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Wyszukujesz frazę "ecostratigraphy" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
A framework of ichthyofaunal ecostratigraphy of the Oligocene-Early Miocene strata of the Polish Outer Carpathian basin
Podstawy ekostratygrafii ichtiofaunistycznej osadów oligocenu-wczesnego miocenu basenu zewnętrznych Karpat Polskich
Autorzy:
Kotlarczyk, J.
Jerzmańska, A.
Świdnicka, E.
Wiszniowska, T.
Powiązania:
https://bibliotekanauki.pl/articles/191627.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
fossil fish collection
Teleostei
deep-sea sediments
lithostratigraphy
biostratigraphy
fish ecoassemblages
models of changes
ichthyofaunal zonation
ecostratigraphy
Oligocene
Early Miocene
Outer Carpathians
Polska
Opis:
The paper presents the results of an analysis of ichthyofaunal variability throughout the section of the Menilite-Krosno Series (MKS) in the Outer Carpathians of Poland. The studied tanathocoenoses were formed at the bottom of a more than 2,000 m deep northern basin of the Tethys, being largely represented by the continental rise and bottoms of its narrow furrows, and - to a lesser degree - the continental slope and slopes of a submarine high. Lateral variability of statististically representative assemblages of tanathocoenoses hosted in thin, isochro- nous horizons is interpreted as a result of both local changes of ichthyocoenoses and the influence of post-mortem relocation of fishes that mainly dwelled the shelf and upper continental slope. Vertical variability, in turn, is considered as a resulting from changeable conditions of the ecological environment, the input and outflow of taxa whose evolution proceeded in the Indo-Pacific area, and the species extinction. Changeability of ichthyofauna within a ca. 16-m.y.-long interval made it possible to document and formally describe 9 zones and 4 subzones of ichthyofauna of ecostratigraphic character. These zones comprise index, representative and accompanying taxa that belong to different ecological groups. Conceptual models of the origin of ichthyofaunal assemblages of individual zones are presented. It is suggested that the origin of assemblage differentiation resulted from the appearance and disappearance of the oxygen minimum zone in the water column, global and local sea level changes, topography of the basin bottom, as well as final basin infilling by sediments of submarine fans. The described and preserved collection of fossil Carpathian fishes, housed at the Department of Palaeozoology of the University of Wrocław, requires further specialized palaeontological studies in order to reconstruct a more complete composition of the Oligocene-Early Miocene ichthyofauna.
Źródło:
Annales Societatis Geologorum Poloniae; 2006, 76, No 1; 1-111
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The significance of subfossil Cladocera in stratigraphy of Late Glacial and Holocene
Autorzy:
Szeroczyńska, Krystyna
Powiązania:
https://bibliotekanauki.pl/articles/2027068.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stratigraphy
“ecostratigraphy” – biostratigraphy
climate
lakes
lacustrine sediments
subfossil Cladocera
Opis:
This pa per pres ents dis cus sion on the re sults of sub fos sil Cla do cera analy ses from five lakes in Po land (Przedni Staw Lake, Per es pilno Lake, Gooeci¹¿ Lake, Imio³ki- fossil lake and Os trow ite Lake). The Cla do cera are rep re sented in sediments by re mains of plank tonic (Bos mini dae, Daph ni dae) and lit to ral (Chy do ri dae) forms. Cla do ceran as sem blage phases (“ecos tra tigra phy”) were de ter mined on the ba sis of changes in domi nance of in di ca tor spe cies and past ecologi cal con di tions were re con structed. The re sults are be ing dis cussed from the view point of cli mate change and anthro po genic ac tiv ity and their role in the lake evo lu tion. Moreo ver, an at tempt to use the cla do ceran phases for stra tigraphic di vi sion of the Late Gla cial and Holo cene was made. Dur ing the Bøl ling/Al lerød in ter sta dial, dis tin guished on the ba sis of pol len analy sis, Cla do cera in di cated short phase of bad con di tion (dry or cold?), proba bly as the Old Dryas cli mate re sults. The be gin ning of Holo cene is char ac ter ized, in moun tain and low land lakes, by high in -crease in the number of spe cies and speci mens of Cla do cera. This de scribed clear warm ing and marked the bound ary Late Gla cial/Holo cene. It was in di cated that the “ecos tra tigra phy” based on Cla do cera can be use ful for cli ma to stratigra phy, if cli mate was the ma jor fac tor con trol ling the de vel op ment of fresh wa ter lakes.
Źródło:
Studia Quaternaria; 2006, 23; 37-45
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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