geoligical time scale

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14 Terms

1
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oldest

hadean 4540-4000 Ma

2
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2nd oldest

archean 4000-2500 Ma

3
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3rd oldest

proterozoic 2500-540 Ma

4
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4 oldest (explosion of life)

cambrian 541-485 Ma

5
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5th oldest

ordovician 485-443 Ma

6
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6th oldest

silurian 443-419 Ma

7
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7th oldest

devonian 419-359 Ma

8
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8th oldest

carboniferous 359-299 Ma

9
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9th oldest

permian 299-252 Ma

10
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10th oldest

triassic 252-201 Ma

11
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11th oldest

jurrasic 201-145 Ma

12
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12th oldest

cretaceous 145-66 Ma

13
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13th oldest

Palogene 66-23 Ma

14
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14 oldest (newest)

neogene 23-0 (now) Ma