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Упит dcterms_subject_txt:open-cast coal mine

565 items

  • Understanding partitioning of deformation in highly arcuate orogenic systems: Inferences from the evolution of the Serbian Carpathians

    Nemanja Krstekanić, Liviu Matenco, Marinko Toljić, Oleg Mandić, Uroš Stojadinović, Ernst Willingshofer (2020)
    orogeneza, oroklini, višesmerna ekstenzija, transkurentna kretanja, Srpski Karpati
    ... these rocks are overlain by a transgressive-regressive upper Carboniferous–Permian sequence containing conglomerates, sandstones and shales with coal seams that are replaced upwards in the stratigraphy by red alluvial sandstones (Fig. 3, Djordjević-Milutinović, 2010; Kalenić et al., 1980; Petković ...
    ... landscape view of the Upper Getic thrust. Note the low angle geometry of the thrust with footwall represented by early Miocene sedimentary sequence of the coal-bearing Senje–Resava Basin. Inset illustrates simplified geological map of the area shown in the photo (modified after Basic geological map of former ...
    ... Methoden und Ergebnisse. Gustav Fischer Verlag, Jena, Stuttgart, New York. Maksimović, B.B., 1956. Geological and tectonical relations of the coal bearing formations of the Senjsko–Resavski mines and the surrounding area. In: Special editions of the Geological institute, 6, pp. 1–104. "Jovan ...

  • Polyhedral characteristics of the cosalite-type crystal structures

    Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus (2019)
    kristalna struktura, kozalit, poliedarske karakteristike

  • Insights into dike nucleation and eruption dynamics from high-resolution seismic imaging of magmatic system at the East Pacific Rise

    Milena Marjanović, Suzanne M. Carbotte, Alexandre Stopin, Satish C. Singh, René-Édouard Plessix, Miloš Marjanović, Mladen R. Nedimović, Juan Pablo Canales, Hélène D. Carton, John C. Mutter, Javier Escartín (2023)
    Multidisciplinary

  • Процена ризика од удеса на флотацијском јаловишту "Ваља Фундата

    Милица Илиевски (2024)
    У овом завршном раду под називом: „Процена ризика од удеса на флоатацијском јаловишту „Ваља Фундата““ кроз 8 поглавља описане су примењене методе за управљање флотацијском јаловином, као и могући сценарији удеса који могу настати услед нестабилности брана или природних катастрофа.Рад користи технике попут FMEA и ALARP за анализу ризика, при чему се ризик дефинише као функција вероватноће и последица инцидента.Препоручене су мере за смањење ризика и унапређење стабилности брана,укључујући редовно одржавање и надградњу инфраструктуре.Резултати рада указују да је ризик ...
    флотацијска јаловина, процена ризика, рушење бране, удеси, еколошке последице
    ... pywetbe OpaHe, yOecu, eKOJIOMMAKC nocnedm,;e. Abstract The flotation tailings facility "Valja Fundata" is the main tailings site for the copper mine in Majdanpek, operating since 1961. covering an area of about 360 hectares, it is one of the largest tailings sites in Europe. This final paper ...
    ... на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs VYVununepaurer y beorpany PynapckKo-reomotmiKu ...

  • The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector

    Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković (2020)
    Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...
    energetska bezbednost, prirodni gas, fazi AHP, AHP višekriterijumska analiza, fazi teorija
    ... Jankovic, I.; Subaranovic, T. Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine. Energies 2019, 12, 4044. [CrossRef] 66. Wang, J.J.; Jing, Y.Y.; Zhang, C.F.; Zhao, J.H. Review on multi-criteria decision analysis aid in ...
    ... and the given combination c, where: jc = 1, ..., n; 5. For each outcome, a minimum value of µP1,P2,P3 in the vector Mc (4) is required, as follows: MINo =min{µP1(j)o, µP2(j)o, µP3(j)o}, (15) for every o = 1 дo O. 6. The outcomes are grouped according to the knowledge of Jc. The number of such groups ...
    ... на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs symmetryS S Article The Fuzzy–AHP Synthesis ...

  • Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention

    Milica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović (2023)
    Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...
    Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol Injection

  • Arsenopirit iz rudnih ležišta Šumadijsko-kopaoničke oblasti: paregeneza, sastav i produkti oksidacije

    Ivana N. Jelić (2023)
    Arsenopirit, FeAsS je čest pratilac polimetaličnih orudnjenja Šumadijsko-kopaoničke oblasti. Jedan je od sulfida koji u najvećoj meri koncentriše zlato. Nepoželjan je u rudama jer njegovom oksidacijom na jalovištima može doći do oslobađanja arsena koji spada u elemente toksične za životnu sredinu. U okviru ovog doktorata sistematski su ispitivani arsenopiriti iz različitih stadijuma i tipova orudnjenja rudnih ležišta i mineralizacija Šumadijsko-kopaoničke oblasti (Rudnik, Sastavci, Trepča, Gokčanica – Drenjak i Rujak, Golijska reka i Jurija). Uzorci arsenopirita ispitivani su polarizacionom mikroskopijom ...
    arsenopirit, zlato, skorodit, Šumadijsko-kopaonička oblast, parageneza, zonarnost
    ... arsenic and lead solubility in an abandoned gold mine tailings. Science of The Total Environment 263, 209-219. Salzsaueler, K. A., Sidenko, N. V., Sherriff, B. L. (2005): Arsenic mobility in alteration products of sulfide-rich arsenopyrite-bearing: mine wastes, Snow Lake, Manitoba, Canada. Applied ...
    ... Pellitero, E.., Rodriguez, M.A., Sanchez, A.G., Tamayo, A., Rubio, J., Rubio, F., Rubin, J. (2011): Study of arsenopyrite weathering products in mine wastes from abandoned tungsten and tin exploitations. Journal of Hazardous Materials, 186, 590—601. Murphy, T. D. (2015): Bismuth in the supergene ...
    ... на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs UNIVERZITET U BEOGRADU RUDARSKO-GEOLOŠKI ...

  • Using Lexical Resources for Irony and Sarcasm Classification

    Miljana Mladenović, Cvetana Krstev, Jelena Mitrović, Ranka Stanković (2017)
    The paper presents a language dependent model for classification of statements into ironic and non-ironic. The model uses various language resources: morphological dictionaries, sentiment lexicon, lexicon of markers and a WordNet based ontology. This approach uses various features: antonymous pairs obtained using the reasoning rules over the Serbian WordNet ontology (R), antonymous pairs in which one member has positive sentiment polarity (PPR), polarity of positive sentiment words (PSP), ordered sequence of sentiment tags (OSA), Part-of-Speech tags of words (POS) ...
    ... neće biti uglja, gasa, struje i ogreva jer sa ovim smanjenjem ne bi ni moglo da se plati! (sreća - žalost) ‘Fortunately this winter there will be no coal, gas, electricity or fuel, because with this pay cut it would be impossible to pay!’ (Fortunately – Unfortunately) By selecting a proper set of features ...
    ... 185, be_in_state 288, hyponym 20,709. 9We used the following software tools in this paper: Developing tool Eclipse Java EE IDE Luna and Apache Jena open source software development environment which allows for reasoning at the level of OWL 2 language by converting OWL rules into the Jena rules format ...

  • Hydrochemical changes and groundwater grouping data by multivariate statistical methods within one karst system: recharge–discharge zone (Eastern Serbia case study)

    Ljiljana Vasić, Dragana Živojinović, Vladana Rajaković-Ognjanović (2020)
    Geochemistry and Petrology

  • Production of morphological dictionaries of multi-word units using a multipurpose tool

    Ranka Stanković, Ivan Obradović, Cvetana Krstev, Duško Vitas (2011)
    The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...
    electronic dictionary, Serbian, morphology, inflection, multi-word units, noun phrases, query expansion
    ... MWU representing a proper name are not words in Serbian, as in Bab-el-Mandeb, or because some words are used only in MWUs (like nagazna in nagazna mina ‘landmine’). In both cases there was no justification for including such words in dictionaries of simple words. In a much smaller number of Fig. ...
    ... на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Production of morphological dictionaries of ...
    ... forms, and getSinonimiWN NoFlex(lema) which re- turns synonyms without inflected forms. As our e-dictionaries are Unitex-based, and Unitex is an open source software distributed under the LGPL license, we incorporated its modules in LeXimir for the majority of tasks that involve manipulation of ...

  • Појава НИМБИ синдрома међу становништвом Лознице и околине услед планираних рударских активности

    Сара Арсенић (2024)
    Рад обрађује историјски развој нимбизма, његову анализу, природе и димензије, и његово превазилажење. Анализа се фокусира на планиране рударске активности у околини Лознице и њихов утицај на ставове локалног као и околног становништва и стручне јавности укључујући резултате испитивања јавног мњења кроз анкету. Анкета садржи тринаест питања и рађена је за три групе: становници Београда и околине, Лозница и оклоина и стручна јавност. Такође се и разматра како се различити политички и еколошки фактори манифестују у овом контексту, као ...
    нимби синдром, пројекат „Јадар“, отварање рудника, анкетирање јавног мњења
    ... possibilities for overcoming nimbyism through public engagement and compensation for the population. Key words: nimby syndrome, "Jadar" project, mine opening, public opinion poll. Cnucak cyiuKa Cka 1: IIpBa crpaHa aHKeTE lyy aaaaaa a eaaaaaaaaaaaaaaaaoatttt 20 Cuka 2: Jipyra crpaHa aHKeTe.aaaaa ...
    ... на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Yuunepaurer y Beorpany Pynapcko-reo:notmiku ...

  • Hidrodinamička analiza procesa starenja bunara sa horzontalnim drenovima na beogradskom izvorištu podzemnih voda

    Đorđije M. Božović (2023)
    Predmet istraživanja doktorske disertacije su bunari sa horizontalnim drenovima beogradskog izvorišta podzemnih voda, drugog najvećeg izvorišta ovog tipa na svetu, čiji je režim rada opterećen procesima intenzivnog starenja prisutnog od samog početka formiranja izvorišta, početkom 1950‒ih godina. Istraživanja sprovedena u okviru izrade disertacije su imala za cilj definisanje nove metodologije izučavanja procesa mehaničkog i biohemijskog kolmiranja drenova izradom detaljnih 3D numeričkih hidrodinamičkih modela, upotrebom postojećih, dostupnih i široko rasprostranjenih računarskih programa. Istraživanja su realizovana simulacijom ostvarenog režima podzemnih voda ...
    modeliranje podzemnih voda, hidrauličke karakteristike drenova, koeficijent propusnosti drenova, prifilterska zona drena, hidraulički otpori na drenovima, kolmiranje drenova, ulazne brzine podzemnih voda, MODFLOW, CLN Package
    ... praksa, primeri proračuna. Balby International, Beograd. 7 Bajić, D., Polomčić, D., 2012. A conceptual hydrogeological model for open pit mine „Polje E“ (Kolubara coal basin, Serbia). Conference: GIS Ostrava 2012 – Surface models for geosciences symposium, Ostrava, Czech Republic. 8 Bakker, M., ...
    ... 3-1 212 Weidner C., Houben, G.J., Halisch, M., Kaufhold, S., 2016. Wellbore skin in mine dewatering and drinking water supply: field observation, mineralogy and hydraulic effect. Conference: International mine water association 2016 At: Leipzig, Germany, Volume: Mining Meets Water – Conflicts and ...

  • Geološke karakteristike neogenih sedimenta na prostoru šire okoline Ledinaca

    Aleksandar Tričković (2024)
    Sagledavanje evolucije neogenih sedimenata na prostoru šire okoline sela Ledinci omogućeno je primenom različitih stratigrafskih metoda na površinskim i potpovršinskim podacima. Za izradu rada korišćene su sedimentološke, biostratigrafske, geofizičke i riftno sekvencione metode, koje su primenjene na površinskim izdancima i bušotinama. Primenom principa riftne sekvencione stratigrafije na podacima dobijenim geofizičkim karotažnim merenjima dobijeni su podaci o vremenu ekstenzije u Panonskom basenu. Pored toga ovi podaci zajedno sa sedimentološkim i stratigrafskim metodama omogućili su izdvajanje depozicionih sredina tokom neogena. Generalno ...
    depozicioni sistemi, neogen, Panonski basen, ekstenzija, formacije, riftna sekvenciona stratigrafija
    ... vol. 84, str. 133-145. 35 Rundić, LJ., Knežević, S., Rakijaš, M., 2013. Middle Miocene Badenian transgression: new evidences from the Vrdnik Coal Basin (Fruška Gora Mt., northern Serbia), Geološki anali Balkanskog poluostrva, vol. 74, str. 9-23. Rundić, LJ., Vasić, N., Životić, D., Bechtel ...
    ... на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Univerzitet u Beogradu Rudarsko-geološki ...

  • Modeliranje tehnoloških procesa u rudarstvu u uslovima nedovoljnosti podataka primenom teorije grubih skupova

    Zoran M. Štirbanović (2015-07-01)
    Rudarstvo, a u okviru njega i priprema mineralnih sirovina, se odlikuje složenošću tehnoloških procesa što je posledica velikog broja uticajnih parametara. Samim tim je potrebno biti veoma obazriv prilikom donošenja odluka u oblasti rudarstva. U cilju što efikasnijeg funkcionisanja procesa, moguće je primeniti različite metode koje služe za pojednostavljenje procesa odlučivanja. Jedna od takvih metoda jeste i teorija grubih skupova. Ona predstavlja relativno novu matematičku teoriju koja je pogodna za razumevanje nepreciznih i nepotpunih podataka kao i za otkrivanje ...
    rudarstvo, priprema mineralnih sirovina, teorija grubih skupova, višekriterijumsko odlučivanje, flotacijsko jalovište, flotacijski kolektor, flotaciona mašina
    ... Innovations, Economics & Business, Vol. 7, No. 1, 2011, pp. 80-83. 77. M. Benvenuti, I. Mascaro, F. Corsini, P. Lattanzi, P. Parrini, G. Tanelli, Mine waste dumps and heavy metal pollution in abandoned mining district of Boccheggiano (Southern Tuscany, Italy), Environmental Geology 30 (3/4), 1997 ...
    ... screening, Physics and Chemistry of the Earth, Vol.27, 2002, pp. 1371–1376. 82. N. Eriksson, P. Adamek, The tailings pond failure at the Aznalcóllar mine, Spain, Environmental Issues and Management of Waste in Energy and Mineral Production, Book, Netherlands, 2000, pp. 109-116. 83. E. E. Alonso ...
    ... на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs UNIVERZITET U BEOGRADU RUDARSKO – GEOLOŠKI ...

  • An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)

    N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero (2020)
    Paleontology,Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics,Oceanography

  • Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija

    Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić (2016)
    flotacijska jalovišta, životna sredina, višekriterijumska analiza, ekologija, Trepča
    ... The authors declare no conflict of interest. References 1. Ristović, I.; Stojaković, M.; Vulić, M. Recultivation and Sustainable Development of Coal Mining in Kolubara Basin. Therm. Sci. 2010, 14, 759–772. [CrossRef] 2. Stevanović, B.; Knežević, L.; Čikarić, S.; Popov-Ilić, G.; Karaman, G.; ...
    ... на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs energies Article Application of a Method ...
    ... http://www.slglasnik. com/ (accessed on 22 August 2016). (In Serbian) © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4 ...

  • Evidence of Variscan and Alpine tectonics in the structural and thermochronological record of the central Serbo-Macedonian Massif (south-eastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Richard Spikings, Andreas Wetzel (2016)
    General Earth and Planetary Sciences
    ... ets complex During the late Early Cretaceous, the Vlasina Unit was thrust to the east onto the Struma and other Getic units along a system of cast- to north-east-vergent thrusts (Petković 1930; Mihailescu et al. 1967; Petrović 1969; Zagorchev and Ruseva 1982; Lilov and Zagorchev 1993; Kounov ...
    ... Lower Complex Penetrative foliation S, in the area surrounding the Bujano- vac magmatic complex (Figs. 3, 4c) is generally dipping towards the cast to south-east at moderate angles (Fig. 4c). It is commonly defined by biotite, muscovite, and flat- tened quartz-feldspar aggregates. Variation ...
    ... ette) is indicated by a black rectangle in the inset. c Thin section of a C' shear bands observed in gneiss north of Vranje show top-to-the-south-cast direction of tectonic transport (Figs. 5d, 6). C” shear bands, 4-type mantled clasts, and polycrystalline sigmoids observed in the western periphery ...

  • Процена емисије гасова са ефектом стаклене баште као последице енергетске активности

    Горана Остојић (2024)
    Рад се бави анализом и проценом емисија гасова са ефектом стаклене баште, са посебним акцентом на емисије које настају као последица енергетских активности. Ефекат стаклене баште представља природни процес који је неопходан за одржавање живота на Земљи, али антропогене активности, попут индустријске производње и сагоревања фосилних горива, значајно повећавају концентрацију ових гасова у атмосфери, што доводи до климатских промена. Рад истражује узроке, последице и могућности за смањење емисија гасова, као и развој стратегија за ублажавање негативних ефеката на животну ...
    емисија гасова, ефекат стаклене баште, енергетске активности, климатске промене, мобилно сагоревање, стационарно сагоревање
    ... the generation of clectricity and hcat for own use in these andustries, Emissions arising from fuel combustion for thec production of coke, brown coal briquettes and patent fucl, Manujacture of: Solid Fuels Other Energy lndustries Manufacturing Industries and Construction Combustion emisstons ...
    ... emissioms from own-cnergy usc for thc producton of charcoal, bagasse, saw dust, cotton stalks and carbonizing of biofuels as well as fuel used for coal mining, oil and gas extraction and the processing and upgrading of natural gas. This category also icludes emissions from - processmng for CO,; capture ...
    ... на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs YnaupBep3urer y Beorpajty Pynapcko-reouomiku ...

  • Методологија интегралне анализе сценарија енергетског развоја

    Александар Маџаревић (2019)
    енергетска безбедност, сценарио развоја, фази логика, сигурност снабдевања, доступност, расположивост, природни гас
    ... Sulphur oxide ,2018 Soud, H., Fukasawa, K., Developments in NOx abatement and control, IEACR/89, IEA Coal Research, London, 1996. Carpenter, A., Davidson, R., NOx emissions and control, IEA Clean Coal Centre, London, UK, 2006. IEA, NOx Emissions from Fuel Combustion, 2018b, доступно на: https://webstore ...
    ... да је имплементација и даље на нижем нивоу (Radovanovic, M. et al., 2018). Енергетска безбедност ЕУ угрожена је унутрашњим изазовом: микс националног мини тржишта и недостатак политичке кохезије и солидарности (Radovanovic, M. et al., 2018). Поред тога, енергетске стратегије ЕУ се у великој мери ослањају ...
    ... на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs УНИВЕРЗИТЕТ У БЕОГРАДУ РУДАРСКО-ГЕОЛОШКИ ...

  • Age and microfacies of oceanic Upper Triassic radiolarite components from the Middle Jurassic ophiolitic mélange in the Zlatibor Mountains (Inner Dinarides, Serbia) and their provenance

    Hans-Juergen Gawlick, Nevenka Đerić, Sigrid Missoni, Nikita Bragin, Milan Sudar, Divna Jovanović (2017)
    Neo-Tethys, trench-like basins, synorogenic deposition, evolving thrust belt, Triassic palaeogeography
    ... obducted ophiolites from the Neo-Tethys to the cast (e.g., Gawlick et al. 2008, 2009b, 2016b; Schmid et al. 2008) or are they relics of an auto- chthonous oceanic realm between the Durmitor mega-unit to the west and the Drina-Ivanjica unit to the cast (e.g., Dimitrijević 1997; Karamata 2006)? For ...
    ... below. The block spectrum of the underlying and slightly older carbonate-clastic mćlange points to a deposition of the sedimentary ophiolitic mćlange cast of or on top of the Drina-Ivanjica unit. Keywords: Neo-Tethys, trench-like basins, synorogenic dcposition, evolving thrust belt, Triassic palaceogeography ...
    ... recycling of sediments. J. Sediment. Petrol. 37, 1031—1044. Blome C.D. 1983: Upper Triassic Capnuchosphaeridac and Capno- docinae (Radiolaria) from “cast-central Oregon. Micro- paleontology 29, 11—49. Blome C.D. 1984: Upper Triassic radiolaria and radiolarian zonation from Western North America ...