Report of the Geological Survey of Arkansas, Volume 5Press Printing Company, 1900 - Geology |
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15 feet 20 feet A. H. Purdue Alumina analysis Arkansas Batesville sandstone black shale bottom Branner breccia Buffalo River calamine Calciferous Carboniferous cavities cent Clair limestone contain crystals deposits Devonian dolomite dolomite spar Eureka Springs exposed face fault fauna feet deep feet long feet thick feet wide fossils fractures galena Geological Survey hill horizontal Ordovician iron Joe marble lime limestone Magnesia manganese metallic zinc miles mineral Morning Star Mountain Newton County North Arkansas north side northeast northwest quarter occurs open cut Ordovician Ordovician rocks ore-bearing bed outcrop PLATE Polk Bayou limestone Productus prospecting quartz quartzite Rush Creek saccharoidal sandstone Searcy County shaft shows Silurian smithsonite south side southeast quarter southwest species specimens sphalerite Spirifer SURVEY OF ARKANSAS synclinal tallow clay tunnel valley vein White River Worthen zinc blende zinc carbonate zinc mines zinc oxide zinc region zinc silicate zinc-bearing
Popular passages
Page 368 - A View of the Lead Mines of Missouri: Including Some Observations on the Mineralogy, Geology, Geography, Antiquities, Soil, Climate, Population, and Productions of Missouri and Arkansaw, and Other Sections of the Western Country.
Page 220 - ... the west half of the northeast quarter, and the northeast quarter of the northeast quarter of section...
Page 32 - ... importance in the determination of the present distribution of the ores. In an elevated region of approximately horizontal or very gently folded sediments, the waters falling upon the ground and soaking into the earth tend to seek the bottoms of the synclinal troughs. The process of ore accumulation in such a region would therefore tend to carry the ores into the synclines. The rocks of the zinc region, although not far from horizontal, are gently folded. Wherever folds have been exposed in the...
Page 241 - ... fully in several reports and papers, the principal ones of which are given herewith: The Ore Deposits of Southwestern Wisconsin, by TC Chamberlin, Geological Survey of Wisconsin, volume IV (18731879), 1882. Lead and Zinc, by Nrthur Winslow, Missouri Geological Survey, volume VII, 1892, pages 467-487. Lead and Zinc Deposits of the Mississippi Valley, by WP Jenney, Transactions of the American Institute of Mining Engineers, volume XXXII, 1894.
Page 248 - Purdue from Madison County. Aurichalcite, (carbonate of zinc and copper: carbon dioxide, 16.1; zinc oxide, 53.2; cupric oxide, 20.8; water, 9.9 per cent.). Pale green, pearly translucent botryoidal masses usually about the size of a small pea or lining cavities. Common at many of the zinc mines, but always in small quantities ; it is especially abundant at the Mud Hollow mines on Tomahawk Creek, Searcy County. Wherever the zinc blende crystals are being altered by weathering, especially where the...
Page 15 - ... of the deposits based upon such conditions is equally consistent with any of the common theories of ore derivation. The same, it would seem, can be said concerning the observed paragenesis of the minerals and the growth of crystals, in which Dr. Jenney sees additional foundation for his conclusions. If we accept the broader idea of lateral secretion, which does not demand that a mineral shall be derived from the very rock to which it is attached, but recognizes abundant flow along crevices and...
Page 23 - The question of the origin of the breccia ores "has been one of the most puzzling problems encountered in the zinc regions. The only theory for these formations that seems tenable is that of the apparently irregular masses of breccia, that is, the breccias not upon fault and such like fractures, have been formed along ancient underground water- courses.
Page 313 - Genesee formation. The fauna in these fine shales in Arkansas, terminating and following the black shales, is unmistakably much higher than the Genesee black shale of New York. Faunally, it is the correlative of the Louisiana or lithographic limestone, and is thus as late as the Kinderhook stage of the Eocarboniferous. There can be no doubt regarding the Carboniferous age of the faunas of the typical Louisiana limestone. Its fauna is characteristically...
Page 263 - ... in North Arkansas is derived from chert or flint by the process of weathering. There is a great abundance of this material in the zinc region, but whether or not it has any commercial value is a matter that can be determined only by experiment. It is extensively used for manufacturing polishing powders and water filters. The following analysis was made of the "tripoli" from Seneca, Missouri : Analysis of "tripoli.
Page 369 - On a New Locality of Tetrahedrite, Tennantite and Nacrite ; with some account of the Kellogg Mines of Arkansas. American Journal of Science, 1867, Second Series, Vol.