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Roadside Geology of Idaho (Roadside Geology Series)
Product Review "If you like to stretch your mind, you'll like this bookContinents collide. Giant slabs of rock slide miles down slope. Huge meteorites crash to earth." --Northwest Travel Product Description From the ancient sedimentary formations in the north through the overthrust belt in the southeast, Idaho's rocks are as interesting as rocks come. The authors know these rocks well through their years of research in Idaho, which led to their theory explaining the flood basalts of the Columbia Plateau and the hotspot track of the Snake River Plain as the results of a giant meteorite impact that happened about 17 million years ago. Reader Reviews As always, David Alt and Donald Hyndman team up to provide a very readable expert presentation of the current and past geology of a state with a very dynamic geological past and present. As a non-geologist who doesn't plan to visit Idaho anytime soon, I still learned plenty about how geology works from the discussion, drawings and photos of many specific sites and regions. 100 million years ago, Idaho was part of the western shore of North America. You'll learn where to find evidence of the collision that ended this era. You will learn about the many Ice Age lake megafloods that left their marks on the major river valleys. Nearly all the surface of the state is dominated by a diverse collection of igneous rocks from at least 5 major events over the past 100 million years, one or two of which are still active. You will have to read the book to discover all the other interesting details. Comment | | (Report this)
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