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xGeological Time
( K = THOUSANDS OF YEARS AGO )
( M = MILLIONS OF YEARS AGO )
RECENT - 70 M CENOZOIC ERA
Recent - 3.7 M Quaternary Period
Recent - 10 K Holocene Epoch
10 K - 3.7 M Pleistocene Epoch
3.7 M - 70 M Tertiary Period
3.7 M- 9 M Pliocene Epoch
9 M - 24 M Miocene Epoch
24 M - 40 M Oligocene Epoch
40 M - 56 M Eocene Epoch
56 M- 70 M Paleocene Epoch
70 M - 245 M MESOZOIC ERA
70 M- 146 M Cretaceous Period
146 M - 200 M Jurassic Period
200 M- 245 M Triassic Period
245 M - 570 M PALEOZOIC ERA
245 M - 290 M Permian Period
290 M - 325 M Pennsylvanian Period
325 M - 360 M Mississippian Period
360 M - 410 M Devonian Period
410 M - 435 M Silurian Period
435 M - 515 M Ordovician Period
515 M - 570 M Cambrian Period
570 M- *4,500 M PRECAMBRIAN ERA
*4,500 M Approx origin of the Earth