Roadside Geology of Oregon
ISBN-10:
0878420630
ISBN-13:
9780878420636
Author(s): David D. Alt; Donald W. Hyndman
Edition: First Edition
Description:
Until about 200 million years ago, the western margin of North America lay to the east, along the present Idaho border, and a broad coastal plain spread westward into Oregon. The rest of the state was ocean floor. Then the continent began moving slowly westward away from Europe and the floor of the Pacific Ocean began sliding beneath the western edge. That is what created Oregon, and this book tells how it happened.
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