1,687 research outputs found
Survival Vocabulary of Wuna Language in Plant Environment of Kowala
This article is taken from the results of a study entitled "Survival Vocabulary of Wuna Language in Plant Environment of Kowala ". The purpose of a study is to describe and analyze the survival vocabulary of Wuna Language in the plant environment kowala. The method used the field method. In presenting the data used quantitative descriptive method and data analysis used in the study method. Based on the analysis of data, amongst the 200 vocabularies submitted to 50 respondents, showed that most of the vocabulary in the plant environment kowala still significant in surviving. Plant kowala still closely related to community\u27s lives in the areas of social, economic, moral ethics and faith. Furthermore, community attitudes toward kowala plants still appreciate it. This can be showed by their attitude to let the plants of kowala grow anywhere, as shown in community\u27s gardens, in the middle of the plant teak, guava or anywhere without any interference from the community
Gamma-ray spectrometry across the Upper Devonian basin succession at Kowala in the Holy Cross Mountains (Poland)
The Upper Devonian sequence at Kowala in the Holy Cross Mountains was logged using gamma-ray spectrometry,
for investigating the changes of oxygenation level in the Late Devonian basin. The Th/U ratio indicates that oxygen
levels were low throughout the Late Frasnian interval, with low peaks during the Kellwasser Events showing anoxic
conditions in the basin. The F-F boundary interval was also oxygen deficient, but there may have been a brief reoxygenation
at the boundary itself. By the Famennian crepida Zone, the basin gradually began to reoxygenate, but in the
trachytera Zone another anoxic event, the Annulata Event occurred, causing a bloom rather than extinction of specially
adapted taxa such as Guerichia. Thus the gamma-ray spectrometry data suggests that basinal anoxia prevailed
through much of the Late Frasnian. The F-F extinction might have been the result of prolonged stresses imposed on
the ecosystem, particularly during the euxinic Upper Kellwasser Event
Extent and duration of marine anoxia during the Frasnian– Famennian (Late Devonian) mass extinction in Poland, Germany, Austria and France
Abstract – The intensity and extent of anoxia during the two Kellwasser anoxic events has been
investigated in a range of European localities using amultidisciplinary approach (pyrite framboid assay,
gamma-ray spectrometry and sediment fabric analysis). The results reveal that the development of the
Lower Kellwasser Horizon in the early Late rhenana Zone (Frasnian Stage) in German type sections
does not always coincide with anoxic events elsewhere in Europe and, in some locations, seafloor
oxygenation improves during this interval. Thus, this anoxic event is not universally developed. In
contrast, the Upper Kellwasser Horizon, developed in the Late linguiformis Zone (Frasnian Stage) in
Germany correlates with a European-wide anoxic event that is manifest as an intensification of anoxia
in basinal locations to the point that stable euxinic conditionswere developed (for example, in the basins
of the Holy Cross Mountains, Poland). The interval also saw the spread of dysoxic waters into very
shallow water (for instance, reefal) locations, and it seems reasonable to link the contemporaneous
demise of many marine taxa to this phase of intense and widespread anoxia. In basinal locations,
euxinic conditions persisted into the earliest Famennian with little change of depositional conditions.
Only in the continental margin location of Austria was anoxia not developed at any time in the Late
Devonian. Consequently it appears that the Upper Kellwasser anoxic event was an epicontinental
seaway phenomenon, caused by the upward expansion of anoxia from deep basinal locales rather than
an ‘oceanic’ anoxic event that has spilled laterally into epicontinental settings
Gamma-ray spectrometry across the Upper Devonian basin succession at Kowala in the Holy Cross Mountains (Poland)
The Upper Devonian sequence at Kowala in the Holy Cross Mountains was logged using gamma-ray spectrometry,
for investigating the changes of oxygenation level in the Late Devonian basin. The Th/U ratio indicates that oxygen
levels were low throughout the Late Frasnian interval, with low peaks during the Kellwasser Events showing anoxic
conditions in the basin. The F-F boundary interval was also oxygen deficient, but there may have been a brief reoxygenation
at the boundary itself. By the Famennian crepida Zone, the basin gradually began to reoxygenate, but in the
trachytera Zone another anoxic event, the Annulata Event occurred, causing a bloom rather than extinction of specially
adapted taxa such as Guerichia. Thus the gamma-ray spectrometry data suggests that basinal anoxia prevailed
through much of the Late Frasnian. The F-F extinction might have been the result of prolonged stresses imposed on
the ecosystem, particularly during the euxinic Upper Kellwasser Event
The fate of the homoctenids (Tentaculitoidea) during the Frasnian-Famennian mass extinction (Late Devonian)
The homoctenids (Tentaculitoidea) are small, conical-shelled marine animals which are amongst the most abundant and widespread of all Late Devonian fossils. They were a principal casualty of the Frasnian-Famennian (F-F, Late Devonian) mass extinction, and thus provide an insight into the extinction dynamics. Despite their abundance during the Late Devonian, they have been largely neglected by extinction studies. A number of Frasnian-Famennian boundary sections have been studied, in Poland, Germany, France, and the United States. These sections have yielded homoctenids, which allow precise recognition of the timing of the mass extinction. It is clear that the homoctenids almost disappear from the fossil record during the latest Frasnian “Upper Kellwasser Event”. The coincident extinction of this pelagic group, and the widespread development of intense marine anoxia within the water column, provides a causal link between anoxia and the F-F extinction. Most notable is the sudden demise of a group, which had been present in rock-forming densities, during this anoxic event. One new species, belonging to Homoctenus is described, but is not formally named here
The role of sea-level change and marine anoxia in the Frasnian-Famennian (Late Devonian) mass extinction
Johnson et al. (Johnson, J.G., Klapper, G., Sandberg, C.A., 1985. Devonian eustatic fluctuations in Euramerica. Geological Society of America Bulletin 96, 567–587) proposed one of the first explicit links between marine anoxia, transgression and mass extinction for the Frasnian–Famennian (F–F, Late Devonian) mass extinction. This cause-and-effect nexus has been accepted by many but others prefer sea-level fall and cooling as an extinction mechanism. New facies analysis of sections in the USA and Europe (France, Germany, Poland), and comparison with sections known from the literature in Canada, Australia and China reveal several high-frequency relative sea-level changes in the late Frasnian to earliest Famennian extinction interval. A clear signal of major transgression is seen within the Early rhenana Zone (e.g. drowning of the carbonate platform in the western United States). This is the base of transgressive–regressive Cycle IId of the Johnson et al. (Johnson, J.G., Klapper, G., Sandberg, C.A., 1985. Devonian eustatic fluctuations in Euramerica. Geological Society of America Bulletin 96, 567–587) eustatic curve. This was curtailed by regression and sequence boundary generation within the early linguiformis Zone, recorded by hardground and karstification surfaces in sections from Canada to Australia. This major eustatic fall probably terminated platform carbonate deposition over wide areas, especially in western North America. The subsequent transgression in the later linguiformis Zone, recorded by the widespread development of organic-rich shale facies, is also significant because it is associated with the expansion of anoxic deposition, known as the Upper Kellwasser Event. Johnson et al.'s (Johnson, J.G., Klapper, G., Sandberg, C.A., 1985. Devonian eustatic fluctuations in Euramerica. Geological Society of America Bulletin 96, 567–587) original transgression-anoxia–extinction link is thus supported, although some extinction losses of platform carbonate biota during the preceeding regression cannot be ruled out. Conodont faunas suffered major losses during the Upper Kellwasser Event, with deep-water taxa notably affected. This renders unreliable any eustatic analyses utilising changes in conodont biofacies. Claims for a latest Frasnian regression are not supported, and probably reflect poor biostratigraphic dating of the early linguiformis Zone sequence boundary
Geochemical and ecological aspects of lower Frasnian pyrite-ammonoid level at Kostomłoty (Holy Cross Mountains, Poland)
The lower Frasnian (transitans Zone with Ancyrodella priamosica = MN 4 Zone) rhythmic basin succession of marly limestones and
shales (upper Szydlówek Beds) at Kostomloty, western Holy CrossMts., Central Poland, contains a record of the transgressive-hypoxic
Timan Event in this drowned part of southern Laurussian shelf. The unique facies consists of organic-rich marly shales and a distinctive
pyritic, goniatite level, 1.6m thick. The faunal assemblage is dominated by pyritized shells of diminutivemollusks with cephalopods (including
goniatites Epitornoceras and Acanthoclymenia), buchioline bivalves (Glyptohallicardia) and styliolinids. This interval is
marked by moderately low Th/U ratios and pyrite framboid size distributions suggestive of dysoxic rather than permanent euxinic conditions.
The scarcity of infauna and bioturbation resulted in finely laminated sedimentary fabrics, as well as the low diversity of the presumed
pioneer benthos (mostly brachiopods). In the topmost part of the Szydlówek Beds, distinguished by the Styliolina coquina
interbedded between limestone-biodetrital layers, the above geochemical proxies and C-isotope positive shift indicate a tendency to
somewhat increased bottom oxygen deficiency and higher carbon burial rate linked with a bloom of pelagic biota during high-productivity
pulse. The geochemical and community changes are a complex regional record of the initial phase of a major perturbation in the
earth-ocean system during a phase of intermittently rising sea level in the early to middle Frasnian, and associated with the highest positive
C-isotope ratios of the Devonian
New constraints on the Middle Palaeozoic to enozoic burial and hermal history of the Holy ross Mts. (Central Poland) : results of numerical modelling
A 1-D burial-thermal modelling was performed using data from two borehole sections representative of the central part of the Holy Cross Mts. area. This area is located in the axial part of the Permian-Mesozoic Mid-Polish Trough that was inverted during the latest Cretaceous-Paleocene. The modelling involved different variants of restored stratigraphy of eroded Carboniferous to Cretaceous strata, whereas calibration was based on samples from cored Middle-Upper Devonian sediments. The modelling results are consistent with the assumption of a Variscan (Carboniferous-Early Permian) heat flow elevated up to 80 mWm-2, which is further confirmed by independent regional evidence. The zone of increased thermal maturity in the Devonian may be partly accounted for by a thicker Carboniferous section (by ca. 500 m) compared to previous estimates. Two variants of the post-Carboniferous geohistory were analysed. The variant of a thinner Permian-Mesozoic section, implying lower magnitude of the Late Cretaceous-Paleogene inversion, allows more realistic assumptions regarding heat flow distribution through time, including the possibility to incorporate an elevated Variscan heat flow. The alternative scenario, assuming deeper burial, generally lower heat flow and smaller Carboniferous thickness, is regarded as less probable. The accepted variant of the Permian-Mesozoic burial history implies that the total post-Carboniferous burial in the study area was on the order of 2000-2500 metres rather than 3000-3500 metres. The respective Upper Cretaceous thickness could have been 400 to 500 m instead of ca. 1000 m, whereas the Late Cretaceous Paleogene inversion more likely started in the Santonian than in the late Maastrichtian. Consequently, the preferred magnitude of total inversion was on the order of 2500 m
New constraints on the Middle Palaeozoic to Cenozoic burial and thermal history of the Holy Cross Mts. (Central Poland): results from numerical modelling
A 1-D burial-thermal modelling was performed using data from two borehole sections representative of the central
part of the Holy Cross Mts. area. This area is located in the axial part of the Permian-Mesozoic Mid-Polish Trough
that was inverted during the latest Cretaceous-Paleocene. The modelling involved different variants of restored stratigraphy of eroded Carboniferous to Cretaceous strata, whereas calibration was based on samples from cored Middle-Upper Devonian sediments. The modelling results are consistent with the assumption of a Variscan (Carboniferous-Early Permian) heat flow elevated up to 80 mWm-2, which is further confirmed by independent regional evidence. The zone of increased thermal maturity in the Devonian may be partly accounted for by a thicker Carboniferous section (by ca. 500 m) compared to previous estimates. Two variants of the post-Carboniferous geohistory were analysed. The variant of a thinner Permian-Mesozoic section, implying lower magnitude of the Late Cretaceous-Paleogene inversion, allows more realistic assumptions regarding heat flow distribution through time, including the possibility to incorporate an elevated Variscan heat flow. The alternative scenario, assuming deeper burial, generally lower heat flow and smaller Carboniferous thickness, is regarded as less probable. The accepted variant of the Permian-Mesozoic burial history implies that the total post-Carboniferous burial in the study area was on the order of 2000-2500 metres rather than 3000-3500 metres. The respective Upper Cretaceous thickness could have been 400 to 500 m instead of ca. 1000 m, whereas the Late Cretaceous-Paleogene inversion more likely started in the Santonian than in the late Maastrichtian. Consequently, the preferred magnitude of total inversion was on the order of 2500 m
The first Devonian holocephalian tooth from Poland
A recently found "bradyodont" holocephalian tooth from bituminous shales of the Kowala Quarry, south-western Holy Cross Mountains, Poland, dated as the middle Famennian Palmatolepis trachytera conodont Zone, is described. In spite of its resemblance to the forms often attributed to Helodus, the tooth is referred to as Psephodus cf. magnus (Agassiz, 1838), and supposed to represent the anterior part of the dentition, based on a partly articulated specimen of Psephodus from the Carboniferous of Scotland. The analysis of early helodonts and psephodonts, and other Famennián chondrichthyan crushing teeth, shows numerous similarities in tooth-base structure, such as the reduction of lingual basal extension, loss of articulation devices, development of numerous nutritive foramina, and the tendency to fusion between the teeth in a tooth-family. Based on these shared characters, close phylogenetic relationships between the Protacrodontoidea, Hybodontoidea, and the Holocephali are postulated
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