Roadside Geology of Oregon
	Quantity in Basket: None Code: 00826 Price: $16.00 Author: David D. Alt and Donald W. Hyndman ISBN: 878420630 Member Price: $13.60 Features: Paperback. 1978. 278 pp. Many black and white photos and simple maps. 6 x 9 x 0.75 in.
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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 the non-geologist how it happened, in clear and readable prose brightened by numerous sketches and photos.