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Filters: Tags: Boulder County, Colorado (X)

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Album caption and index card: Looking east at barren part of the main Clyde vein at the east end of the stope on the tunnel level. Boulder County, Colorado. Notes: Published as figure LVIII-F in U.S.Geological Survey. Professional Paper 223. 1950.
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Looking up Millionaire Gulch, south in Section 29, T.1 N.R. 71 W. The Katie Ferberite Mine is on the right. The Dorothy mine of the Tungsten Metals Corporation is at the head of the gulch. Boulder County, Colorado. March 5, 1917.
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The Snowy Range from Gold Hill. Long's Peak is on the right, about 50 miles away. This lake has an elevation of 12,000 feet, and the average height of the range is some 2,000 feet above it. Boulder County, Colorado. 1873.
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Form a panorama with photo 673. Open cut on the "Copeland property" of the Primos Exploration Company, South Boulder Creek, 1 1/2 miles north of Crescent station on the Moffat Road and 10 miles southwest of Boulder looking north. Boulder County, Colorado. March 6, 1917.
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Album caption and index card: Photomicrograph of rhyolite porphyry of group 7 from dike 1 mile north of Argentine Pass. The phenocrysts have borders of fine-grained oriented quartz in the groundmass. o, sericitized orthoclase; q, quartz. Crossed nicols. Boulder County, Colorado. Notes: Published as figure XIII-C in U.S.Geological Survey. Professional Paper 223. 1950.
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Album caption and index card: Photomicrograph of Boulder Creek granite from ridge half a mile east of junction of Middle Boulder and North Boulder Creeks. Primary gneissic structure indicated by quartz- oligoclase contact and by biotite is nearly horizontal in photograph. Slight secondary shearing shown by undulatory extinction of quartz in upper right. b, biotite; o, oligoclase; q, quartz. Polarized light. Boulder County, Colorado. Notes: Published as figure X-C in U.S.Geological Survey Professional paper 223. 1950.
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Pile of 30 to 35 tons of fluorspar from Blue Jay vein on property of Pitchblende Company. T. S. Lovering in view. Jamestown, Boulder County, Colorado. July 16, 1926.
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Jamestown, Colorado. View westward of Bueno Mountain from top of porphyry dike above Terry mine. Boulder County, Colorado. November 5, 1927.
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Album caption and index card: Photomicrograph of quartz-biotite schist from Idaho Springs formation at Nederland. Original bedding (nearly vertical in photograph) is intersected by shear planes sloping down to right at about 45°, and these shears are cut by later shears sloping to left at 60°. b, biotite; g, garnet; m, magnetite; q, quartz; fgb, crushed feldspar, quartz and biotite. Polarized light. Boulder County, Colorado. Notes: Published as figure IVV-D in U.S.Geological Survey. Professional Paper 223. 1950.
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Idealite plant and clay mine on Rocky Flats, Coal Creek in foreground, 2,100 feet W., 250 feet N., SE cor.sec. 32, T. 1 S., R. 70 W. Overburden dumped close to Coal Creek. Louisville quadrangle, Boulder County, Colorado. February 19, 1972.
map background search result map search result map Caribou. Boulder County, Colorado. No date. The Snowy Range from Gold Hill. Long's Peak is on the right, about 50 miles away. Boulder County, Colorado. 1873. Long's Peak from Estes Park. Rocky Mountain National Park. Boulder and Larimer Counties, Colorado. 1873. Long's Peak from southeastern base, head of the Saint Vrain. Boulder County, Colorado. 1873. View in Boulder Canyon, near Castle Rock. Boulder County, Colorado. 1873. A barren portion of the Tungsten vein in the Tungsten (Chance) mine. Boulder County, Colorado. 1930. Photomicrograph of quartz-biotite schist from Idaho Springs formation at Nederland. Boulder County, Colorado. circa 1932. Photomicrograph of Boulder Creek granite from east of junction of Middle Boulder and North Boulder Creek. Boulder County, Colorado. circa 1932. Photomicrograph of rhyolite porphyry. Boulder County, Colorado. circa 1932. Looking east at barren part of the main Clyde vein at the east end of the stope on the tunnel level. Boulder County, Colorado. circa 1932. The Snowy Range, looking north from Gold Hill. Boulder County, Colorado. n.d. Caribou. Boulder County, Colorado. No date. The Snowy Range from Gold Hill. Long's Peak is on the right, about 50 miles away. Boulder County, Colorado. 1873. Long's Peak from southeastern base, head of the Saint Vrain. Boulder County, Colorado. 1873. View in Boulder Canyon, near Castle Rock. Boulder County, Colorado. 1873. A barren portion of the Tungsten vein in the Tungsten (Chance) mine. Boulder County, Colorado. 1930. The Snowy Range, looking north from Gold Hill. Boulder County, Colorado. n.d. Long's Peak from Estes Park. Rocky Mountain National Park. Boulder and Larimer Counties, Colorado. 1873. Photomicrograph of quartz-biotite schist from Idaho Springs formation at Nederland. Boulder County, Colorado. circa 1932. Photomicrograph of Boulder Creek granite from east of junction of Middle Boulder and North Boulder Creek. Boulder County, Colorado. circa 1932. Photomicrograph of rhyolite porphyry. Boulder County, Colorado. circa 1932. Looking east at barren part of the main Clyde vein at the east end of the stope on the tunnel level. Boulder County, Colorado. circa 1932.