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Photomicrograph of a group of minute apophylite crystals isolated from oil shale, showing nearly perfect prismatic crystals and also irregular forms. From a thin rich layer of oil shale in the "Mahogany ledge" at the U.S. Bureau of Mines experimental min in sec. 23, T. 6 S., R. 96 W. The grains are immersed in an oil which has a refractive index of 1.58; enlarged 500 diameters. Garfield County, Colorado. 1927. Plate 3-A in U.S. Geological Survey. Professional paper 158. 1930.
Categories: Image;
Tags: Bradley, W.H. Collection,
Garfield County, Colorado,
Mills, Mines, Quarries,
Photographers,
photo print
Contorted bedding due to differential compaction in a bed of oil shale near the mouth of Piceance Creek; Rio Blanco County, Colorado. July 30, 1925. Plate 14-A, U.S. Geological Survey. Professional paper 168. 1931.
Unusually large dreikanter of granite on the Lander road a few miles south of Pacific Springs. This dreikanter measures 71 cm by 46 cm deep and 37 cm wide. Sweetwater County, Wyoming. 1930.
Steep false bedding in a fine grained muddy sandstone of the delta facies in a small canyon tributary to Minnie Maud Creek; the steepness of the bedding is local and apparently due to differential compaction; near the Duchesne-Uintah County line. Utah. September 11, 1925. Plate 9-A, U.S. Geological Survey. Professional paper 168. 1931.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bradley, W.H. Collection,
Duchesne County, Utah,
Photographers,
photo print
Microfossil of the oil shale of the Green River formation: Tetraedron sp. cf. T. regulare. var. torsum (Turner) Brunnthaler. Colorado or Utah. 1925. Plate 21, figure 6, U.S. Geological Survey. Professional paper 168. 1931.
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OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bradley, W.H. Collection,
Colorado (CO),
Photographers,
Utah (UT),
photo print
Microfossil of the oil shale of the Green River formation: Spores. Colorado or Utah. 1925. Plate 23, figure 5, U.S. Geological Survey. Professional paper 168. 1931.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bradley, W.H. Collection,
Colorado (CO),
Photographers,
Utah (UT),
photo print
Microfossil of the oil shale of the Green River formation: Pollen similar to that of Quercus pinus. Colorado or Utah. 1925. Plate 24, figure 4, U.S. Geological Survey. Professional paper 168. 1931.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bradley, W.H. Collection,
Colorado (CO),
Photographers,
Utah (UT),
photo print
Upper surface of a tabellate reef with spongy surface; each molariform head is more or less columnar in section, though many of them are very irregular and complexly intergrown; 75% of natural size. Specimen is from about 530 feet above the base of the Green River formation on the divide between Douglas and East Salt Creeks. Garfield County, Colorado. August 18, 1925. Plate 43-A in U.S. Geological Survey. Professional paper 154. 1929.
Categories: Image;
Tags: Bradley, W.H. Collection,
Garfield County, Colorado,
Photographers,
photo print
Varves in organic marlstone from a bed about 1800 feet above the base of the Green River formation on Clear Creek in sec. 9, T. 5 S., R. 98 W. The darker bands of rock contain the most organic matter. Magnified 4 times. Garfield County, Colorado. 1927. Plate 11 in U.S. Geological Survey. Professional paper 158. 1930.
Categories: Image;
Tags: Bradley W.H. Collection,
Garfield County, Colorado,
Photographers,
photo print
Recent algal deposit from Green Lake, the upper rough part is grayish green, owing to the dense felt algae, whose tips were only incrusted with lime. The lower, smoother part, which was buried in a soft limy mud is yellowish gray, dense and without living algae. Onondaga County, New York. July 1926. Plate 29-B in U.S. Geological Survey. Professional paper 154. 1929.
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Tags: Bradley, W.H. Collection,
Onondaga County, New York,
Photographers,
photo print
Photomicrograph showing the association of the three principal types of structure found in the algae reefs of the Green River formation; small area of the reef shown in Bradley photo 209. In the lower right hand quarter is colony of the large spherical cells of Chlorellopsis colonata Reis, above that is a thick zone of typical spongy deposit, and at the top and also down the left side is an inorganic incrustation. Enlarged 10 diameters. From the Tipton tongue of the Green River formation, sec. 21, T. 4 N., R. 101 W: Sweetwater County, Wyoming. 1923. Top half is plate 34-A in U.S. Geological Survey. Professional paper 154. 1929.
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Tags: Bradley, W.H. Collection,
Photographers,
Sweetwater County, Wyoming,
photo print
Large pitted reef consisting of separate closely spaced, turbinate heads which rest upon a bed of smaller algal nodules. The nodule bed rest upon medium grained massive sandstone that is locally cross-bedded. The second and third heads to the left of man show fluting. The minimum time required for the formation of this reef is estimated at 355 years. Moffat County, Colorado. August 2, 1925. Plate 40-A in U.S. Geological Survey. Professional paper 154. 1929.
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Tags: Bradley, W.H. Collection,
Moffat County, Colorado,
Photographers,
photo print
Microfossil of the oil shale of the Green River formation: larva of Chironomidae. Colorado or Utah. 1927. Plate 28, figure 1 and 3, U.S. Geological Survey. Professional paper 168. 1931.
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Tags: Bradley, W.H. Collection,
Colorado (CO),
Photographers,
Utah (UT),
photo print
Microfossil of the oil shale of the Green River formation: spores resembling those of Macrosporuim. sp. Colorado or Utah. 1925. Plate 20, figure 9, U.S. Geological Survey. Professional paper 168. 1931.
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Tags: Bradley, W.H. Collection,
Colorado,
Photographers,
Utah,
photo print
Specimen of mosaic breccia in oil shale showing the contrast on a weathered surface between the flakes of very rich oil shale and the slightly less rich matrix; Uintah County, Utah. September 10, 1925. Plate 15-A, U.S. Geological Survey. Professional paper 168. 1931.
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Types: Map Service,
OGC WFS Layer,
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Tags: Bradley, W.H. Collection,
Photographers,
Uintah County, Utah,
photo print
Lower sandy part of the Bridger formation resting in evident conformity on the Green River formation, approximately in sec. 21, T. 11 S., R. 17: boundary of formation is about one third of the way up from bottom on the left side extending across to a slightly lower position on the right. Duchesne County, Utah. September 6, 1925. Plate 12-B, with graphics, U.S. Geological Survey. Professional paper 168. 1931.
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OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bradley, W.H. Collection,
Duchesne County, Utah,
Photographers,
photo print
Large lens of oil shale and organic marlstone in the muddy sandstone of the delta facies of the Green River formation; by differential compaction the top of this lens (upper right) has been depressed several feet below its original position: Near the boundary between Duchesne and Uintah Counties, Utah. September 9, 1925. Plate 10-A, with graphics, U.S. Geological Survey. Professional paper 168. 1931.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bradley, W.H. Collection,
Duchesne County, Utah,
Photographers,
Uintah County, Utah,
photo print
North across Henrys Fork, showing the south end of Cedar Mountain with its thick capping of the Bishop conglomerate, which contains a huge lens of coarser grained material that weathers into columnar forms. Below the conglomerate are tuffaceous beds of the Bridger formation. Sweetwater County, Wyoming. 1930. Plate 37-A, U.S.Geological Survey Professional paper 185-I. 1936.
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OGC WFS Layer,
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Tags: Bradley, W.H. Collection,
Photographers,
Sweetwater County, Wyoming,
photo print
Microfossil of the oil shale of the Green River formation: Zygospore, perhaps desmid. Colorado or Utah. 1925. Plate 23, figure 4, U.S. Geological Survey. Professional paper 168. 1931.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bradley, W.H. Collection,
Colorado (CO),
Photographers,
Utah (UT),
photo print
Polished vertical section of a reef formed of recumbent discoid colonies of Chlorellopsis coloniata Reis. The colonies near the center and upper parts of the specimen show faintly the concentric growth layers, which are convex outward along the radii of the colonies, natural size. Specimen is from 3700 feet above the base of the Green River formation on the west side of the Duchesne-Price mail road; T.6 S, R.7 W. Duchesne County, Utah. August 31, 1925. Plate 41-A in U.S. Geological Survey. Professional paper 154. 1929.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Bradley, W.H. Collection,
Duchesne County, Utah,
Photographers,
photo print
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