Showing 221 - 240 results of 586 for search '"quartzite"', query time: 0.12s Refine Results
  1. 221

    Additional observations on the Late Proterozoic Varangerfjorden unconformity, Finnmark, northern Norway by K. Laajoki

    Published 2001-12-01
    “…Pleistocene striations and pits on the Veinesbotn quartzite are described for comparison purposes.…”
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  2. 222

    THE LOWER PALEOLITHIC INDUSTRY OF ANKHE IN VIETNAM WITH THE SO-CALLED MOVIUS LINE by Nguyễn Khắc Sử

    Published 2019-09-01
    “…The An Khe industry is characterized by a collection of stone tools made of local river and stream quartz, quartzite pebbles which are large, hard, and fine grained. …”
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  3. 223

    Les marbres, données géologiques et questions de restaurations by Annie Blanc

    Published 2013-01-01
    “…To distinguish them from each other, chemical analysis is necessary (trace elements, carbon and oxygen isotopes).Masons worked different limestone rocks, which they polished and used decoratively, including limestone marble, nodular limestone, Griotte, Breccia, conglomerates and siliceous rocks like porphyry, serpentine, quartzite, etc. Study and description of these and other calcareous rocks allows, in most cases, the identification of their origin.As part of the restoration, it was necessary to identify the marble and ornamental rocks, to find out whether they were still quarried, and if not, to make replacements, particularly for the floors. …”
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  4. 224

    Numerical modeling of post-collisional carbonated alkaline magmatism: Variscan style Orogeny (the Ivrea Zone as natural laboratory) by Christopher M. Gonzalez, Marco L. Fiorentini, Weronika Gorczyk, Greg Dering

    Published 2020-09-01
    “…Scenario 1: the wet quartzite 40 Ma model features widespread H2O and CO2 fluxes within the continental lithospheric mantle. …”
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  5. 225

    The alkali–aggregate reaction for various aggregates used in concrete by J. Gadea, J. Soriano, A. Martín, P. L. Campos, A. Rodríguez, C. Junco, I. Adán, V. Calderón

    Published 2010-09-01
    “…The potential reactivity of different silicaceous aggregates (slates, gneiss, hornfels, granites, quartzite and serpentine) is then determined by a chemical method for evaluating the potential reactivity of aggregates and an accelerated method in mortar specimens, and finally the surface reactivity is investigated. …”
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  6. 226

    Characterization of the Obsidian Used in the Chipped Stone Industry in Kendale Hecala by Üftade Muşkara, Ayşin Konak

    Published 2022-01-01
    “…Various raw materials, including obsidian, radiolarite, chert, jasper, chalcedony, and quartzite, were used in the lithic industry. Obsidian artefacts constitute an average of 64% of the chipped stone assemblage. …”
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  7. 227

    Geological and geophysical evaluation of the Ajana area’s groundwater potential, southwestern Nigeria by O.M Ajibade, Adetayo F Folorunso, Stephen O Ariyo

    Published 2011-06-01
    “…Geological mapping revealed that the area was made up of granite, quartzite and varieties of gneiss, some of which have good secondary porosity and permeability. …”
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  8. 228

    NATURE SIMILAR TECHNOLOGIES IN CONSTRUCTION INDUSTRY by Valery S. Lesovik, Lilia Kh. Zagorodnyuk, Evgeny S. Glagolev, Roman S. Feduk

    Published 2018-12-01
    “…The article proposes the technology of using water-resistant and cold-resistant quick-hardening composite on the basis of gypsum binders of a new generation with finely ground mineral additives of different genetic types, in-cluding using a new unique type of mineral additives - waste from the magnetic separation of ferruginous quartzite. бионика, геоника (геомиметика), 3D-технологии, аддитивные технологии, композиционные гипсовые вяжущие, минеральная добавка, строительные композиты…”
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  9. 229

    Fluidized Bed Gasification of Biomass and Biomass/Coal Pellets in Oxygen and Steam Atmosphere by G. Ruoppolo, F. Miccio, P. Brachi, A. Picarelli, R. Chirone

    Published 2013-06-01
    “…Two different bed materials were adopted: inert quartzite and Ni-alumina catalyst. The gasification tests were carried out at steady state, under operating conditions typical for gasification paper. …”
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  10. 230

    Perspective of gold-bearing deposits in the ferruginous-siliceous formations of Egypt and Kursk Magnetic Anomaly by Hani E. Sharafeldin, Alexander A. Vercheba

    Published 2019-12-01
    “…Gold mineralization is spatially associated with banded ferruginous quartzite, representing one of the most ancient manifestations of gold ore. …”
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  11. 231

    Well log responses in metamorphic rocks near Maribor

    Published 1995-12-01
    “…Two fields of well log responses are distinguishable, as separated by the degree of natural radioactivity. Apart from veined quartzite, all rocks fromthe phyllitic part of the metamorphic complex are highly radioactive. …”
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  12. 232

    Development of carbon ferrochrome smelting technology using high-ash coal by Ye. Kuatbay, A. Nurumgaliyev, T. Zhuniskaliyev, S. Smailov, A. Yerzhanov, G. Bulekova

    Published 2022-01-01
    “…The optimal percentage of replacing traditional coke with coal up to 30% (by weight) has been found, which can significantly reduce the specific consumption of quartzite in the charge.…”
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  13. 233

    Impulse wave in the Brazilian Lake of Capitólio by Geraldo de Freitas Maciel, João Batista Pereira, Yuri Taglieri Sáo, Fabiana de Oliveira Ferreira, Laine Garcia Ferreira

    Published 2023-12-01
    “…ABSTRACT This note proposes a technical approach towards the disaster occurred on January 8, 2022, in the tourism region of Capitólio (Minas Gerais state, Brazil), where a massive quartzite rock broke from a cliff and toppled on to pleasure boaters drifting on a lake, leaving 10 people dead and 30 others injured. …”
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  14. 234

    Scotland–Finland Precambrian correlations by D.R. Bowes

    Published 1975-12-01
    “…Inverian episode and the c. 2 300 m.y. episode in Finland, (3) the c. 2.1 b.y. deposition of the Loch Maree Group in Scotland and the Jatulian quartzite, Karelian schists and related geosynclinal deposits in Finland, and (4) the c. 1 975—1 700 m.y. …”
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  15. 235

    Magma contamination, petrogenesis features and distribution of ore element in the rocks of nickeliferous formation in the Sredinny-Kamchatka massif by O.B. Selyangin, O.B. Selyangin

    Published 2018-12-01
    “…This is the final article that describes various for petro- and oreogenesis consequences of the contamination of nickel-bearing magma with siliceous material (quartzites), which led to the replacement of ultrabasic ore-hosting rocks (cortlandites) with ultramafic (amphibole orthopyroxenites). …”
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  16. 236

    TRIASSIC STRATIGRAPHY AND SEDIMENTARY EVOLUTION OF THE ANNAPURNA TETHYS HIMALAYA (MANANG AREA, CENTRAL NEPAL) by EDUARDO GARZANTI, ALDA NICORA, ANDREA TINTORI

    Published 2017-06-01
    “…The Triassic succession is capped by subarkoses and quartzarenites, interbedded with dolomitic to bioclastic hybrid sandstones and silty limestones ("Quartzite Series"), in turn overlain by the Kioto Limestone.…”
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  17. 237

    Interaction of ecology, taxonomy and distribution in some Mesembryanthemaceae by H. E. K. Hartmann

    Published 1983-11-01
    “…Many taxa of the family Mesembryanthemaceae show close correlations between distribution and environmental factors, e.g. occurrence on limestone or quartzite only, but few cases have been studied in detail. …”
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  18. 238

    Raw material sourcing in the Middle Paleolithic site of Gruta da Oliveira (Central Limestone Massif, Estremadura, Portugal) by Henrique Matias

    Published 2016-09-01
    “…The study of the lithic assemblage from layer 14 (dated to the ~61-93 ka 95.4% probability interval by TL) indicates that the Gruta da Oliveira Neanderthals used quartzite, quartz and flint from sources located less than 30 km away in both the CLM and the TSB.…”
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  19. 239

    Classification of cut slopes in weathered meta-sedimentary bedrocks by Nkpadobi, J.I., Raj, J.K., Ng, T.F.

    Published 2016
    “…In order of abundance, the meta-sedimentary rocks along Pos Selim Highway in Perak state Malaysia comprise quartz mica schist, graphitic schist and quartzite layers. Field investigations revealed that these meta-sedimentary rocks have gradational weathering profile based on differences particularly in textures, hardness, lateral changes in colour, and consistency of material extension. …”
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  20. 240

    The Paleoproterozoic Evolution of Basement Rocks of the Taebaeksan Basin, Korean Peninsula, and Their Correlation to Those of the Paleoproterozoic Massifs in the Korean Peninsula by Bo Young Lee, Deung-Lyong Cho, Chang Whan Oh, Byung Choon Lee, Seung Hwan Lee

    Published 2023-05-01
    “…The detrital zircons in the Jangsan quartzite show ages ranging from 3.06 to 1.85 Ga, with a peak concentration of ca. 2.5 Ga. …”
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