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    Wyświetlanie 1-9 z 9
    Tytuł:
    Environmental differentiation reflected in the vertebrate fauna diversity in the Lower Devonian of the Holy Cross Mountains, Poland
    Autorzy:
    Wilk, Olga
    Szrek, Piotr
    Ginter, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/2201204.pdf
    Data publikacji:
    2022
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    vertebrates
    Lower Devonian
    Emsian
    Holy Cross Mountains
    environment
    Opis:
    The Lower Devonian of the Holy Cross Mountains is well-known in the field of vertebrate palaeontology but remains unrecognized as regards palaeoenvironmental reconstructions. We therefore analysed the spatial distribution and relative abundance of fossil vertebrates in this area within one time interval. The fauna from an Early Devonian (Emsian) siliciclastic bone-bearing breccia (the “Placoderm Sandstone”) exposed in four sections of the Łysogóry region and five sections of the Kielce region was analysed with respect to the frequency of the remains and their taxonomic affinity. The relative abundances of agnathans, acanthodians, placoderms, osteichthyans and chondrichthyans suggest more open marine conditions in the Łysogóry region and more terrestrial-influenced in the Kielce region during the Emsian. The results show that the average agnathan and acanthodian content of the Łysogóry region is significantly larger than that in the Kielce region. On the other hand, there are relatively fewer osteichthyans in the Łysogóry region and a significantly higher proportion of bony fishes was recorded in the fauna of the Kielce region. Placoderms are characterized by their generally similar frequency in both regions and from site to site in each of them, though a greater abundance was noted from the Kielce region. Likewise differences in the proportions of particular groups in the Kielce region suggest a large variety of marginal-marine environments under the influence of factors that might have included marine currents and variable conditions around a river mouth.
    Źródło:
    Geological Quarterly; 2022, 66, 4; art. 66, no. 35
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Storm origin of bone-bearing beds in the Lower Devonian placoderm sandstone from Podłazie Hill (Holy Cross Mountains, central Poland)
    Autorzy:
    Szrek, P.
    Niedźwiedzki, G.
    Dec, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060466.pdf
    Data publikacji:
    2014
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Placoderm Sandstone
    Lower Devonian
    Emsian
    Holy Cross Mountains
    Polska
    Opis:
    The placoderm sandstone (Emsian, Holy Cross Mountains) exposed in the abandoned quarry at Podłazie Hill was revisited and excavated during fieldwork conducted in 2011-2013. Bone-bearing breccias were identified for the first time at this site and subjected to taphonomic analysis. Vertebrate remains are dominated by heterostracans, while true placoderms compose less than 20% of the total vertebrate assemblage. The high degree of fragmentation of the bones and low degree of abrasion indicate that the remains were reworked and transported before final burial. This is consistent with the mixed character of the bone accumulations, which comprise both open-shelf forms (acanthodians, chondrichthyans) as well as those related to marginal-marine environments (placoderms and sarcopterygians). The bone-bearing succession has been subdivided into five depositional facies attributed to a coastal lagoon influenced by stormy, possibly tidal conditions. The occurrence of the invertebrate trace fossil Ilmenichnus sp. accompanied by Lockeia and Monomorphichnus supports this interpretation.
    Źródło:
    Geological Quarterly; 2014, 58, 4; 795--806
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Palinologia dolnodewońskich i środkowodewońskich osadów klastycznych z otworu wiertniczego Trojanowice 2
    Palynology of the Lower and Middle Devonian clastic rocks from the Trojanowice 2 borehole (Southern Poland)
    Autorzy:
    Filipiak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2061881.pdf
    Data publikacji:
    2014
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    palinofacje
    miospory
    dewon
    ems
    eifel
    palinostratygrafia
    palynostratigraphy
    palynofacies
    miospores
    Devonian
    Emsian
    Eifelian
    Opis:
    Kompleksowe badania palinologiczne przeprowadzono na 37 próbkach z otworu wiertniczego Trojanowice 2, z interwału 502,0–558,8 m. Na podstawie rozpoznanych gatunków miospor wyróżniono dwa standardowe poziomy miosporowe: Emphanisporites annulatus-Camarozonotriletes sextantii z emsu oraz Grandispora douglastownense-Ancyrospora eurypterota z pogranicza emsu i eiflu. Przeprowadzone anlizy palinofacjlne pozwoliły określić środowisko sedymentacji spągowych partii profilu na morskie, bliskiego brzegu, z intensywną dostawą materiału organicznego z lądu.W części stropowej stwierdzono natomiast nieco głębsze warunki depozycji, w większym oddaleniu od obszarów źródłowych. Analiza kolorystyczna wykazała dojrzały stopień przeobrażenia termicznego materii organicznej. Formalnie opisano po raz pierwszy dwa nowe gatunki miospor: Camptozonotriletes reticulum sp.n. i Perotrilites asymmetricus sp.n.
    The palynological investigation were carried out on 37 samples from the Trojanowice 2 borehole from a depth interval of 502.0–558.8 m. Based on the presence of index and important microflora species two standard miospore zones were recognized: Emphanisporites annulatus-Camarozonotriletes sextantii, from the Emsian and Grandispora douglastownense-Ancyrospora eurypterota from the Emsian/ Eifelian transition interval. Palynofacies from the lower part of the section indicate marginal marine palaeoenvironmental conditions. Palynofacies from the upper part prove deeper marine conditions further from the shoreline. Additionally, spore colour analyses revealed a high degree of thermal transformation. Two new miospore taxa have been formally erected: Camptozonotriletes reticulum sp.n. and Perotrilites asymmetricus sp.n.
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2014, 459; 7--31
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acanthodians from the Lower Devonian (Emsian) ‘Placoderm Sandstone’, Holy Cross Mountains, Poland
    Autorzy:
    Burrow, C. J.
    Szrek, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/139217.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Acanthodii
    Machaeracanthus
    Striacanthus
    Onchus
    Emsian
    Lower Devonian
    Polska
    fałdopłetwe
    akantody
    ems
    dewon dolny
    Polska
    Opis:
    The Lower Devonian ‘Placoderm Sandstone’ in the Holy Cross Mountains (HCM) is filled with abundant impressions of disarticulated vertebrate remains. The only acanthodian macroremains named to date are fin spines of Machaeracanthus polonicus Gürich. Fin spine impressions in slabs from the Winna Formation (Emsian) at Podłazie Hill (near Daleszyce) in the southern HCM, and also the Barcza Formation (?Lochkovian) at Barcza Quarry, Miedziana Góra Conglomerate (?Lochkovian), Gruchawka, and Zagórze Formation (middle–upper Emsian) at Bukowa Mountain in the northern HCM, reposited in the University of Warsaw, Polish Geological Institute-National Research Institute, Warsaw, and Natural History Museum, London collections, have been cast and studied in order to better document this poorly known taxon. As noted in other Machaeracanthus species, we have found that M. polonicus has two different morphotypes of spines, which abut lengthwise to form a pair of spines. Our investigations show that the fin spine assemblage includes Onchus overathensis as well as M. polonicus, and probably another undetermined acanthodian. The affinities of O. overathensis are reassessed. It is here considered to be a diplacanthiform, and reassigned to the genus Striacanthus, as S. overathensis. Acanthodian scapulocoracoids have also been identified, as well as tightly spiralled toothwhorls which could be from an acanthodian.
    Źródło:
    Acta Geologica Polonica; 2018, 68, 3; 307-320
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    From carbonate platform to euxinic sea – the collapse of an Early/Middle Devonian reef, Cantabrian Mountains (Spain)
    Autorzy:
    van Loevezijn, G. B. S.
    Raven, J. G. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/94474.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    Anoxia
    Basal Choteč Event
    Cantabria
    carbon isotopes
    Eifelian
    Emsian
    anoksja
    Kantabria
    izotopy węgla
    eifel
    ems
    Opis:
    The Santa Lucía Formation represents the major phase in Devonian reef development of the Cantabrian Zone (Cantabrian Mountains, northwest Spain). In the present study the transition from the carbonate platform deposits of the Santa Lucía Formation to the overlying euxinic basinal deposits of the Huergas Formation is described. These transitional strata are connected to the Basal Choteč Event and represent a condensed sedimentation of micritic dark-grey and black limestones with an upward increase of dark shale intercalations with iron mineralisation surfaces and storm-induced brachiopod coquinas. The transitional beds are grouped into a new unit, the Cabornera Bed, which consists of lime-stone, limestone-shale and shale facies associations, representing a sediment-starved euxinic offshore area just below the storm wave base. Four stages in reef decline can be recognised: a reef stage, an oxygen-depleted, nutrient-rich stage, a siliciclastic-influx stage and a pelagic-siliciclastic stage. Additional geochemical and geophysical investigations are needed to verify the results presented herein.
    Źródło:
    Geologos; 2017, 23, 3; 143--161
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lower Devonian [Emisian] rugose corals from the Cantabrian Mountains, Northern Spain
    Autorzy:
    Schroder, S
    Soto, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/21027.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    ecology
    Cantabriastraea cantabrica
    Rugosa
    Devonian
    Lower Devonian
    Tabulophyllum bonarense
    rugose coral
    Emsian
    coral
    paleontology
    Spain
    Cantabrian Mountains
    Opis:
    Two species of Lower Devonian rugose corals are described from the Cantabrian Mountains of Spain: Cantabriastraea cantabrica gen. et sp. nov. and Tabulophyllum bonarense sp. nov. The development of rootor buffer−like attachment structures (“rhizoid processes”) in T. bonarense indicates adaption to the soft substrate and supports corallite stabilisation. Because of their strongly everted calices and a corresponding arrangement of trabeculae, the colonies of the genus Cantabriastraea are assigned tentatively to the Paradisphyllinae, constituting the first record of the subfamily in Western Europe. Some specimens give information on colony−formation of this taxon, which is induced by strong lateral budding (nonparricidal increase) of a remarkable large and long−lasting protocorallite.
    Źródło:
    Acta Palaeontologica Polonica; 2003, 48, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ontogenetic and intraspecific variation in the late Emsian – Eifelian (Devonian) conodonts Polygnathus serotinus and P. bultyncki in the Prague Basin (Czech Republic) and Nevada (western U.S.)
    Autorzy:
    Klapper, G.
    Vodrážková, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/138667.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Devonian
    Emsian-Eifelian conodont zonation
    ontogenetic and intraspecific variation
    taxonomic revision
    dewon
    ontogeneza
    zmiana wewnątrzgatunkowa
    rewizja taksonomiczna
    Opis:
    Samples from populations of Polygnathus serotinus Telford 1975 and P. bultyncki Weddige 1977 from the Prague Basin and Nevada display normal variation for Devonian conodont species. A considerable number of previous authors, however, have proposed unnecessary synonyms of these two species, primarily because they have not recognized ontogenetic variation. In contrast, we interpret the variation as ontogenetic as well as intraspecific and present detailed synonymies as a result. A third species, P. praetrigonicus Bardashev 1992, which has been carried in open nomenclature for many years, is an important indicator of the basal costatus Zone in the Prague Basin, New York, and Nevada. We review the stratigraphic distribution of these three species and the conodont zonation across the Emsian-Eifelian (Lower-Middle Devonian) boundary. Polygnathus pseudocostatus sp. nov. (partitus-costatus zones, central Nevada) is described herein. We have observed a decrease in the pit size during ontogeny in P. bultyncki although we have not observed enough specimens to rule out intraspecific versus ontogenetic variation.
    Źródło:
    Acta Geologica Polonica; 2013, 63, 2; 153-174
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soft-tissue attachments in orthocerid and bactritid cephalopods from the Early and Middle Devonian of Germany and Morocco
    Autorzy:
    Kroger, B
    Klug, C.
    Mapes, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/20326.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Cephalopoda
    Germany
    Orthocerida
    Emsian
    Morocco
    Middle Devonian
    soft tissue attachment
    Early Devonian
    Bactritida
    muscle scar
    Eifelian
    Devonian
    cephalopod
    paleontology
    Opis:
    In the Early to Middle Devonian shale sequences of Germany and Morocco, pyritised and secondarily limonitised cephalopod remains are common. Details of the soft−tissue attachment structures are sometimes preserved on the internal moulds of the body chamber and phragmocone of these cephalopods. Some of the studied Orthocerida show a very faint annular elevation and a dorsal furrow. A few Bactritida show a distinctive annular elevation with two circular bands. The bands form a paired or threefold lobe at the dorsum of the shell. Morphological differences between Orthocerida and Bactritida suggest different soft part morphologies. A comparison of the attachment scars shows that the Bactritida are intermediate between the Orthocerida and ammonoids with regard to their muscle attachment scars. The shape of the muscle scars are interpreted as indication for a planktonic lifestyle in Orthocerida and a comparatively active, nektonic lifestyle in Bactritida and ammonoids. The new genus Acanthomichelinoceras is erected. Acanthomichelinoceras commutatum, Cycloceras sp., Bactrites gracile, Bactrites sp. A, Bactrites sp. B, and Bactrites sp. C are described.
    Źródło:
    Acta Palaeontologica Polonica; 2005, 50, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monospecific rugosan assemblage from the Emsian hydrothermal vents of Morocco
    Autorzy:
    Berkowski, B
    Powiązania:
    https://bibliotekanauki.pl/articles/20879.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    hydrothermal venting system
    sediment
    Emsian
    Morocco
    venting channel
    Rugose coral
    rugosa
    Hamarophyllum belkai
    mud mound
    hydrothermal vent
    coral
    paleontology
    coral meadow
    Opis:
    Unique monospecific assemblages of small, solitary, nondissepimented rugose corals from the Devonian deep−sea hydrothermal venting systems of the Hamar Laghdad (Anti−Atlas, Morocco) are described. Assemblages of numerous rugosans (coral meadows) have been found around the outlets of venting channels irregularly forked within the Emsian mud mound sediments. The majority of rugose corals, which settled around vents, reveal a bizarre pattern of growth called here “calice−in calice”. The phenomenon of “calice−in−calice” growth is related to selective survival of coral larvae i.e. it is postulated that the larvae, which settled within the calices of dead individuals were more successful in their development than those that settled elsewhere. They probably use empty calices as shelters against the physical (hot or poisoning fluids) or biological (predators) factors. The empty calices also provided a hard surface for attachment. The presence of numerous carapaces of ostracods within the calices of dead rugosans suggests a strong trophic relation between corals and ostracods, which lived around hydrothermal vents. The new genus and species Hamarophyllum belkai is proposed.
    Źródło:
    Acta Palaeontologica Polonica; 2004, 49, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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