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The Jurassic in Oregon, US

Jurassic in Oregon map

undifferentiated rock units help

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Quaternary
Tertiary
Cretaceous
Jurassic
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Silurian
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Precambrian

Jurassic Fossils
Fossil photos from Jurassic in Oregon

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Paleontology and geology

The Jurassic rocks of southwestern Oregon are the remains of volcanic island arcs that formed offshore from the North American mainland. Extinct, oyster-like animals lived in the temperate waters of this time and dominate the only known fossil reefs for this time period.


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