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Now showing items 1-20 of 218
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(1999)Following accretion of southern Siberian microcontinents to the Siberian craton in the Early Paleozoic, five cycles of K-rich silicic magmatism, progressively decaying in volume, occurred on batholithic scales throughout ...
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(2001)A new cryplocrinid, Paracryptocrinites bockeliei gen. et sp. nov. (Eocrinoidea, Echinodermata), from the Volkhov (Upper Arenigian, Ordovician) Bioherm-related Facies of the eastern Leningrad region is described. The structure ...
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(2001)A new cryplocrinid, Paracryptocrinites bockeliei gen. et sp. nov. (Eocrinoidea, Echinodermata), from the Volkhov (Upper Arenigian, Ordovician) Bioherm-related Facies of the eastern Leningrad region is described. The structure ...
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(2001)The Mäekalda section presents a c. 12 m thick succession of mainly limestones, dolomites and siltstones of late Tremadoc to late Llanvirn age, exposed on the eastern outskirts of Tallinn, northern Estonia. The condensed ...
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(2002)Analysis of numerous conodont element clusters from the Lower Ordovician cherts of the Burubaital Formation in central Kazakhstan reveals that the apparatus of Paracordylodus gracilis Lindstro¨m, 1955 consisted of 15 ...
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(1988)The base of the Cordylodus proavus conodont Zone is the most appropriate horizon for the Cambrian–Ordovician Boundary. At Batyrbay the horizon reflects a significant global eustatic event that is marked by distinctive ...
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(2004)Acritarchs, the fossilizable, resting cysts of phytoplanktonic algal protists, are the dominant component of marine organic-walled microfossils in the Palaeozoic. The majority of acritarchs show strong similarities with ...
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BRACHIOPODS OF THE REDEFINED FAMILY TRITOECHIIDAE FROM THE ORDOVICIAN OF KAZAKHSTAN AND SOUTH URALS (2001)The Tritoechiidae are redefined following study of nine species of the genera Tritoechia, Eremotoechia, Martellia Pomatotrema, Protambonites and Korinevskia nov. gen. in Kazakhstanian brachiopod faunas from the upper ...
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(2002)Brachiopod-dominated palaeocommunities incorporating a structure typical of faunal groups within the Palaeozoic Evolutionary Fauna were already present in North and East Gondwana and associated terranes as early as the ...
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BRYOZOANS OF THE GENUS DIPLOTRYPA NICHOLSON, 1879 FROM THE MIDDLE ORDOVICIAN OF THE LENINGRAD REGION (2004)The two earliest members of the genus Diplotrypa (D. olgae sp. nov. and D. catenulata Coryell, 1921) are described from the Middle Ordovician of the Leningrad Region. The diagnosis, composition, and occurrence of this genus ...
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(2001)Carbonate platform deposits of the Shabakty Group in the Malyi Karatau Range of southern Kazakhstan contain rich brachiopod faunas of early Cambrian (Botomian)-early Ordovician (Arenig) age. Seven biostratigraphically ...
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(2004)Biostratigraphical study of the early to mid-Ordovician conodont fauna from ribbon-banded radiolarian cherts of the middle Burubaital Formation in Central Kazakhstan reveals an almost complete succession of conodont biozones ...
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(2004)The growth and microstructure of deltidial covering plates of Lower and Middle Ordovician Clitambonitidines from Estonia and Leningrad Region are reviewed. In the genera Anchigonites, Antigonambonites, Vellamo, and Estlandia, ...
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DIAGENETIC AND CATAGENETIC PRODUCTS OF ISORENIERATENE: MOLECULAR INDICATORS FOR PHOTIC ZONE ANOXIA (1996)A wide range of novel diagenetic and catagenetic products of the diaromatic carotenoid isorenieratene, a pigment of the photosynthetic green sulphur bacteria Chlorobiaceae, has been identified in a number of sedimentary ...
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(2002)During the Arenig-Llanvirn interval a series of radiations across all the major clades, established the Brachiopoda as a major component of the Palaeozoic benthos. Radiations on Baltica and Laurentia during the Arenig ...
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(1996)The unstable sea-level position in the Cambrian-Ordovician boundary interval resulted in several consequent eustatic minima. Among them, the Lange Ranch (the base of the proavus Zone),Acerocare (the base of the Tremadocian, ...
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(2001)Upper Cambrian to Lower Ordovician radiolarites (alternations of ribbon-banded radiolarian cherts and siliceous shales) from Kazakhstan are dated accurately by means of conodonts. They represent the only known continuous ...
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(1998)Proto-, para-, and euconodonts are characterized, and their stratigraphic significance is evaluated. General evolutionary trends and stages of development are depicted for the Proconodontus, Teridontus, and Hirsutodontus ...
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(2003)On the basis of generalizations and analysis of new materials on regional and thematic research, the main problems involved with the evolution of the Paleo-Аsian ocean and structure of the huge Ural-Mongolian Fold Belt ...
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(2004)We have analysed 129 stratigraphic sections from the Timan-Pechora basin, from its adjacent continental shelf and from the South Barents Sea basin, in order to determine whether existing models of extensional sedimentary ...
Now showing items 1-20 of 218