Roadside Geology of Oregon (Roadside Geology Series)
Sold Out / Out of Stock
Please be aware orders placed now may not arrive in time for Christmas, please check delivery times.
Roadside Geology of Oregon (Roadside Geology Series)
Used Book in Good Condition
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.