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Texas Rocks! A Guide to Geologic Sites in the Lone Star State
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Roadside Geology of Arizona
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Death Valley Rocks!: Amazing Geological Sites in America's Hottest Park
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Where Do Mountains Come From, Momma?
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Where Do Rivers Go, Momma?
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Weird Rocks
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Roadside Geology of Northern and Central California
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101 American Fossil Sites You've Gotta See
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Roadside Geology of Washington
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Roadside Geology of Utah
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Geology Underfoot in Yellowstone Country
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Roadside Geology of West Virginia
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101 American Geo-Sites You've Gotta See
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Roadside Geology of Yellowstone Country
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Roadside Geology of Wyoming
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Roadside Geology of Colorado
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Roadside Geology of New Mexico
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Geology Underfoot on Colorado's Western Slope
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Roadside Geology of Maine
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Roadside Geology of Ohio
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Roadside Geology of Southern California
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Roadside Geology of Tennessee
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Roadside Geology of Hawaii
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Virginia Rocks!: A Guide to Geological Sites in the Old Dominon
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Roadside Geology of Nevada
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Roadside Geology of Idaho
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Roadside Geology of Alaska
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Geology Underfoot in Southern Utah
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Roadside Geology of Montana
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Roadside Geology of Oregon
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Michigan Rocks! A Guide to Geological Sites in the Great Lakes States
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Roadside Geology of Florida
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Geology Underfoot in Southern Idaho
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Oregon Rocks!: A Guide to 60 Amazing Geological Sites
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Geology Underfoot in Southern California
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Roadside Geology of Connecticut and Rhode Island
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