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OREGON'S GEOLOGIC TIMELINE

Colored bars on the Oregon timeline correspond to geologic units. Click on a color bar or unit name to go to that unit description.

Earth timeline modified from This Dynamic Planet, U.S. Geological Survey Geologic Investigations Series Map I-2800.

Additional Resources

Oregon geologic time line

unit 20 unit 19 unit 18 unit 17 unit 16 unit 15 unit 14 unit 13 unit 12 unit 11 unit 10 unit 9 unit 8 unit 7 unit 6 unit 5 unit 4 unit 3 unit 2 unit 1