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Early stage: blue-gray limestone or dolomite is somewhat fractured, cracks being filled with white dolomite; specimen is 3 inches long. Lake County, Colorado. 1929. Figure 21, in U.S.Geological Survey Professional Paper 235. 1953.
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Album caption and index card: The row of shrubs marking the predam high flood stage is catclaw and has persisted with little change through almost half the century. The new riparian community comprises several species, including saltcedar, seep willow, waterweed, Emory seep willow, cattail, and desert isocoma. A rock avalanche at upper right is new since 1923. The mouth of Kanab Creek is at left foreground. Grand Canyon National Park. Coconino County, Arizona. August 24, 1972. Published as Figure 57B in U.S. Geological Survey. Professional Paper 1132. 1980.
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Specimen: Gradation in altered augite monzonite from (right) fresh rock to (center) sericitized and chloritized rock to (left) rock composed of coarsely crystalline epidote and albite, Jumbo mine, Prince of Wales Island, Alaska. 1944. Figure 33, in U.S.Geological Survey Professional Paper 251. 1953.
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Sacramento porphyry; note more coarsely crystalline texture and darker color: length of specimen 4 inches. Lake County, Colorado. 1935. Figure 36, in U.S.Geological Survey Professional Paper 235. 1953.
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Silver Plume (?) granite; note finely crystalline texture and faintly trachitoid arrangement of crystals with banding parallel to long dimension of specimen; length of specimen 3 inches. Lake County, Colorado. 1929. Figure 10, in U.S.Geological Survey Professional paper 235. 1953.
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Haplophragmoides Ammobaculites. Northern Alaska. n.d. Plate 11 in U.S.Geological Survey Professional Paper 236. 1955.
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Johnson Gulch porphyry; note euhedral phenocrysts resembling those of Lincoln porphyry: length of specimen 3.5 inches. Lake County, Colorado. 1935. Figure 40, in U.S.Geological Survey Professional Paper 235. 1953.
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Pikes Peak (?) granite; note coarsely crystalline texture and conspicuous dark mineral; length of specimen, 3 inches long. Lake County, Colorado. 1929. Figure 8, in U.S.Geological Survey Professional Paper 235. 1953.
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Marginulinopsis, marginulina, rectoglandulina and lingulina. Northern Alaska. n.d. Published as plate 44 in U.S.Geological Survey Professional Paper 236. 1962.
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Advanced stage: limestone almost wholly replaced and dark blotches also no longer conspicuous; specimen is 3 inches in length. Lake County, Colorado. 1929. Figure 23, in U.S.Geological Survey Professional Paper 235. 1953.
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Specimen: slight scour at top of diatomaceous upper layer of a rhythmite. Los Angeles County, California. 1931. Plate 15-C, in U.S.Geological Survey Professional Paper 212. 1943.
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Specimen: Magnetite-diopside intergrowths replacing marble, upper magnetite bodies, Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 23, in U.S.Geological Survey Professional Paper 251. 1953.
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Album caption: Mature loess-Kansan erosion topography. North fork of Skunk River, one mile northeast of Rhodes. Kansan drift area. Rhodes Township, Sec. 3 and 10, T. 82 N., R. 20 W. Marshall County, Iowa. July 1, 1914.
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Iowa Gulch porphyry, showing flow banding in dense stony phase: length of specimen 4.5 inches. Lake County, Colorado. 1935. Figure 39, in U.S.Geological Survey Professional Paper 235. 1953.
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Part of cross section of nodule-bed specimen. Specimen from locality pictured in photo no. tha00033. Many small nodules and fragments of fish teeth and bones make up groundmass of the larger nodules. The matrix is cemented with pyrite, much of which has altered to iron oxides and gypsum along bottom and top of bed. The light-colored streak at the left is ferruginous gypsum. Custer County, South Dakota. Circa 1967. Published as figure 5 in U.S. Geological Survey Professional Paper 594-L. 1968.
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Opaline diatoms obtained from the digestion with acid; of part of the specimen shown in photo 26. San Luis Obispo County, California. 1931. Plate 11-B, in U.S.Geological Survey Professional Paper 212. 1943.
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Altamira member of Monterey Shale: Local discontinuity or bedding plane fault, foot of sea cliff east of Point Fermin. Los Angeles County, California. 1921. Published as plate 7-B, U.S.Geological Survey Professional paper 207. 1946.
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Specimen: Bedding planes in marble, preserved by garnet. Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 22, in U.S.Geological Survey Professional Paper 251. 1953.
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Evans Gulch porphyry showing relatively finely crystalline, equigranular texture: length of specimen 4 inches. Lake County, Colorado. 1935. Figure 34, in U.S. Geological Survey Professional Paper 235. 1953.


map background search result map search result map Mature loess-Kansan erosion topography. Marshall County, Iowa. 1914. Silver Plume (?) granite; note finely crystalline texture and faintly trachitoid arrangement of crystals with banding parallel to long dimension of specimen. Lake County, Colorado. 1929. Pikes Peak (?) granite; note coarsely crystalline texture and conspicuous dark mineral; length of specimen, 3 inches long.  Lake County, Colorado. 1929. Early stage: blue-gray limestone or dolomite is somewhat fractured, cracks being filled with white dolomite; specimen is 3 inches long. Lake County, Colorado. 1929. Advanced stage: limestone almost wholly replaced and dark blotches also no longer conspicuous; specimen is 3 inches in length.  Lake County, Colorado. 1929. Evans Gulch porphyry showing relatively finely crystalline, equigranular texture: length of specimen 4 inches.  Lake County, Colorado. 1935. Sacramento porphyry; note more coarsely crystalline texture and darker color: length of specimen 4 inches. Lake County, Colorado. 1935. Iowa Gulch porphyry, showing flow banding in dense stony phase: length of specimen 4.5 inches. Lake County, Colorado. 1935. Johnson Gulch porphyry; note euhedral phenocrysts resembling those of Lincoln porphyry: length of specimen 3.5 inches. Lake County, Colorado. 1935. Opaline diatoms obtained from the digestion with acid; of part of the specimen shown in photo 26. San Luis Obispo County, California. 1931. Specimen: slight scour at top of diatomaceous upper layer of a rhythmite. Los Angeles County, California. 1931. Specimen: Bedding planes in marble, preserved by garnet. Jumbo Basin, Prince of Wales Island, Alaska. 1944. Specimen: Magnetite-diopside intergrowths replacing marble, upper magnetite bodies, Jumbo Basin, Prince of Wales Island, Alaska. 1944. Specimen: Gradation in altered augite monzonite from (right) fresh rock to (center) sericitized and chloritized rock to (left) rock composed of coarsely crystalline epidote and albite, Jumbo mine, Prince of Wales Island, Alaska. 1944. Altamira member of Monterey Shale. Los Angeles County, California. 1921. Stromatolite specimen from Helena Dolomite. Sun River Canyon project. Montana. 1965. Haplophragmoides Ammobaculites. Northern Alaska. n.d. Marginulinopsis, marginulina, rectoglandulina and lingulina. Northern Alaska. n.d. Part of cross section of nodule-bed specimen. Custer County, South Dakota. Circa 1967. The row of shrubs marking the predam high flood stage is catclaw and has persisted with little change through almost half the century. Grand Canyon National Park, Coconino County, Arizona. 1972. Mature loess-Kansan erosion topography. Marshall County, Iowa. 1914. Part of cross section of nodule-bed specimen. Custer County, South Dakota. Circa 1967. Opaline diatoms obtained from the digestion with acid; of part of the specimen shown in photo 26. San Luis Obispo County, California. 1931. Specimen: slight scour at top of diatomaceous upper layer of a rhythmite. Los Angeles County, California. 1931. Altamira member of Monterey Shale. Los Angeles County, California. 1921. Specimen: Bedding planes in marble, preserved by garnet. Jumbo Basin, Prince of Wales Island, Alaska. 1944. Specimen: Magnetite-diopside intergrowths replacing marble, upper magnetite bodies, Jumbo Basin, Prince of Wales Island, Alaska. 1944. Specimen: Gradation in altered augite monzonite from (right) fresh rock to (center) sericitized and chloritized rock to (left) rock composed of coarsely crystalline epidote and albite, Jumbo mine, Prince of Wales Island, Alaska. 1944. The row of shrubs marking the predam high flood stage is catclaw and has persisted with little change through almost half the century. Grand Canyon National Park, Coconino County, Arizona. 1972. Silver Plume (?) granite; note finely crystalline texture and faintly trachitoid arrangement of crystals with banding parallel to long dimension of specimen. Lake County, Colorado. 1929. Pikes Peak (?) granite; note coarsely crystalline texture and conspicuous dark mineral; length of specimen, 3 inches long.  Lake County, Colorado. 1929. Early stage: blue-gray limestone or dolomite is somewhat fractured, cracks being filled with white dolomite; specimen is 3 inches long. Lake County, Colorado. 1929. Advanced stage: limestone almost wholly replaced and dark blotches also no longer conspicuous; specimen is 3 inches in length.  Lake County, Colorado. 1929. Evans Gulch porphyry showing relatively finely crystalline, equigranular texture: length of specimen 4 inches.  Lake County, Colorado. 1935. Sacramento porphyry; note more coarsely crystalline texture and darker color: length of specimen 4 inches. Lake County, Colorado. 1935. Iowa Gulch porphyry, showing flow banding in dense stony phase: length of specimen 4.5 inches. Lake County, Colorado. 1935. Johnson Gulch porphyry; note euhedral phenocrysts resembling those of Lincoln porphyry: length of specimen 3.5 inches. Lake County, Colorado. 1935. Stromatolite specimen from Helena Dolomite. Sun River Canyon project. Montana. 1965. Haplophragmoides Ammobaculites. Northern Alaska. n.d. Marginulinopsis, marginulina, rectoglandulina and lingulina. Northern Alaska. n.d.