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Muszloraczkowa stratygrafia pogranicza permu i triasu : rzeczywistość czy mit?

Becker A.

Przegląd Geologiczny

2014

Vol. 62, nr 4

184--189

In the last years, the conchostracan stratigraphy has become a popular method for distingushing the Permian/Triassic boundary in intracontinental settings. This paper provides a background of chronostratigraphic interpretation of the new method. Several problems are reported, from which the most important are: 1 – lack of consequent documentation of the index species, 2 – indirect correlation with the conodont stratigraphy through the sporomorph spectra, 3 – lack of definition and documentation of supporting palynologic zones, 4 – difficulties in taxonomic determinations of conchostracan. Revision of the method by several independent research teams is suggested.

Conchostraca [muszloraczki] z najniższego pstrego piaskowca Zachełmia, Góry Świętokrzyskie

Ptaszyński T., Niedźwiedzki G.

Przegląd Geologiczny

2004

Vol. 52, nr 12

1151--155

Contemporary Conchostraca [clam shrimps] live in temporary and permanent freshwater ponds and pools. They have wide geographic distribution. Their fossils are abundant in the Buntsandstein and very important markers for chronostratigraphic correlation between marine and continental sections. The conchostracan assemblage found in the lowermost Buntsandstein at Zachełmie quarry: Falsisca postera, Falsisca eotriassica, Palaeolimnadia cf. cishycranica, Euestheria ex gr. gutta, Euestheria gutta oertlii indicates the uppermost Permian age of at least the most of Jaworznia Formation [A1 petrographical complex], cropping out at the Zachełmie quarry in the Holy Cross Mountains, Poland.