num_pages: 280
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.
language: English
title: Roadside Geology of Oregon
titlecomplete: Roadside Geology of Oregon (Roadside Geology Series)
genres: Geology, Science, Field Guides, Reference, Nonfiction, Travel
ratings_count: 120
series: Roadside Geology Series
publisher: Mountain Pr