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Album caption and Index card: Diamonds from the Arkansas mine, near Murfreesboro. These diamonds are in the Col. Washington A. Roebling collection in the National Museum. Their weights in carats are as follows (top to bottom, left to right): No. 1, 11.21 carats; No. 2, 6. 83 carats; No. 3, 3.30 carats; No. 4, 2.77 carats; No. 5, 17.86 carats; No. 6, 4.40 carats; No. 7, 1.19 carats; No. 8, 0.91 carats; No. 9, 2.50 carats, and No. 10, 1.40 carats. Pike County, Arkansas. n.d. (Specimens) Published as Plate 15-A in U.S. Geological Survey Bulletin 735. 1923. Published as Plate 17-A in U.S. Geological Survey Bulletin 808. 1929.
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Altered volcanic breccia ("blue ground") in cut of Ozark mine, near Murfreesboro, Pike County, Arkansas. 1912. Plate 11-A in U.S. Geological Survey. Bulletin 735. 1923.
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Exposures of the hypabyssal, intrusive peridotite ("Hardebank") in the northern part of Mauney mine, near Murfreesboro, Pike County, Arkansas. 1912. Plate 10-A in U.S. Geological Survey. Bulletin 735. 1923.
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Album caption and Index card: Arkansas diamond mine 2 1/2 miles south-southeast of Murfreesboro, looking north. A dragline scraper has been used to mine diamond-bearing material. Caddo Gap quadrangle, Pike County, Arkansas. October 1923. Published as Plate 19-B in U.S. Geological Survey Professional Paper 154-F. 1929.
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Gypsum bed at Plaster Bluff on the Little Missouri River, 3 miles south of Murfreesboro. Outcrop of the Trinity formation. Pike County, Arkansas. ca. 1901. Plate 5-A in U.S. Geological Survey. Professional Paper 46. 1906.
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Ozark mine and washing plant, looking northeast, the Cut is largely in "blue ground" and "yellow ground" that have derived from volcanic breccia; taken in 1916, since destroyed by fire. Near Murfreesboro, Pike County, Arkansas. 1912. Published as Plate 11-B in U.S. Geological Survey. Bulletin 735. 1923.
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Album caption and Index card: Hydraulic mining at Arkansas mine. Caddo Gap quadrangle, Pike County, Arkansas. October 1923. Handwritten notes on album caption: Caddo Gap quad., Pike County. Published as plate 19-A in USGS Professionap Paper 154-F. 1929. Published as plate 18-A in USGS Bulletin 808. 1929.


    map background search result map search result map Ozark mine and washing plant, looking northeast. Pike County, Arkansas. 1912. Dragline scraper used at Arkansas diamond mine, near Murfreesboro. Pike County, Arkansas. 1923. Diamonds being mined by hydraulicking. Pike County, Arkansas. 1923. Diamonds from the Arkansas mine. Pike County, Arkansas. No date. Gypsum bed at Plaster Bluff. Pike County, Arkansas. ca. 1901. WMR 276 - Mercury Deposits. Pike County, Arkansas. 1944. Ozark mine and washing plant, looking northeast. Pike County, Arkansas. 1912. Dragline scraper used at Arkansas diamond mine, near Murfreesboro. Pike County, Arkansas. 1923. Diamonds being mined by hydraulicking. Pike County, Arkansas. 1923. Diamonds from the Arkansas mine. Pike County, Arkansas. No date. Gypsum bed at Plaster Bluff. Pike County, Arkansas. ca. 1901. WMR 276 - Mercury Deposits. Pike County, Arkansas. 1944.