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Now showing items 1-20 of 181
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(2002)A method for conodont identification in thin and polished sections based on morphological and histological features is discussed. The diagnostic key and examples from the Lower Carboniferous of the Subpolar Ural Mountains ...
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(2003)A new placoderm species, Bothriolepis sosnensis sp. nov., from the Zadonskian Horizon (Lower Famennian) of the gravelly sands in the Lime Factory quarry situated at the southwestern outskirts of the town of Livny (Orel ...
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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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(2001)The objectives of this study are to: assess the regional contribution of outcrop-scale structures in well-exposed rocks of a tectonic province; and evaluate how failure to measure this scale of structure affects the ...
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(2002)Theoretical models predict a marked increase in atmospheric O2 to ~35% during the Permo-Carboniferous (~300 Ma) occurring against a low (~0.03%) CO2 level. An upper O2 value of 35%, however, remains disputed because ignition ...
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(2002)Carbon isotope records for inorganic and total organic carbon (TOC) as well as for individual organic biomarkers show two positive excursions in the Late Frasnian with comparable shape and amplitude in δ13C. The positive ...
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(2001)The stratigraphic range of stromatoporoids in the Devonian of the Russian Platform and the taxonomic composition of stromatoporoids are emended; new generic names and new descriptions of two known species are presented. ...
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(1999)Although submarine methane hydrates or clathrates have been highlighted as potential amplifiers of modern global climate change and associated glacio-eustatic sea-level rise, their potential role in sea-level fall has not ...
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(2006)The Devonian sedimentary rocks of the UK are made up of a continental red bed facies, the Old Red Sandstone (ORS), and sediments of a marine origin. The latter are confined to southwest England whereas the ORS occurs much ...
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(2001)The task of this paper is to discuss the Frasnian Stratigraphy of the central region of the Russian Platform; to analyse the distribution of the most abundantly occurring platform conodonts: to revise the zonal schemes ...
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(1997)The estimated path of seawater 87Sr/86Sr during the Silurian and Devonian is based on 86 analyses (84 whole rocks) presented here and in other published results. The seawater 87Sr/86Sr rose steadily throughout the Silurian ...
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(2003)When using 36Cl to date very old groundwater in regional aquifer systems, knowledge of the subsurface 36Cl input into the aquifer system is essential. Although 36Cl can be produced through nuclear reactions in the subsurface, ...
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(2006)Calcareous tube-worms generally identified as Spirorbis range from Ordovician to Recent, often profusely encrusting shells and other substrates. Whereas Recent Spirorbis is a polychaete annelid, details of tube structure ...
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(2001)Multi-stage development of carbonate buildups has been recognised in the Bol'shaya Nadota Carbonate Complex, in the vicinity of the town of Inta (Subpolar Urals). The growth of typical stromatoporoid-coral bioherms, ...
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(1987)Oriented kimberlite specimens (total of 200 pieces) were collected on the benches and in the bed of an exploratory opencut that exposed bedrock to a depth of 7 to 8 m at about the center of the pipe. The porphyric kimberlite ...
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(1990)Mongolia contains extensively developed Devonian marine deposits, which are characterized by latitudinal facies zoning. At the present time, R. Ye. Alekseyeva has established the following horizons in the Lower and Middle ...
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(2003)Results of the revision of the taxonomic composition of Nervostrophiinae from the Devonian of the Russian Platform based on the A.I. Ljaschenko memorial collection are presented. Three new genera and seven new species ...
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(2001)In the Devonian series of northeastern Asia all standard stage boundaries are recognised using conodont indexes, as well as guides as guides of other fossil groups. Other potential correlation means include event boundaries ...
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(2004)Devonian deep-water deposits of the Southern Urals are represented mainly by flysch and cherty units. The main sedimentary basins (marginal sea and back-arc basin) and their origin, evolution and principal depositional ...
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(2004)The Early Paleozoic regression resulted in emergence of the Angaraland. Devonian deposits accumulated in various sedimentary basins, e.g., in gulfs far incised into the Angaraland, as well as in lagoons and lakes. In ...
Now showing items 1-20 of 181