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    Wyświetlanie 1-4 z 4
    Tytuł:
    Stromatoporoid morphology in the Devonian of the Holy Cross Mountains, Poland
    Morfplogia stromatoporoidow z dewonu Gor Swietokrzyskich
    Autorzy:
    Luczynski, P
    Powiązania:
    https://bibliotekanauki.pl/articles/23000.pdf
    Data publikacji:
    1998
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    fauna kopalna
    gorny dewon
    ksztalt
    osady kopca mulowego
    kopce mulowe
    stromatoporoidy
    Polska
    Gory Swietokrzyskie
    wapienie stromatoporoidowo-koralowcowe
    latylaminy
    kopce rafowe
    morfologia
    dynamika wod
    paleontologia
    dewon
    kamieniolomy
    Opis:
    Stromatoporoids have been measured in three Upper Devonian localities in the Holy Cross Mountains: Karwów, Kadzielnia and Sitkówka-Kowala quaries. Quantitative analysis of the measurements demonstrated several differences, that have been interpreted in terms of ecological variations between the localities. Rate of deposition is proposed to be of special importance in controlling the stromatoporoid morphology. Deposits exposed in Kadzielnia and Karwów quarries represent an environment with periodically accelerating deposition and water turbidity, where low domical individuals with a ragged surface and non-enveloping arrangement of latilaminae constitute the most numerous group of stromatoporoids. The deposits outcropping in Sitkówka-Kowala quarry, formed in a calm setting with low deposition rate, are charactenzed by following stromatoporoid features: usually extended domical or bulbous shape, smooth surface and an enveloping arrangement of latilaminae. The similarity of stomatoporoid assemblages from Karwów and Kadzielnia confirmed, that dolomites exposed in the Karwów quarry represent Kadzielnia-type reef-mound deposits.
    Przeprowadzona ilościowa analiza pomiarów wykazała wiele różnic pomiędzy poszczęgólnymi stanowiskami, które zostały zinterpretowane w świetle zmienności panujących warunków paleoekologicznych. Za czynniki szczególnie silnie wpływające na morfomeryczne cechy stromatoporoidów zostały uznane tempo depozycji i dynamika wód. Nieuławicone wapienie stromatoporoidowo-koralowcowe odsłanianjące się w Karwowie i Kadzielni reprezenfują fację kopców rafowych powstających w środowisku o okresowo wzrastających tempie depozycji i dynamice wód. Zespół stromatoporoidów jest tu zdominowany przez osobniki niskokopułowe o postrzępionej powierzchni i i nieoblekającym ułożeniu latylamin. Skały odsłaniające się w kamieniołomie Sitkówka-Kowala reprezentują płytkowodne facje powstające w środowisku ławicy. Tam, w spokojnych wodach i przy niskim tempie depozycji, charakterystycznymi cechami stromatoporoidów były: kształt bardzo wysokokopułowy bądź bulwiasty, gładka powierzchnia i oblekające ułożenie latylamin. Podobieństwo zespołów stromatoporoidów z Karwowa i z Kadzielni potwierdza tezę, że dolomity odsłaniające się w kamieniołomie w Karwowie reptezentują osady kopca mutowego typu kadzielniańskiego.
    Źródło:
    Acta Palaeontologica Polonica; 1998, 43, 4; 653-663
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interrelations between stromatoporoid morphometric features - a quantitative approach based on specimens from the Silurian of Podolia (Ukraine) and the Devonian of the Holy Cross Mountains (Poland)
    Autorzy:
    Łuczyński, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/1835590.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    stromatoporoids
    Morphometric features
    quantitative analysis
    palaeoenvironmental interpretation
    clogging
    Stromatoporoidy
    analiza ilościowa
    kolmatacja
    Opis:
    Morphometric attributes of 705 stromatoporoid specimens from a number of exposures from the Silurian of Podolia (Ukraine) and the Devonian of the Holy Cross Mountains (Poland), representing a wide array of shallow water carbonate sedimentary environments, have been analysed. Taken into account were such parameters as: general shape of the skeleton, shape of the final growth form (living surface profile), upper surface character, latilaminae arrangement, burial ratio and type of initial surface. A number of new ratios has been introduced, designed mainly to improve the mapping of the outlines of the stromatoporoids upper surfaces. All studied specimens were treated as belonging to one group, and relations between particular attributes were tested. The results were analysed in terms of potential environmental factors influencing stromatoporoid morphometric features. Most of the distinguished attributes are common in the studied group and occur in various combinations, with an important exception of parameters designed to reflect the shape of the skeleton’s upper surface, which are distinctly predominated by convex variants. This indicates that surface concavity was a highly undesired feature among stromatoporoids. Upper surface convexity is interpreted herein as a response to the hazard of clogging of the animals pores by tiny sediment particles suspended in the bottom turbid water layer. Common low burial ratios of final living surface profiles and the occurrence of specimens with a smooth upper surface but a non-enveloping latilaminae arrangement are other reflections of this phenomenon. Burial by sediments and redeposition were also important factors governing stromatoporoid development. No direct arguments indicating photosensitivity of stromatoporoids can be deduced from the presented results. The hitherto postulated allometric tendency among stromatoporoids of starting growth as laminar forms and later adopting consecutively higher profile shapes has not been confirmed here. On the contrary, a tendency for gradual elimination of very high profile forms with increasing stromatoporoid size has been observed. The final shape of a stromatoporoid skeleton was always an effect of a combination of various agents.
    Źródło:
    Acta Geologica Polonica; 2020, 70, 3; 311-337
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interrelations between stromatoporoid morphometric features - a quantitative approach based on specimens from the Silurian of Podolia (Ukraine) and the Devonian of the Holy Cross Mountains (Poland)
    Autorzy:
    Łuczyński, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/24024718.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    stromatoporoids
    morphometric features
    quantitative analysis
    palaeoenvironmental interpretation
    clogging
    stromatoporoidy
    morfometria
    analiza ilościowa
    interpretacja paleośrodowiskowa
    kolmatacja
    Opis:
    Morphometric attributes of 705 stromatoporoid specimens from a number of exposures from the Silurian of Podolia (Ukraine) and the Devonian of the Holy Cross Mountains (Poland), representing a wide array of shallow water carbonate sedimentary environments, have been analysed. Taken into account were such parameters as: general shape of the skeleton, shape of the final growth form (living surface profile), upper surface character, latilaminae arrangement, burial ratio and type of initial surface. A number of new ratios has been introduced, designed mainly to improve the mapping of the outlines of the stromatoporoids upper surfaces. All studied specimens were treated as belonging to one group, and relations between particular attributes were tested. The results were analysed in terms of potential environmental factors influencing stromatoporoid morphometric features. Most of the distinguished attributes are common in the studied group and occur in various combinations, with an important exception of parameters designed to reflect the shape of the skeleton’s upper surface, which are distinctly predominated by convex variants. This indicates that surface concavity was a highly undesired feature among stromatoporoids. Upper surface convexity is interpreted herein as a response to the hazard of clogging of the animals pores by tiny sediment particles suspended in the bottom turbid water layer. Common low burial ratios of final living surface profiles and the occurrence of specimens with a smooth upper surface but a non-enveloping latilaminae arrangement are other reflections of this phenomenon. Burial by sediments and redeposition were also important factors governing stromatoporoid development. No direct arguments indicating photosensitivity of stromatoporoids can be deduced from the presented results. The hitherto postulated allometric tendency among stromatoporoids of starting growth as laminar forms and later adopting consecutively higher profile shapes has not been confirmed here. On the contrary, a tendency for gradual elimination of very high profile forms with increasing stromatoporoid size has been observed. The final shape of a stromatoporoid skeleton was always an effect of a combination of various agents.
    Źródło:
    Acta Geologica Polonica; 2020, 70, 3; 311--337
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interrelations between stromatoporoid morphometric features - a quantitative approach based on specimens from the Silurian of Podolia (Ukraine) and the Devonian of the Holy Cross Mountains (Poland)
    Autorzy:
    Łuczyński, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/138828.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    stromatoporoids
    Morphometric features
    quantitative analysis
    palaeoenvironmental interpretation
    clogging
    Stromatoporoidy
    analiza ilościowa
    kolmatacja
    Opis:
    Morphometric attributes of 705 stromatoporoid specimens from a number of exposures from the Silurian of Podolia (Ukraine) and the Devonian of the Holy Cross Mountains (Poland), representing a wide array of shallow water carbonate sedimentary environments, have been analysed. Taken into account were such parameters as: general shape of the skeleton, shape of the final growth form (living surface profile), upper surface character, latilaminae arrangement, burial ratio and type of initial surface. A number of new ratios has been introduced, designed mainly to improve the mapping of the outlines of the stromatoporoids upper surfaces. All studied specimens were treated as belonging to one group, and relations between particular attributes were tested. The results were analysed in terms of potential environmental factors influencing stromatoporoid morphometric features. Most of the distinguished attributes are common in the studied group and occur in various combinations, with an important exception of parameters designed to reflect the shape of the skeleton’s upper surface, which are distinctly predominated by convex variants. This indicates that surface concavity was a highly undesired feature among stromatoporoids. Upper surface convexity is interpreted herein as a response to the hazard of clogging of the animals pores by tiny sediment particles suspended in the bottom turbid water layer. Common low burial ratios of final living surface profiles and the occurrence of specimens with a smooth upper surface but a non-enveloping latilaminae arrangement are other reflections of this phenomenon. Burial by sediments and redeposition were also important factors governing stromatoporoid development. No direct arguments indicating photosensitivity of stromatoporoids can be deduced from the presented results. The hitherto postulated allometric tendency among stromatoporoids of starting growth as laminar forms and later adopting consecutively higher profile shapes has not been confirmed here. On the contrary, a tendency for gradual elimination of very high profile forms with increasing stromatoporoid size has been observed. The final shape of a stromatoporoid skeleton was always an effect of a combination of various agents.
    Źródło:
    Acta Geologica Polonica; 2020, 70, 3; 311-337
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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