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Photomicrograph of polished section of pitchblende ore from the Wood Mine, Quartz Hill, Gilpin County, Colorado; showing botryoidal forms characteristic of much of the pitchblende, Py marks pyrite. Plate 2-B, with graphics, in U.S. Geological Survey. Professional paper 90. 1915.
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Outwash plain of later glacial epoch: in valley of Middle Boulder Creek, between Eldora and Nederland, looking eastward. Boulder County, Colorado. Circa 1911. Plate 12-A in U.S. Geological Survey. Professional paper 94. 1917.
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Radiating intergrowths of quartz (white) and ferruginous rhodochrosite (gray) with small patches of finely divided sulphides (black); photomicrograph (ordinary light) of this thin section of ore from 1000-foot level, Belmont vein. Nye County, Nevada. 1915. Plate 6- A in U.S. Geological Survey. Professional paper 104. 1918.
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Electrum showing crystal outlines associated with quartz and sulphides. The argentite was very probably formed by the replacement of galena, but all the other minerals are believed to be alpha hypo gene. Photomicrograph of polished surface of ore from 1,260- foot level, Murray vein, Tonopah Extension mine. Nye County, Nevada. 1915. Plate 5- B, with graphics, in U.S. Geological Survey. Professional paper 104. 1918.
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Irregular intergrowth of polybasite, probably alpha hypo gene, with quartz and pyrite; photomicrograph of polished surface of ore just above 500-foot level, West End vein, West End mine. Nye County, Nevada. 1915. Plate 4-A, with graphics, in U.S. Geological Survey. Professional paper 104. 1918.
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Muscovite-rich zones in pegmatite, G.D. Willes Feldspar quarry, Topsham Sagadahoc County, Maine. 1906. Plate 9-A in U.S. Geological Survey. Bulletin 445. 1911.
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Exposure of crumpled schist of the Idaho Springs formation in Virginia Canyon, near Seaton Gulch; the lighter bands are injections of pegmatite. Clear Creek County, Colorado. Circa 1911. Plate 10-A in U.S. Geological Survey. Professional paper 94. 1917.
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Rock outcrops flanked by flats of glacio-marine gravels, northern part city of Eastport. The form of the outcrops is suggestive of wave erosion. Washington County, Maine. 1913. Plate 13 in U.S. Geological Survey. Folio 192. 1914.
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Boulder strewn tidal flat, east shore of Lubec Neck. Washington County, Maine. 1913. Plate 15 in U.S. Geological Survey. Folio 192. 1914.
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Photomicrograph: lean iron ore from Caribou, showing magnetite and ilmenite, augite and serpentine, black areas are magnetite and ilmenite, white areas are serpentine formed by alteration of olivine; some unaltered olivine remains and is gray. Colorado. Circa 1911. Plate 11-C, enlarged 29 diameters, in U.S. Geological Survey. Professional paper 94. 1917.
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Album caption and index card: Feldspar mill, showing naturral dam suppplemented by small artificial dam. Cathance River near Cathance Sta., Topsham. View from west. See Note-book 11, p. 64. Sagadahoc County, Maine. July 26, 1906.
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General view of the tourmaline quarry at Mount Mica in November 1908, looking west, the upper layers of rock in the middle ground are the schist capping. Oxford County, Maine. 1908.
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Hornblende schist of Idaho Springs formation: intruded by pegmatite near Eldora. Boulder County, Colorado. Circa 1911. Plate 12-B in U.S. Geological Survey Professional Paper 94. 1917.
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Electrum (stippled) irregularly intergrown with sphalerite and quartz; the argentite shown in this photograph was probably formed by the replacement of (beta hypo gene) of galena all the other minerals, including the electrum, are believed to be alpha hypo gene; Photomicrograph of polished surface of ore from 1,050-foot level, Macdonald vein, North Star Mine. Nye County, Nevada. 1915.
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Banded hypo gene ore: Murray vein, Tonopah Extension mine, just below 950-foot level, one-half natural size. Nye County, Nevada. 1915. Portion is plate 1-B in U.S. Geological Survey. Professional paper 104. 1918.
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Hill northwest of Johnson cove, view looking east, showing the cliff-like profile of the south end of the hill, due possibly to marine erosion. The cliff is fronted on the south by gravels with "foreset" beds. Washington County, Maine. 1913. Plate 12 in U.S. Geological Survey. Folio 192. 1914.
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Polybasite probably super gene partly filling fractures in white, opaque quartz; in a few places finely crystalline chalcopyrite and in one place a little native silver are deposited on the polybasite, Macdonald vein, Montana-Tonopah mine. Nye County, Nevada. 1915. Plate 12-A in U.S. Geological Survey. Professional paper 104. 1918.
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Large single crystal of tourmaline from Mount Mica, natural size, from the same pocket a the giant tourmaline shown in Bastin 225; bar scale equals 1 inch. Oxford County, Maine. Plate 15 in U.S. Geological Survey. Bulletin 445. 1911.


map background search result map search result map Boulder strewn tidal flat, east shore of Lubec Neck. Washington County, Maine. 1913. Rock outcrops flanked by flats of glacio-marine gravels, northern part city of Eastport. Washington County, Maine. 1913. Hill northwest of Johnson cove, view looking east, showing the cliff-like profile of the south end of the hill. Washington County, Maine. 1913. Exposure of crumpled schist of the Idaho Springs formation in Virginia Canyon, near Seaton Gulch; the lighter bands are injections of pegmatite. Clear Creek County, Colorado. Circa 1911. Hornblende schist of Idaho Springs formation: intruded by pegmatite near Eldora. Boulder County, Colorado. Circa 1911. Radiating intergrowths of quartz (white) and ferruginous rhodochrosite (gray) with small patches of finely divided sulphides (black); photomicrograph (ordinary light) of this thin section of ore from 1000-foot level, Belmont vein.  Nye County, Nevada. 1915. Feldspar mill on Cathance River. Sagadahoc County, Maine. 1906. Quartz and Feldspar quarry. Bedford, Westchester County, New York. 1907. Exposure of crumpled schist of the Idaho Springs formation in Virginia Canyon, near Seaton Gulch; the lighter bands are injections of pegmatite. Clear Creek County, Colorado. Circa 1911. Feldspar mill on Cathance River. Sagadahoc County, Maine. 1906. Hornblende schist of Idaho Springs formation: intruded by pegmatite near Eldora. Boulder County, Colorado. Circa 1911. Quartz and Feldspar quarry. Bedford, Westchester County, New York. 1907. Radiating intergrowths of quartz (white) and ferruginous rhodochrosite (gray) with small patches of finely divided sulphides (black); photomicrograph (ordinary light) of this thin section of ore from 1000-foot level, Belmont vein.  Nye County, Nevada. 1915. Boulder strewn tidal flat, east shore of Lubec Neck. Washington County, Maine. 1913. Rock outcrops flanked by flats of glacio-marine gravels, northern part city of Eastport. Washington County, Maine. 1913. Hill northwest of Johnson cove, view looking east, showing the cliff-like profile of the south end of the hill. Washington County, Maine. 1913.