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Tytuł:
Palynological constraints on the age of the Carboniferous clastic succession of SW Poland (Fore-Sudetic area) based on miospore data
Autorzy:
Górecka-Nowak, A.
Tematy:
palynostratigraphy
Namurian
redeposition
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Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/2059487.pdf  Link otwiera się w nowym oknie
Opis:
New palynological studies of the Carboniferous clastic deposits of SW Poland from six deep boreholes have provided diverse, but poorly preserved miospore assemblages. Probably all of these are mixed, consisting of taxa typical of the in terval from the Famennian to the Namurian. Namurian A deposits have been identified in the Paproć 29 and Katarzynin 2 boreholes. The stratigraphic position of rocks from other profiles, where miospores were more badly preserved, has been established in a more general way. In the Objezierze IG 1 borehole the rocks were dated as not older than late Viséan while rocks from the Kalisz IG 1, Dankowice IG 1 and Dymek IG 1 boreholes are considered as not older than Viséan. The abundance of reworked miospores in rocks from the Paproć 29 and Katarzynin 2 boreholes is proof that cannibalzation of older rocks containing miospores took place in this sedimentary basin in the early Namurian. Source rocks belonged either to the Famennian-Tournaisian and Viséan or to a Viséan inter valcontaining Famennian-Tournaisian reworked miospores. Some observations on the limitations of the stratigraphical interpretation of those mixed and poorly preserved miospore assemblages are provided.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Palynological data from the Siciny IG 1 and Marcinki IG 1 bore holes and their significance to the interpretation of the Carboniferous succession of SW Poland
Autorzy:
Górecka-Nowak, A.
Tematy:
Carboniferous
palynostratigraphy
redeposition
tectonical deformation
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Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/2059199.pdf  Link otwiera się w nowym oknie
Opis:
This paper describes in detail palynological data from the Carboniferous siliciclastic rock succession from the Siciny IG 1 and Marcinki IG 1 boreholes (SW Poland), that allow reinterpretation of the local stratigraphy. Two rock series of different ages were recognized. Rocks from the Siciny IG 1 section were assigned to the upper Arnsbergian–Alportian (the Lycospora subtriquetra–Kraeuselisporites ornatus (SO) Biozone) and the Bolsovian (the Torispora securis–Torispora laevigata (SL) Biozone). In the upper part of the Carboniferous section in the Marcinki IG 1 section the upper Arnsbergian–Alportian and Duckmantian interval (the Lycospora subtriquetra–Kraeuselisporites ornatus (SO) and the Microreticulatisporites nobilis–Florinites junior (NJ) biozones respectively) were recognized, although the quality of the palynological data from the latter borehole was generally poor. These results conflict with a Viséan age for these rocks interpreted from fossil marine macrofaunas and indicate the reworked nature of the macrofaunas. Possible means of the macrofaunal reworking, sedimentary environment and thermal history, based on the palynological data, are discussed. Repetition of the stratigraphical succession, probably due totectonic deformation of the rocks in both sections, is demonstrated and indicate a post-Bolsovian age for the deformation event.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Clasts derived from rhizocretions in shallow-marine Miocene clastic deposits of northern Hungary: an example of zombie structures
Autorzy:
Uchman, Alfred
Dávid, Árpád
Fodor, Rozália
Tematy:
redeposition
concretions
rhizocretions
alaeosols
clastic deposits
Neogene
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Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/25173307.pdf  Link otwiera się w nowym oknie
Opis:
Disc- and cylindrical-shaped clasts of fine-grained calcareous and ferruginous rock, each with a central tunnel, occur in shallow marine brackish Miocene sandy deposits of the Egyházasgerge Formation in Hungary. Previously, these have been interpreted as enigmatic biogenic (?) structures. After field and laboratory examination and comparisons with sub-recent rhizoclasts in subsoils developed on Quaternary fine-grained deposits in SE Poland, they are re-interpreted as redeposited rhizocretions possibly washed out of the coeval continental deposits of the Salgótarján Lignite Formation. Most are fragmented and abraded. They are termed rhizoclasts and are presented as an example of zombie structures inherited from another environment where they played a different role. Such rhizoclasts can be considered as an indicator of the source of the clastic material transported from a vegetated landmass on which moderate or poorly drained soils develop and plant roots penetrate the fine-grained substrate. In such soils, iron was mobilized, then fixed by oxidation, as the water table and oxygen levels fluctuated.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Timing of the onset of Devonian sedimentation in northwestern Poalnd: palynological evidence
Początek dewońskiej sedymentacji w północno-zachodniej Polsce: przesłanki palinologiczne
Autorzy:
Turnau, E.
Matyja, H.
Tematy:
northwestern Poland
Ordovician
Silurian
Devonian
sporomorphs
stratigraphy
redeposition
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Wydawca:
Polskie Towarzystwo Geologiczne
Powiązania:
https://bibliotekanauki.pl/articles/191429.pdf  Link otwiera się w nowym oknie
Opis:
Palynomorph assemblages of low taxonomic diversity are recorded from the basal Devonian strata in three boreholes in western Pomerania and Kujawy. The palynoflora is assigned to a younger, autochtonous assemblage, and an older, redeposited one. The composition of the younger assemblage suggests lower to middle Eifelian. The older palynomorphs are derived from (1) Upper Ordovician or Lower Silurian, and (2) probably from Upper Silurian deposits.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Origin of parautochthonous Polish moldavites : a palaeogeographical and petrographical study
Autorzy:
Szopa, K.
Badura, J.
Brachaniec, T.
Chew, D.
Karwowski, Ł.
Tematy:
Polish tektites
redeposition
river terrace
Miocene
Pleistocene
drainage basin
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Wydawca:
Polskie Towarzystwo Geologiczne
Powiązania:
https://bibliotekanauki.pl/articles/191842.pdf  Link otwiera się w nowym oknie
Opis:
In this article, the most recent moldavite discoveries in Poland and their host sediments are characterised and discussed. They were discovered at Lasów, located about 8 km north of Zgorzelec (Poland) and Görlitz (Germany), about 700 m from the Polish-German border, close to the Lusatian Neisse (Nysa) River. The tektites were collected from Vistulian (Wiechselian) glacial age sand and gravel of a closed quarry pit, associated with the river terraces. In the Lasów area, the moldavite-bearing sediments are Pleistocene in age and represent Lusatian Neisse terrace deposits. They were redeposited from the upper part of the drainage basin of the Lusatian Neisse, probably washed out from the Miocene sediments that filled the Zittau Depression, the Berzdorf–Radomierzyce Depression, the Višňová Depression and the tectonically uplifted Izera Mts. and Działoszyn Depression. The erosion of Miocene deposit occured on a large scale in the uplifted foothills of the Upper Miocene Izera, Lusatia and Kaczawa complexes. The sediment cover was removed from the Działoszyn Depression. The drainage basin of the Lusatian Neisse is the area where moldavites were formed by the Nördlinger Ries impact. The source area of moldavite is the same for the Miocene deposits around Gozdnica, as well as for the Pleistocene sediments at Lasów.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationship between the abrasion of tektite clasts and their host sedimentary facies, Pleistocene, SW Poland
Autorzy:
Brachaniec, Tomasz
Tematy:
moldavite
fluvial redeposition
sedimentary facies
abrasion
laboratory experiments
provenance
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Wydawca:
Polskie Towarzystwo Geologiczne
Powiązania:
https://bibliotekanauki.pl/articles/191905.pdf  Link otwiera się w nowym oknie
Opis:
This study reports on the occurrence of tektite clasts with a markedly different degree of abrasion in two different fluvial facies of the Pleistocene deposits of the Nysa Kłodzka river near Paczków, SW Poland. The question addressed by the study is whether the redeposited and differently abraded tektite glass clasts derive from different distances/sources, or whether their differing degree of abrasion relates to their different host sediment as the medium of river bedload transport. Laboratory tumbling experiments are used to estimate the progress of tektite abrasion with the distance travelled within a bedload sediment of the corresponding grain-size composition. The study concludes that there is a direct relationship between the abrasion degree of tektites and their host sediment facies, but it is not simple and straight forward, as a range of specific factors comes potentially into play. Their role is discussed and is recommended to be taken into account in an abrasion experiment design and in the interpretation of experimental results. The study suggests that the tektite clasts found near Paczków were transported over a distance of about 2-4 km and were derived from denudation of the nearby Bardzkie Mts.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Miospore evidence for the Carboniferous age of rocks from the Świebodzice Unit (Sudetes, SW Poland)
Autorzy:
Pluta, K.
Górecka-Nowak, A.
Tematy:
Świebodzice Unit
Devonian
Carboniferous
redeposition
stratigraphical leakage
thermal event
Pokaż więcej
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/2059361.pdf  Link otwiera się w nowym oknie
Opis:
The paper provides new results of palynological studies of rocks from the Świebodzice Unit. An abundant Carboniferous miospores were found in rocks of the Pogorzała Formation from the southern part of this unit. These miospores occur in rocks containing also macrofloral and marine macrofaunal fossils, partly reworked, which were usually considered Upper Devonian. Two miospore sub-assemblages of different ages and colours have been distinguished. One of them consists of poorly preserved miospores, dark in colour, which indicate the Late Visean–Serpukhovian age of the rocks. The other sub-assemblage, found only in a few samples, consists of much lighter and well-preserved miospores of the Asturian age. Their presence is considered as a result of stratigraphical leakage. Observation of the miospore colour indicates that the thermal event occurred after the Late Devonian and before the Asturian and the palaeotemperature exceeded ~180°C. These new data indicate that the geological history of the Świebodzice Unit lasted longer and was much complex than it was previously considered.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 23

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