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Roadside Geology of Idaho


Roadside Geology of Idaho

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SKU
GB-43010001
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3 available
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1.70 lbs
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$20.00
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$15.00 (Save 25%)

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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.

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    The geology of Colorado has not changed much since the first edition of Roadside Geology of Colorado in 1980, but the understanding of geology has--particularly the comprehension of billion-year-old granites and gneisses of Precambrian time that form the core of the Rocky Mountains. With improved age-dating techniques geologists can now distinguish Precambrian rocks of different ages, giving readers more detailed maps and a more accurate interpretation of the rock history passing beneath their tires and outside their car windows.

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    Montana's geologic history includes a long succession of disturbances that changed the rocks, then changed many of them again. Unraveling these events reveals a geologically quiet continent that got scrambled in a long and grinding collision with the Pacific crustal plate. Through detailed geologic maps and lively text, Roadside Geology of Montana deciphers the complicated rock record and uncovers each layer of Big Sky Country.

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    Map locates deposits of actinolite, agate, amazonite, amethyst, anthophylite, apatite, arsenopyrite, azurite, barite, beryl, broznite, calcite, cassiterite, cerussite, chert, chalcopyrite, chryscolla, corundum, diopside, enargite, epidote, flourite, fossil, garnet, geodes, hematite, meminorphite, heulandite, heubnerite, jasper, kyanite, limonite, magnetite, malachite, muscovite, olivine, opal, orthoclase, parisite, petrified wood, psilomelane, pyrite, pyrolusite, pyrrhotite, quartz, rhodochrosite, rhyolite, sapphire, selenite, serpentine, scheelite, spinel, staurolite, stibbnite, titanite, topaz, vesuvianite, wulfenite, and zeolite.

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