Paleoekologia i stratygrafia cechsztynu syneklizy perybałtyckiej na podstawie malakofauny
Abstract
Analizę paleoekologiczną i stratygraficzną przeprowadzono na podstawie licznych małżów z rodzajów: Liebea, Schizodus, Janeia, Edmondia, Phestia, Wilkingia, Permophorus, Bakevellia, Elimata i Astartella oraz mniej licznych ślimaków z rodzajów: Turbo, Straparolus i Natica. Najważniejszą skamieniałością przewodnią jest małż Liebea squamosa (Sowerby) masowo występujący w cechsztynie syneklizy perybałtyckiej, co świadczy o wyjątkowym przystosowaniu się tego gatunku do silnie zasolonego morza cechsztyńskiego. Ponadto ważną rolę odegrały bardzo licznie i dobrze zachowane małże z rodzaju Schizodus. PALEOECOLOGY AND STRATIGRAPHY OF THE ZECHSTEIN IN THE PERIBALTIC SYNECLIZE IN THE LIGHT OF STUDIES ON MALACOFAUNA Numerous bivalves and some gastropods found in the Zechstein in the Peribaltic Syneclize made possible through paleoecological and stratigraphic analyse of the strata. The fossils have been found in core material from the following boreholes: Swarzewo IG 1, Łeba IG 1, Darzlubie IG 1, Tupadła IG 1, Zdrada IG 1, Gnieżdżewo IG 1, Miłoszewo ONZ 1, Salino IG 1, Kętrzyn IG 1, Kościerzyna IG 1, Mieroszyno IG 1, Czarny Młyn IG 1, 2, 4, Karwia IG 1, Władysławowo IG 1, Chłapowo IG 4, Jastarnia IG 1, Kłanino IG 1, Werblina 1, Starzyno IG 2, and Puck IG 2. Ecological analysis of bivalves was carried out on the basis of representatives of species of the genera Liebea, Schizodus, Janeia, Edmondia, Phestia, Wilkingia, Permophorus, Bakevellia, Elimata, and Astartella.Gastropods are fairly scarce in the Zechstein in the above mentioned area so the studies were limited to some species of the genera Turbo, Straparolus, and Natica.In paleoecological and stratigraphic analyses, the attention was mainly paid to an important bivalve species Liebea squamosa (Sowerby). This species is regarded as important guide species for this part of the Permian on account of its occurrence in masses in the relevant strata. Representatives of that species appear more numerous in strata of that age than those of all the other bivalve taxa. This indicates especially good adjustment of that form to highly saline environment, typical of the Zechstein sea.Much attention is also paid to species of the bivalve genus Schizodus which, similarly as Liebea squamosa (Sowerby), are fairly common and well preserved in the studied strata.Downloads
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2013-04-02
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