Bulletin, Issue 734U.S. Government Printing Office, 1922 - Geology |
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20 feet Arkansas barite Batesville district Boone chert boulders braunite buttons calcite Carboniferous carload Cason shale Cave Creek cent of manganese Chattanooga shale chert débris Clair limestone consists crest Cushman deposits Devonian East Lafferty Creek exposures feet deep feet thick Fernvale limestone ferruginous manganese formation fossils fragments and pebbles ganese gray hausmannite hill slope hollow inches Iron Fe iron oxide irregular masses Joachim limestone Kimmswick limestone ledges locality lump Manganese Mn manganese oxide manganese-bearing clay masses of manganese miles north miles northeast mined and shipped occurs openings operated Ordovician ore-bearing clay outcrops overlain particles Penrose Penters Bluff station Peter sandstone Pfeiffer phosphate Phosphorus pits and cuts places Plattin limestone Polk Bayou prospect psilomelane residual clays ridge rock sand shafts shallow pits Silica SiO2 Silurian stone surface surficial syncline tons of manganese tract UNCONFORMITY W. H. Denison washing plant
Popular passages
Page 59 - Penrose, RAF, jr., Manganese, its uses, ores, and deposits: Arkansas Geol. Survey Ann. Rept. for 1890, vol. 1, 1893. Joslin, GA, Manganese in west-central Arkansas: Min. and Sci. Press, vol. 113, pp. 947-948, 1916. Miser, HD, Manganese deposits of the Caddo Gap and De Queen quadrangles, Ark.: US Geol.
Page 65 - In some places, though rarely, it is evenly distributed throughout a large body of clay ; but in most places it is in numerous pockets surrounded by clay containing no ore. These pockets vary greatly in character: Sometimes they are comparatively solid bodies, separated only by thin films or seams of clay and containing from 50 to 500 tons or more of ore : sometimes they consist of large and small masses of ore embedded together in greater or less quantities in certain places in the clay; at other...
Page 59 - RAF, jr., op. cit., pp. 167-168. oxides in bodies of different sizes. It is very probable that the manganese originally existed in the limestone in the form of a carbonate and was subsequently oxidized into its present condition. Possibly this oxidation may be only superficial, and below the water level of the country the ore may still retain its carbonate form.
Page 5 - Harder, EC— Manganese deposits of the United States, with sections on foreign deposits, chemistry, and uses: US Geol.
Page 53 - Wad. — Wad is a dark-brown to black, very soft earthy mineral which is commonly considered an impure hydrous oxide of manganese. It is associated with more or less iron, silica, alumina, and water. It is present at many localities in the Batesville district, and at some of them is more abundant than the higher-grade manganese minerals.
Page 66 - ... accompanying ore have a distinct dip, pitching away from such protuberances on all sides. This feature is a natural consequence of the sinking of a soft, plastic clay on an uneven surface, and a knowledge of It will prove of value in the practical mining of the ore. When a body of ore Is found in the clay at or near the surface of one of these limestone peaks, its dip will be found to conform more or less closely to the angle of slope of the surface of the limestone. The manganese ores consist...
Page 40 - It consists of a brown or buff colored, fine grained sandstone, generally soft, though sometimes hard. It splits easily along the lines of bedding, in slabs varying from a few inches to three or four feet in thickness, and is extensively worked for structural purposes at Bartlett's quarry, in Batesville. The shales in the sandstone occur as lenticular deposits, often ending very abruptly, though sometimes traceable for several miles. They and the sandstones appear, in many places, to be mutually...
Page 80 - Hewett, DF, Stose, GW, Katz, FJ, and Miser, HD, Possibilities for manganese ore on certain undeveloped tracts in the Shenandoah Valley, Va.
Page 34 - DUNBAR, CO, Stratigraphy and correlation of the Devonian of western Tennessee: Tennessee Geol. Survey, Bull. 21, 1919. HALL, JAMES, Descriptions and figures of the organic remains of the lower Helderberg group and the Oriskany sandstone: Geol. Survey New York, Paleont., vol. 3, pt. 2 (plates), 1861. KING, PB, Geology of the Marathon region, Texas: US Geol. Survey Prof. Paper 187, pp. 47-55, 1937. PLUMMER, FB, and GRANT...
Page 67 - Penrose,18 they have in places " been disintegrated into a more or less sandy clay and mixed with the other residue from the limestone ; in other places they have not as yet been entirely decomposed and are associated with the clay as soft, earthy, honeycombed, and partly disintegrated masses commonly known as