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Now showing items 1-20 of 155
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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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(2006)The Miranda do Douro orthogneiss was believed to be the oldest magmatic rock of the Central Iberian Zone, on the base of a U-Pb discordia upper intercept of 618 ± 9 Ma. Nevertheless, new ion-microprobe and LA-ICPMS U-Pb ...
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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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(2006)The Southern Urals of Russia contain what is arguably one of the best-preserved examples of an arc-continent collision in any Paleozoic orogen. The arc-continent collision history recorded in the rocks of the Southern Urals ...
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(2006)The Arenig ostracod fauna of Baltoscandia is the oldest known and amongst the most thoroughly studied ostracod faunas in the world. The fauna is dominated by eridostracans and palaeocopes, and comprises altogether about ...
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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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(2006)Bromalites from the Soom Shale are allocated to five main categories on the basis of shape, content and internal structure: those containing broken conodont elements; those containing brachiopod fragments; corrugated/spiral ...
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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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(2006)Minor and trace element compositions of a suite of Ordovician, Silurian, and Permian conodonts have been characterised by laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS). Continuous, high-resolution ...
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(2006)The Baltic Ordovician-Silurian sedimentary succession embodies numerous altered volcanic ash beds that are illite-smectite dominated. Only a few beds rich in chlorite-smectite are known from the Upper Ordovician Pirgu Stage ...
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(2006)The correspondence between atmospheric CO2 concentrations and globally averaged surface temperatures in the recent past suggests that this coupling may be of great antiquity. Here, I compare 490 published proxy records of ...
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(2006)Chinese Altai has proterozoic basement, and probably experienced four major events during Proterozoic era. Research about Precambrian basement is the base of dertermination of Altai-Momgolia microcontinent. The span of ...
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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 ...
Now showing items 1-20 of 155