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Oregon Rocks!: A Guide to 60 Amazing Geologic Sites
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Roadside Geology of Georgia
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New Mexico Rocks!: A Guide to Geologic Sites in the Land of Enchantment
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Rocks from Space
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Geology Underfoot in Southern California
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Roadside Geology of Kansas
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Roadside Geology of Maryland, Delaware, and Washington, D.C.
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Roadside Geology of New Jersey
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Arizona Rocks!: A Guide to Geologic Sites in the Grand Canyon State
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Geology Underfoot in Yosemite National Park
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Wisconsin Rocks! A Guide to Geologic Sites in the Badger State
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Idaho Rocks!: A Guide to Geologic Sites in the Gem State
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Colorado Rocks!: A Guide to Geologic Sites in the Centennial State
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California Rocks!: A Guide to the Geologic Sites in the Golden State
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Roadside Geology of South Dakota
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Roadside Geology of Connecticut and Rhode Island
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Geology Underfoot in Western Washington
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Geology Underfoot Along Colorado's Front Range
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Roadside Geology of Wisconsin
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Roadside Geology of Oklahoma
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Geology Underfoot in Northern Arizona
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Geology Underfoot in Death Valley and Eastern California
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Ohio Rocks: A Guide to Geologic Sites in the Buckeye State
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Roadside Geology of Indiana
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Ice Age Mammals of North America: A Guide to the Big, the Hairy, and the Bizarre
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Washington Rocks!: A Guide to Geologic Sites in the Evergreen State
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Roadside Geology of Mississippi
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Roadside Geology of Missouri
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Glacial Lake Missoula: And Its Humongous Floods
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Indiana Rocks!: A Guide to Geologic Sites in the Hoosier State
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