceous Period 146 million years to 65 million years

Tertiary Period 65 million years to 1.8 million years

Quaternary Period 1.8 million years to present

Mississippian Epoch 360 million years to 325 million years

Pennsylvanian Epoch 325 million years to 286 million years

Paleocene Epoch 65 million years to 54 million years

Eocene Epoch 54 million years to 38 million years

Oligocene Epoch 38 million years to 23 million years

Miocene Epoch 25 million years to 5 million years

Pliocene Epoch 5 million years to 1.8 million years

Pleistocene Epoch 1.8 million years to 11 thousand years

Holocene Epoch 11 thousand years to present

4 billion years ago

3 billion years ago

2 billion years ago

1 billion years ago

750 million years ago

500 million years ago

450 million years ago

430 million years ago

400 million years ago

350 million years ago

300 million years ago

250 million years ago

225 million years ago

175 million years ago

100 million years ago

60 million years ago

45 million years ago

30 million years ago

15 million years ago

3 million years ago

100 thousand years ago

Yesterday

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