The Paleontology of North America

The Jurassic in Oregon, US

 map

undifferentiated rock units

See exposures in this state from the:

Quaternary
Tertiary
Cretaceous
Jurassic
Triassic
Permian
Carboniferous
Devonian
Silurian
Ordovician
Cambrian
Precambrian

Jurassic Fossils
Fossil photos from Jurassic in Oregon

Previous (4 slides) Next

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.

Washington State Map Idaho State Map Nevada State Map California State Map