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Album caption:Two modes of occurrence of secondary anatase. (From 990.5 feet below top of core). Disseminated grains. Routt County, Colorado. 1972.(Photomicrograph) Published as figure 8-B in U. S. Geological Survey. Bulletin 1367. 1973.
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Album caption: Bleached porphyry of Hahns Peak. Dark quartz andesite porphyry dike rock. Routt County, Colorado. 1972. (Specimen) Published as figure 6 in U. S. Geological Survey. Bulletin 1367. 1973.
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Album caption: Silver-bearing tetrahedrite (tetrahedrons) and quartz crystals in small cavity (271.5 feet below top of core). Routt County, Colorado. 1972. Published as figure 9 in U. S. Geological Survey. Bulletin 1367. 1973.
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Album caption:Two modes of occurrence of secondary anatase. (From 990.5 feet below top of core). In microvugs. Routt County, Colorado. 1972. (Photomicrograph) Published as figure 8-A in U. S. Geological Survey. Bulletin 1367. 1973.
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Album caption: Typical pink zircon crystal occurring as accessory mineral (671 feet below top of core).Routt County, Colorado. 1972. (Photomicrograph) Published as figure 5 in U. S. Geological Survey. Bulletin 1367. 1973.
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Album caption: Pale-green botryoidal crusts of variscite lining a cavity (426 feet below top of core).Routt County, Colorado. 1972. (Photomicrograph) Published as figure 11 in U. S Geological Survey. Bulletin 1367. 1973.
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Album caption: Stralike platelet of pyrite (1,202 feet below top of core). Routt County, Colorado. 1972. (Photomicrograph) Published as figure 7 in U. S. Geological Survey. Bulletin 1367. 1973.


    map background search result map search result map Typical pink zircon crystal occurring as accessory mineral (671 feet below top of core).Routt County, Colorado. 1972. Bleached porphyry of Hahns Peak. Routt County, Colorado. 1972. Stralike platelet of pyrite (1,202 feet below top of core). Routt County, Colorado. 1972. Two modes of occurrence of secondary anatase.  Routt County, Colorado. 1972. Two modes of occurrence of secondary anatase. Routt County, Colorado. 1972. Silver-bearing tetrahedrite (tetrahedrons) and quartz crystals in small cavity (271.5 feet below top of core). Routt County, Colorado. 1972. Pale-green botryoidal crusts of variscite lining a cavity. Routt County, Colorado. 1972. Typical pink zircon crystal occurring as accessory mineral (671 feet below top of core).Routt County, Colorado. 1972. Bleached porphyry of Hahns Peak. Routt County, Colorado. 1972. Stralike platelet of pyrite (1,202 feet below top of core). Routt County, Colorado. 1972. Two modes of occurrence of secondary anatase.  Routt County, Colorado. 1972. Two modes of occurrence of secondary anatase. Routt County, Colorado. 1972. Silver-bearing tetrahedrite (tetrahedrons) and quartz crystals in small cavity (271.5 feet below top of core). Routt County, Colorado. 1972. Pale-green botryoidal crusts of variscite lining a cavity. Routt County, Colorado. 1972.