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Power resources --- Natural gas --- Petroleum --- Coal --- Prospecting --- Special issues --- Volcanic ash, tuff, etc. --- Geological time --- Geochemistry --- Power resources - Front Range (Colo. and Wyo.) --- Natural gas - Prospecting - Front Range (Colo. and Wyo.) --- Petroleum - Prospecting - Front Range (Colo. and Wyo.) --- Coal - Front Range (Colo. and Wyo.) --- Volcanic ash, tuff, etc. - Arizona - Chiricahua Mountains. --- Geological time - Arizona - Chiricahua Mountains. --- Geochemistry - Arizona - Chiricahua Mountains.
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Geochemistry --- Geology, Stratigraphic --- Volcanoes --- From 2 to 65 million years ago --- Nevada
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Mines and mineral resources --- Geology --- Weepah Spring Wilderness (Nev.) --- Nevada
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Geochemical surveys --- Geological mapping --- Boulder Batholith (Mont.)
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Volcanic ash, tuff, etc. --- Geology, Stratigraphic --- Geology, Stratigraphic --- Geochemistry --- Geology --- From 10 to 40 million years ago --- Nevada.
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Geochemistry --- Geochemistry --- California. --- Nevada.
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