Micropalaeontological Research in European Upper Carboniferous Stratigraphy
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Abstract A synopsis is given of the most recent developments from micropalaeontological research on the coal-bearing Upper Carboniferous (Namurian C—Westphalian C) of Westphalia. The hope is expressed that a wider use of the technique of breaking down the mudstones into mud and isolating the fossils will, in conjunction with the important palaeontological results obtained in the English coal-basins, facilitate correlation between the Upper Carboniferous (Westphalian A to C) of England and Germany; also that the same technique will enable deep borings to be correlated in greater detail.Keywords:
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Upper Carboniferous pebbles are known from Miocene conglomerates (Szászvár Formation) in the Mecsek Mts. Some pebbles may contain floral elements. Fine-grained siltstone is the most common fossiliferous rock. There are known leaf and stem fragments and some silicified wood-trunk fragments. These floral elements show Namurian to late Westphalian ages, but primarily the Westphalian B and C. The floral elements could be related to the Polish Carboniferous flora, particularly that of Silesia.
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ACCUMULATIONS OF LOWER NAMURIAN COAL FRAGMENTS AND PEBBLES IN THE SANDSTONES OF THE ŁAZISKA BEDS OF BORE HOLE PŁAZA 203 (UPPER SILESIAN COAL BASIN) The new bore hole ,;Plaza 203, put down by the Coal Industry in Chrazanow county, in the eastern part of the Upper Silesian Coal Basin, has pierce; aside of younger deposits, higher Coal Measure horizons too, to wit: the Libiąz beds (Westphalian D), the Łaziska beds (Westphalian C), and part of the Orzesze beds (Westphalian B). In the lower part of the Łaziska beds there was found an occurrence of coal fragments and pebbles embedded as a secondary deposit in sandstones. There principal, horizons of of accumulation of such pebbles were observed, at the depths of: 760.0 -769.8 m., 957.8 -962.0 m., and 1039.0 -1053.1 m. respectively.
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THE PROBLEM OF INTRA-CARBONIFEROUS DISCORDANCES IN THE NORTH-WESTERN PART OF THE INTRA-SUDETIC TROUGH Summary The article deals with the problem of the relation between the Upper and Lower Carboniferous formations in the north-western part of the Intra-Sudetic depression. Towards the east, the area under discussion joins the Walbrzych Coal Basin, in which a somewhat different facial development and greater thickness are observed. A comparison of the Carboniferous series in both areas forced some geologists to accept the presence of the Intra-Carboniferous discordance in the area considered. The present author (K. Dziedzic, 1960, 1961) already earlier pointed to a continuous sedimentation in this area, similarly as in the Walbrzych Coal Basin. According to this author the differences in the development of the Carboniferous series were a result of specific structural character of either region and not due to discordance. The Walbrzych region reveals some features of a basin, whereas the western one discloses certain properties of piedmont area. The Walbrzych region that embraces the Walbrzych Coal Basin and the adjacent areas was an early Hercynian structure of crypto-volcanic origin (K. Dziedzic, 1966). At the late Devonian time, the Walbrzych Coal Basin developed within this structure. It was formed due to a mechanism of cauldron subsidence type. In the Lower Carboniferous period, the basin was long influenced by marine conditions. In the Upper Carboniferous, however, a rich boggy-marshy subfacies developed. In the western region of piedmont type, coarse-elastic alluvia predominated. The boggy-marshy or fine-grained subfacies was restricted to the riverside overflood plains only. Stream and torrent deposits are here a prevailing type of formations. The examinations point also to the existence of meandering streams and to the migration of river channels.
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Late Devonian extinction
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Ironstone
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Abstract A synopsis is given of the most recent developments from micropalaeontological research on the coal-bearing Upper Carboniferous (Namurian C—Westphalian C) of Westphalia. The hope is expressed that a wider use of the technique of breaking down the mudstones into mud and isolating the fossils will, in conjunction with the important palaeontological results obtained in the English coal-basins, facilitate correlation between the Upper Carboniferous (Westphalian A to C) of England and Germany; also that the same technique will enable deep borings to be correlated in greater detail.
Westphalian sovereignty
Coal measures
Coal basin
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