- Tytuł:
- Molluscs from the Early Frasnian goniatite level at Kostomloty in the Holy Cross Mountains, Poland
- Autorzy:
-
Jagt-Yazykova, E
Krawczynski, W.
Rakocinski, M. - Powiązania:
- https://bibliotekanauki.pl/articles/20723.pdf
- Data publikacji:
- 2006
- Wydawca:
- Polska Akademia Nauk. Instytut Paleobiologii PAN
- Tematy:
-
paleontology
mollusc
Early Frasnian
Frasnian
goniatite level
Kostomloty commune
Holy Cross Mountains
Polska
Devonian
Goniatitida
Nautiloida
Gastropoda
Bivalvia
paleoecology
Acanthoclymenia
Linguatornoceras
Koenenites
new species
Palaeozygopleura pyritica
bivalve
Glyptohallicardia multicostata - Opis:
- The unique goniatite−rich pyritic level, 1.6 m thick, exposed at Kostomłoty (Holy Cross Mountains, central Poland) represents a distinct, local biotic event in the Early Frasnian interval corresponding to the inception of a major geochemical (carbon cycling) perturbation in the stagnant deep−water and oxygen−deficient Kostomłoty basin. The taxonomic and palaeoecologic characteristics of molluscan fossil associations from the Goniatite Level are presented. Most of the goniatitids and orthoconic nautiloids from the studied fossil assemblages are juvenile conchs or protoconchs, or incomplete phragmocones and represent the genera Acanthoclymenia and Linguatornoceras, the former being predominant, and a single adult specimen probably of the genus Koenenites. In contrast, gastropods and bivalves are generally well preserved and identifiable to species level. Two new species are described: a gastropod Palaeozygopleura (Bohemozyga) pyritica sp. nov. and a bivalve Glyptohallicardia multicostata sp. nov. These studied molluscs and also amphiporoids are allochthonous elements which must have been transported into the deeper settings during sea−level rise and flooding of fringing reefs (Timan Event) and/or storm events, and there were mixed with pelagic cephalopods. Probably, a sea−level rise even led to flooding of nearby areas, and thus to introduction of pelagic material (juvenile cephalopods) into reefal settings, and then back to the deeper water again by the quasi−estuarine circulation of water masses.
- Źródło:
-
Acta Palaeontologica Polonica; 2006, 51, 4; 707-718
0567-7920 - Pojawia się w:
- Acta Palaeontologica Polonica
- Dostawca treści:
- Biblioteka Nauki
Artykuł