Rhaetian/Hettangian palynomorphs of the Tatra Mountains (West Carpathians)

• Autorzy: Gaździcki A. , Waksmundzka M. , Hołda-Michalska A.
• Konferencja: International Congress on the Jurassic System (7 ; 06-18.09.2006 ; Kraków, Poland)
• Języki publikacji: EN

Abstrakty

EN

The uppermost Triassic and the lowermost Jurassic clastic-carbonate strata of the Sub-Tatric (Kriżna) unit of the Polish Tatra Mountains yield an important assemblage of microfossils - mostly foraminifers and also palynomorphs. The three representative Triassic/Jurassic boundary sections of the Kriżna unit (Lejowa Valley, Strążyska Valley and Mt. Mały Kopieniec) have been studied and sampled in order to establish a stratigraphical succession of microfossils. The palynomorph assemblage (spores, pollen grains and dinoflagellate cysts) were found in the transitional beds of the Fatra Formation (Rhaetian) and the basal clastics of the Kopieniec Formation [Hettangian-Sinemurian(?)] - Fig. 1. The assemblage contains 58 spore and pollen species and is dominated by pteridophyte spores (Dictyoniaceae and Matoniaceae). The biostratigraphically significant taxa: Concavisporites, Dictyophyllidites and Leptolepidites, indicate Rhaetian/Hettangian time interval (Fig. 1) - see Zavattieri, Batten (1996). The facies development and floral and faunal assemblages of the Triassic/Jurassic boundary sequence in the Kriżna unit are characteristic for the shallow-marine sedimentary environment (shoreface-offshore). The data presented support the earlier views (Goetel 1917; Gaździcki 2003) that the environmental conditions prevailing in the Tethys realm were quite similar to those in the epicontinental basin of the northwestern Europe during the Early Liassic times.

Słowa kluczowe

EN

Triassic/Jurassic palynomorphs; biostratigraphy; palynofacies; Tatra Mts.; Poland

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Volumina Jurassica
• Rocznik: 2006
• Tom: Vol. 4, no. 1
• Strony: 280--281
• Opis fizyczny: Bibliogr. 3 poz.

Twórcy

autor

Gaździcki A.

autor

Waksmundzka M.

autor

Hołda-Michalska A.

• Institute of Paleobiology, Polish Academy of Sciences, ul. Twarda 51/55, PL-00818 Warszawa, Poland,

Bibliografia

• 1. Gaździcki A. 2003. Triassic/Jurassic boundary of the Tatra Mountains in light of micropaleontological data. In: Michalík J. (Ed.), IGCP 458: Triassic/Jurassic Boundary Events. Third Field Workshop, Stará Lesná, Slovakia, Tatra Mts., October 11-15th 2003. Bratislava: 29-32.
• 2. Goetel W. 1917. Die rhätische Stufe und der unterste Lias der subtatrischen Zone in der Tatra. Bulletin de l’Académie des Sciences de Cracovie, Classe de Sciences Mathématiques et Naturelles. Série A: 1-222.
• 3. Zavattieri A. M. and Batten D. J. 1996. Miospores from Argentinian Triassic deposits and their potential for intercontinental correlation. In: Jansonius J. and McGregor D. C. (Eds), Palynology: principles and applications, American Associaction of Stratigraphic Palynologists Foundation, 2: 767-778.