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Tytuł:
Analysis of the trace fossils from Paleogene formations of the Central Western Carpathian (Orava region)
Autorzy:
Simo, V.
Starek, D.
Powiązania:
https://bibliotekanauki.pl/articles/184756.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
outcrop
palaeoenvironment
assemblage
Opis:
Up to now only little attention was dedicated to the study of the trace fossils in the development of the Central Carpathian Paleogene Basin in the Orava region. Occasional trace fossils findings from the Central Carpathian Paleogene formations in the Orava and others regions were referred by Plička (1987). Other specialized works on trace fossils from these formations from the Orava region were not published. Study of trace fossils is strongly influenced by the existence of well exposed outcrops within individual formations. The best exposed outcrops are situated in the basal Borové Formation as well as in the higher parts of Paleogene sequences – mainly in the Zuberec Formation. This preliminary study shows a relatively rich diversity of trace fossils associations across the Central Carpathian Paleogene Basin. We present new finds of trace fossils, within which we have classified 7 ichnogenera, 11 ichnospecies and 2 types of trace fossils, which were not closely systematically classified. Many trace fossils identified in the Orava region are typical for some palaeoenvironments, which are characterized by a specific lithology, nature of the substrate, dynamics of the environment, amount of nutrients and stability or fluctuations of oxygen in the bottom waters. The trace fossils assemblages reflect changes of depositional systems during the tectonic and sequence stratigraphic development of the basin. Early Eocene shallow-sea environment of the Borové Formation including the rocky coast, sandy dynamic littoral, transition - al and internal shelf zones are characterized by findings of traces of Entobia, Gastrochaenolites, Nummipera, Ophiomorpha and Skolithos. On the contrary, a significant deepening of the deposition environment during the Oligocene, documented by turbidite sedimentation of Zuberec and Biely Potok formations is characterised by findings of graphoglyptids ( Spirorhaphe, Nereites, Paleodiction, Protopaleodictyon, Megagrapton ) or traces of deposit feeders ( Arthrophycus, Chondrites, Planolites, Phycodes, Scolicia, Zoophycos).
Źródło:
Geology, Geophysics and Environment; 2016, 42, 1; 126
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corrosion of carbonate speleothems by an allogenic river inferred from petrography and a weight loss experiment : a case study from the Demänová Cave System, Slovakia
Autorzy:
Sala, Przemysław
Bella, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/27311293.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Karst
carbonates
hiatus
dissolution
palaeoenvironment
Opis:
The crystallization of speleothems can be interrupted by the invasion of allogenic water into cave passages. These interruptions were studied, both in speleothems currently submerged in an underground river and in speleothem sections, which were found at the lowermost fluvially active passage level of the Demänová Cave System. The interaction between speleothems and allogenic water, undersaturated with respect to calcite, is manifested in the presence of siliciclastic material and the corrosion of calcite crystals. The progressive development of corrosion features depends on the duration of the interaction of calcite crystals with allogenic water. Moreover, the movement of the water and siliciclastic deposition over the speleothems can influence the corrosion process. The estimated rate of corrosion, caused by the underground Demänovka River and measured by the weight loss of experimental tablets, is up to 0.029 mm/y. U-series dating indicated that the interaction of speleothems with allogenic water occurred during the Vistulian (Weichselian). The identification of corrosion episodes, caused by allogenic water, is a step towards understanding the origin of hiatuses and establishing criteria for recognition of them.
Źródło:
Annales Societatis Geologorum Poloniae; 2023, 93, 4; 467--481
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geochemical characteristics of Neogene methane-bearing lignite of the Bełchatów region
Autorzy:
Maruta, M.
Zakrzewski, A.
Powiązania:
https://bibliotekanauki.pl/articles/299185.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
tertiary lignite
geochemical analysis
palaeoenvironment
methane
Opis:
Coal beds could contain various amount of methane. This attribute might be dangerous in shafts or quarrying. Among other things, the works in the coal beds, including drilling, potentially there is a risk of exceeding the methane lower explosive limit. But on the other hand it is a source of unconventional hydrocarbon accumulations. In this paper geochemical characteristic of organic matter of tertiary brown coal from central part of Poland were performed. Geochemical surveys helps to know about genesis of methane from study area. The analysed samples contain various quantity of organic carbon, from 20,74 to 71.93 wt. %. Lignite from examine samples have weak hydrocarbon potential. In tertiary sediments prevails III type of kerogen with admixture of II type of kerogen. The thermal maturity of the tertiary organic matter changes within the interval from 354 to 419 in Tmax scale. Organic matter is immature. The composition of bitumens is different in various part of study area. Elemental analysis confirm that brown coal was comprised mostly by humic-group macerals. Coal samples contain methane with mixed genesis.
Źródło:
AGH Drilling, Oil, Gas; 2017, 34, 1; 81-93
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Turonian-Coniacian (Upper Cretaceous) of the Babadag Basin (North Dobrogea, Romania) : integrated biostratigraphy and microfacies succession
Autorzy:
Lodowski, Damian Gerard
Walaszczyk, Ireneusz Piotr
Grădinaru, Eugen
Powiązania:
https://bibliotekanauki.pl/articles/2058617.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
microfacies
petrology
inoceramids
ammonites
foraminifera
palaeoenvironment
Opis:
The Upper Turonian to Middle Coniacian (Upper Cretaceous) succession of the Babadag Basin (North Dobrogea, Romania) constitutes an apparently continuous fossiliferous carbonate succession. The presence of moderately rich inoceramid, ammonite and foraminiferal assemblages allows for the application of a precise biostratigraphic subdivision. The palaeoenvironmental conditions and evolution of the Babadag Basin during the Late Turonian-Middle Coniacian are inferred using microfacies analysis and foraminiferal spectra. Together, these suggest the Turonian-Coniacian Badabag Basin reflects relatively shallow-water conditions in a near-shore environment, punctuated by two regression events in the Late Turonian and in the Middle Coniacian.
Źródło:
Geological Quarterly; 2019, 63, 1; 39--64
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Malacofauna of the Holsteinian lake deposits at Hrud II (Eastern Poland) and its palaeoecological significance
Autorzy:
Szymanek, M.
Powiązania:
https://bibliotekanauki.pl/articles/2058942.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Quaternary
Holsteinian
lake deposits
molluscs
palaeoenvironment
Opis:
Mollusc-bearing deposits at Hrud II (Eastern Poland) accumulated in the western part of a palaeolake of Holsteinian age (MIS 11). The faunal assemblage is typical of freshwater environments and presumably represents a part of the interglacial climatic optimum (Carpinus–Abies Zone). On the basis of its varied composition, the evolution of the water body is described. Reinterpretation of the data from the eastern part of the lake (Hrud I) and combining of the results from both sites enable a wider palaeoecological reconstruction. Fluctuations in lake level, water dynamics and changes in the aquatic vegetation are inferred from quantitative relations between selected molluscs, especially Lithoglyphus jahni, Valvata piscinalis and Bithynia tentaculata, which prevail in the deposits investigated. A predominance of Valvata piscinalis indicates a rise in water level, whereas the communities with abundant Bithynia opercula are typical of a more shallow lake with rich reed fields. Amelioration of the trophic conditions between the pre-optimal and optimal part of the Holsteinian Interglacial can also be recognised.
Źródło:
Geological Quarterly; 2012, 56, 1; 117-126
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Marine palynology and environmental interpretation of the Lower Cretaceous (Barremian?–Aptian) rock units in the Koppeh-Dagh Basin, NE Iran
Autorzy:
Sharifi, M.
Ghasemi-Nejad, E.
Sarfi, M.
Yazdi-Moghadam, M.
Tarjani-Salehani, M.
Akhtari, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059347.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Koppeh-Dagh
palynostratigraphy
palynofacies
palaeoecology
palaeoenvironment
Opis:
The Sarcheshmeh and Sanganeh formations are the Lower Cretaceous deep marine sequences of the Koppeh-Dagh sedimentary basin, which revealed a diverse assemblage of dinoflagellates. The paper discusses palynostratigraphy, palynofacies and palaeoenvironment of these rock units in a borehole drilled in the eastern part of this basin. Ninety-five ditch-cutting samples were prepared and studied palynologically, which resulted in recognition of 76 species of dinoflagellate cysts belonging to 29 genera. The recorded assemblages are in accordance with the Odontochitina operculata Zone suggesting a Barremian?–Aptian age for the formations. Palynological data extracted led to identification of five palynofacies types based on the categories of Tyson (1995). These indicate a marginal, proximal and distal shelf environment of deposition. The obtained data from calculated palaeoecological factors revealed a gradual sea level rise during the deposition of these rock units, resulting in replacement of the oxic/dysoxic Sarcheshmeh Formation by the dysoxic/anoxic Sanganeh Formation.
Źródło:
Geological Quarterly; 2018, 62, 1; 90--99
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagenetic alteration in low-Mg calcite from macrofossils : a review
Autorzy:
Ullmann, C. V.
Korte, C.
Powiązania:
https://bibliotekanauki.pl/articles/2059799.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
diagenetic alteration
macrofossil calcite
isotopes
palaeoenvironment
Opis:
The quality of palaeoenvironmental reconstructions based on macrofossil carbonate critically depends on preservation of the shell material because post-depositional processes can modify its structural, chemical and isotopic composition, potentially overprinting or completely erasing palaeoenvironmental information. A suite of methods can be employed to evaluate the impact of diagenetic processes on the primary geochemical signatures of samples. Here we review the benefits and shortcomings of the most commonly employed optical (optical microscopy, cathodoluminescence microscopy, scanning electron microscopy) and chemical (trace element abundances, isotopic ratios) screening techniques used to assess the alteration degree of low-Mg calcite macrofossils and summarize the findings on diagenetic trends observed for elemental and isotopic systems in such materials. For a robust evaluation of the preservation state of biogenic calcite, it is advisable to combine a set of complementary techniques. Absolute limiting values of element and isotope ratios for discarding diagenetically altered materials cannot be universally applied, but should rather be evaluated on a case to case basis. The evaluation can be improved by analyses of diagenetic carbonate and altered fossil materials, which help constraining the diagenetic trajectories in the sampled specimens. Quantification of post-depositional alteration is possible, but in most cases the complexity of diagenetic systems hampers the possibility of retrieving original proxy values for palaeoenvironmental reconstructions from partially altered materials.
Źródło:
Geological Quarterly; 2015, 59, 1; 3--20
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Homotryblium-dominated Eocene dinoflagellate cyst assemblages from Middle Miocene (Badenian) glauconitic sands at Lipowiec (Roztocze, SE Poland)
Autorzy:
Gedl, P.
Powiązania:
https://bibliotekanauki.pl/articles/2059861.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Eocene
Miocene
reworking
palaeoenvironment
Roztocze
SE Poland
Opis:
A section over 20 m thick of the basal Middle Miocene succession exposed at Lipowiec (Roztocze, SE Poland) was studied for palynology. Thirteen samples were collected from quartz and glauconitic-quartz sands and thin clay layers. Sand samples were barren but clay samples yielded dinoflagellate cysts. Their assemblages consist of reworked Paleogene specimens dominated by the Homotryblium floripes complex (H. floripes and morphologically similar H. plectilum and H. vallum). The presence of reworked Paleogene specimens indicates intense erosion of marine Paleogene strata during initial stages of the Middle Miocene transgression at Roztocze. Analysis of stratigraphical ranges of reworked dinoflagellate cysts and comparison with their occurrences in known epicontinental Paleogene sites of SE Poland suggest an Upper Eocene age of the washed-out strata. The taxonomic composition of the assemblages described suggests that the Upper Eocene deposits accumulated in a near-shore, lagoonal embayment characterized presumably by oligotrophic waters of slightly increased salinity. A high proportion of the Homotryblium floripes complex is also characteristic of reworked assemblages found in younger Miocene strata of neighbouring exposures in Roztocze, which indicates widespread Eocene lagoonal environments in this part of Roztocze. Coeval Eocene strata from the eastern part of Roztocze and from the Carpathian Foredeep show different taxonomic compositions suggesting varied sedimentary settings during Eocene transgression in this region. These differences reflect variable amounts of freshwater influence resulting in a range of environments that ranged from oligotrophic to brackish.
Źródło:
Geological Quarterly; 2016, 60, 2; 461--472
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Palaeofacies and biomarker characteristics of Paleogene to Neogene rocks in the Makassar Straits, Indonesia
Autorzy:
Sutadiwiria, Yarra
Hamdani, Ahmad Helman
Sendjaja, Yoga Andriana
Haryanto, Iyan
Siahaan, Yeftamikha
Siahaan, Mordekhai
Powiązania:
https://bibliotekanauki.pl/articles/94325.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
geochemistry
palaeoenvironment
taraxastane
oleanane
geochemia
paleośrodowisko
Indonezja
Opis:
Borehole K-1 is an exploratory well that was drilled in the North Makassar Basin (West Sulawesi) in 2011. Gas chromatography (GC) and gas chromatography-mass chromatography (GC-MS) analyses have been conducted on extracts from well cuttings from the Paleogene to Neogene interval in order to investigate the characteristics of biomarkers present. Although the well was drilled with oil-based mud and gas chromatographic analysis reveals that the alkane fractions are heavily contaminated, detailed investigation of biomarkers in these rock extracts and comparison with biomarkers in the oil-based mud has revealed that, while there are hopane and sterane biomarkers in the mud, there are also a discrete set of biomarkers that are indigenous to the rocks. These include oleanane, bicadinanes, taraxastane and other higher-plant-derived triterpanes. The presence of these compounds in environments that range from bathyal to marginal marine and even to lacustrine, shows the extent of reworking of terrestrial material into aquatic settings in this region during the Paleogene and Neogene and provides further evidence of a predominance of terrestrial material, even in deep-marine settings, with little ‘in-situ’ material noted. These findings have important implications for the use of biomarkers as indicators of palaeoenvironment in both source rocks and oils.
Źródło:
Geologos; 2019, 25, 1; 75-90
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Early Jurassic dinoflagellate cysts from the Kraków-Silesia Monocline, southern Poland: a record from the Blanowice Formation at Mrzygłód
Wczesnojurajskie dinocysty z Krakowsko-Śląskiej monokliny, polska południowa: zapis z formacji Blanowickiej w Mrzygłodzie
Autorzy:
Gedl, P.
Powiązania:
https://bibliotekanauki.pl/articles/191718.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
dinocysts
palynofacies
Lower Jurassic
Polska
biostratigraphy
palaeoenvironment
Opis:
A 3-m thick section of the Blanowice Formation exposed in an abandoned clay-pit at Mrzygłód (Kraków-Silesia Monocline, southern Poland) yielded rich palynological material. Besides dominating land- derived phytoclasts and sporomorphs organic-walled dinoflagellate cysts (dinocysts) occur. Presence of Luehndea spinosa allows considering time of deposition of studied deposits as Late Pliensbachian-earliest Toarcian. Quantitative fluctuations of main groups of palynofacies elements suggest variable sedimentological conditions of deposition within the southern part of the Polish epicontinental basin. Dominance of large-sized cuticle remains and lack of dinocysts occurs in sediments deposited in continental conditions. Occurrence of dinocysts and other aquatic palynomorphs takes place in sediments that have originated during marine ingression.
Epikontynentalna dolna jura w Polsce wykształcona jest w większości w facjach kontynentalnych. We wczesnej jurze zaznaczyło się jednak kilka ingresji morskich na teren dzisiejszej Polski, których najbardziej kompletny zapis znany jest z Polski północno-zachodniej. W pozostałych, peryferyjnych obszarach basenu zapis ingresji jest znacznie słabiej udokumentowany z uwagi na brak skamieniałości. Z tego powodu, jednostki litostratygraficzne epikontynentalnej dolnej jury tej częoeci Polski (Fig. 1, 2) są często pozbawione precyzyjnych datowań biostratygraficznych. Podjęte w ostatnich latach badania organicznych cyst Dinoflagellata (dinocyst) z epikontynentalnej jury Polski pokazują dużą ich przydatność dla biostratygrafii oraz, wraz z analizą palinofacji – dla rekonstrukcji środowiska sedymentacji tych osadów. Takie badania, podjęte w dolnojurajskim profilu formacji blanowickiej w nieczynnym wyrobisku cegielni w Mrzygłodzie (Fig. 3), są prezentowane w niniejszym artykule. Blisko 3 metrowy profil (Fig. 4) odsłania ciemne iłowce z zachowan ą pierwotną laminacją, przechodzące ku górze w jasnoszare iły z licznym uwęglonym detrytusem rooelinnym, które podścielają 10 cm pokład węgla. Powyżej odsłaniają się ponownie ciemno zabarwione iły. Z profilu pobrano 3 próbki, które poddano standardowej maceracji palinologicznej. Wszystkie próbki zawierają bardzo bogaty materiał palinologiczny zdominowany przez roślinne elementy pochodzenia lądowego. W próbce Mrz2 najliczniej występują dużych rozmiarów fitoklasty (Fig. 5); podobnie w próbce Mrz1, gdzie pojawiają się jednak nieliczne dinocysty z rodzaju Nannoceratopsis. W próbce tej zaznacza się również udział organicznej materii amorficznej (Fig. 6). Dinocysty najliczniej występują w próbce Mrz3, gdzie stanowią blisko 2% palinofacji. Próbka ta charakteryzuje się również dużym udziałem sporomorf (Fig. 5). Zespół dinocyst jest wyraźnie zdominowany przez przedstawicieli rodzaju Nannoceratopsis (Fig. 7, 8, 9). Jedynie w próbce Mrz3 pojawiają się pojedynczy przedstawiciele innych gatunków: Batiacasphaera sp., Luehndea spinosa, Mendicodinium spinosum. Obecność Luehndea spinosa wskazuje, że badane osady reprezentują górny pliensbach-najniższy toark. Analiza palinofacji wskazuje na zmienne warunki sedymentacji osadów z badanego profilu. Najniższa jego część powstawała w warunkach morskich, których odzwierciedleniem jest obecność dinocyst. Wyższa część profilu, w obrębie której występuje węgiel, powstała zapewne w środowisku lądowym (jeziorzyskowym?). Pojawienie się nielicznych dinocyst w stropowej partii profilu wskazuje na stopniowy powrót warunków morskich (brakicznych?) w trakcie jego powstawania.
Źródło:
Annales Societatis Geologorum Poloniae; 2007, 77, No 2; 147-159
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Late Badenian zooxanthellate corals of the Medobory Hills (western Ukraine) and their environmental significance
Autorzy:
Górka, A.
Powiązania:
https://bibliotekanauki.pl/articles/191800.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
corals
scleractinians
palaeoenvironment
Badenian
Middle Miocene
Ukraine
Opis:
Zooxanthellate corals in the Badenian (Langhian to lower Serravallian) of western Ukraine occur in different lithofacies, but are most abundant in the upper Badenian coralgal reefs of the Ternopil Beds. The coral assemblage consists of five genera, with two predominant (Tarbellastraea and Porites) and three strongly subordinate (Favia, Heliastraea, Siderastrea). The present study is the first record of Heliastraea defrancei in the Fore-Carpathian Basin. The taxonomic composition of the corals indicates that their development occurred in conditions of some ecological stress, most probably connected with climate (location at the northern limit of coral distribution) and sedimentary environment (possible influx of terrigenous material). The coral assemblage shows similarities to numerous fossil reefs of Miocene age from the Paratethyan and Mediterranean realms.
Źródło:
Annales Societatis Geologorum Poloniae; 2018, 88, 3; 243-256
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stratigraphy and palaeoenvironment of Stajna Cave (southern Poland) with regard to habitation of the site by Neanderthals
Autorzy:
Żarski, M.
Winter, H.
Nadachowski, A.
Urbanowski, M.
Socha, P.
Kenig, K.
Marcinkowski, B.
Krzemińska, E.
Stefaniak, K.
Nowaczewska, W.
Marciszak, A.
Powiązania:
https://bibliotekanauki.pl/articles/2060379.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Stajnia Cave
Neanderthal
Vistulian
palaeoenvironment
Częstochowa Upland
Opis:
The Stajnia Cave is one of the most important archaeological sites due to the finds of the first remains of Neanderthals in Poland, and several tens of thousands of flint artefacts from the Middle Palaeolithic. Based on geological, geochemical, palaeobotanical, palaeozoological, archaeological and isotope analyses, coupled with absolute age determinations (OSL, U-Th and C14), 15 lithostratigraphic layers were distinguished and palaeoenvironmental conditions during the sedimentation of these beds were determined. The cave loams accumulated through weathering, aeolian and fluvial processes. Their age may be correlated with an interval from the Early Glacial to the Late Pleniglacial of the Visulian (Weichselian) Glaciation. Archaeological relics related to the Neanderthals have been discovered in layer D with an absolute age of about 52,000–45,000 years BP and correlated with MIS 3 – the Middle Plenivistulian (Interplenivistulian). Climate oscillations in the Vistulian are reflected by the type of the sediments and their physical-chemical features, allowing determining warmer interstadial and colder stadial periods. Generally, the climate was cold, characteristic of tundra areas with a typical vegetation and fauna, and with the mean temperature of the warmest month not exceeding 12°C. Based on multi-proxy studies it can be concluded that from layer E1 upwards, the climate conditions became progressively drier. At that time, the climate was cold with continental features enhancing tundra domination. This conclusion is confirmed by palaeontological investigations and the record of stable oxygen isotopes in the teeth of reindeer. The studies have also indicated seasonal migration of reindeer on the tundra that surrounded the cave. Probably, short-term slight climate warmings occurred during the Middle Plenivistulian (Interplenivistulian).
Źródło:
Geological Quarterly; 2017, 61, 2; 350--369
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The history of the Yoldia Sea in Northern Estonia: palaeoenvironmental conditions and climatic oscillations
Autorzy:
Heinsalu, A.
Veski, S.
Powiązania:
https://bibliotekanauki.pl/articles/2059524.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Estonia
Yoldia Sea
palaeoenvironment
diatoms
pollen analysis
Opis:
Late glacial and Early Holocene sediment sequences from North ern Estonia were investigated using diatom and pollen analysis and the accelerator mass spectrometry (AMS) 14C dating. The results of diatom analysis indicate that fresh water conditions prevailed during the initial and final phases of the Yoldia Sea in the investigated area. A near-bottom saline water current that penetrated into the Baltic Sea Basin during the brackish phase of the Yoldia Sea spread into the Gulf of Finland at ca. 11 300-11 200 calendar years BP. Coastal upwelling probably caused mixing of the water column and the circulation of brackish water up to the surface incertain near-shore areas in the Gulf of Finland. A slight change in the pollen composition may suggest deterioration in the climate and can be correlated to the Preboreal Oscillation. AMS 14C dates on aquatic plant macrofossils suggest a reservoir ef fect more than 1000 year for the brackish phase of the Yoldia Sea.
Źródło:
Geological Quarterly; 2007, 51, 3; 295-306
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Taxonomy and palaeoecology of the Late Cretaceous (Campanian) Phymatellidae (lithistid demosponges) from the Miechów and Mogilno-Łódź synclinoria (southern and central Poland)
Autorzy:
Świerczewska-Gładysz, Ewa
Jurkowska, Agata
Powiązania:
https://bibliotekanauki.pl/articles/24264693.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Fossil sponges
lithistid demosponges
facies
Cretaceous
palaeoenvironment
Opis:
Phymatellid demosponges are common fossils in the Campanian deposits of central Europe. In Poland, the Campanian phymatellids were known mostly from the opoka facies of the Miechów Synclinorium (southern Poland), where they occur mainly in the characteristic horizons of siliceous nodules in the lower Campanian opoka succession. Similarly preserved early Campanian phymatellids were identified in a redeposited lithistid assemblage in the Neogene gravels, exposed in the Bełchatów Lignite Mine (Mogilno-Łódź Synclinorium, central Poland). Rare phymatellids were noted for the first time in the upper Campanian gaize of the Miechów Synclinorium. The taxonomic descriptions of 16 phymatellid species presented here, including one new species, Kalpinella fragilis, completes existing knowledge of the taxonomic diversity of these sponges in the Late Cretaceous basins of central Europe. The present study also supplements the data on the stratigraphic ranges and spatial distribution of these species. The palaeoecology of Cretaceous phymatellids is discussed on the basis of their occurrence in the various facies.
Źródło:
Annales Societatis Geologorum Poloniae; 2023, 93, 3; 269--304
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Palaeoenvironmental reconstruction of the Upper Visean Paprotnia Beds (Bardo Unit, Polish Sudetes) using ichnological and palaeontological data
Autorzy:
Muszer, J.
Uglik, M.
Powiązania:
https://bibliotekanauki.pl/articles/2060590.pdf
Data publikacji:
2013
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
palaeoenvironment
taphoceonoses
trace fossils
ichnoassociations
Upper Visean
Sudetes
Opis:
In this paper the trace fossil associations and the taphocoenoses from the Upper Visean Paprotnia Beds (Bardo Unit) have been compared. Eleven ichnogenera have been recognized (Zoophycos, Chondrites, Protovirgularia, Lockeia, Palaeophycus, Nereites, Planolites, Altichnus, Paleobuprestis, cf. Thalassinoides and ?daedaloid form). A new ichnospecies Paleobuprestis sudeticus has been defined herein. It is the oldest wood-boring trace fossil observed in macroscale and the first wood-boring trace fossil preserved on the archaeocalamites stems. Based on ichnodiversity and relative abundance of trace fossils in the investigated strata three ichnoassociations have been distinguished: Zoophycos–Chondrites–Palaeophycus, Palaeophycus–Nereites and Paleobuprestis. Vertical succession of both the taphocoenoses and ichnoassociations reflects the different colonization stages of the substrate and is linked to bathymetric changes in the marine basin from offshore to nearshore conditions in warm climate at low latitude. The Paprotnia profile is a unique record of the Asbian–Brigantian transition.
Źródło:
Geological Quarterly; 2013, 57, 3; 365--384
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 72

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