Geology of National Parks - 2 views
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Kay Cunningham on 28 Feb 10Browse both 3D and standard photographic images of the United States National Parks. Selected field guides available. Subjects include igneous, sedimentary, and metamorphic rocks; weathering; glacier, coastal, and stream valley landforms; features of deserts and caverns; forests and plants; animals; native and prehistoric cultures; and man-made features.