Brachiopods and other fossils from Permo-Triasic boundary beds of the Antalya Nappes (SW Taurus, Turkey)
Articolo
Data di Pubblicazione:
2007
Citazione:
Brachiopods and other fossils from Permo-Triasic boundary beds of the Antalya Nappes (SW Taurus, Turkey) / L. Angiolini, L. Carabelli, A. Nicora, S. Crasquin-Soleau, J. Marcoux, R. Rettori. - In: GEOBIOS. - ISSN 0016-6995. - 40:6(2007), pp. 715-729.
Abstract:
An uppermost Permian–Lowerr Triassic biota of brachiopods, conodonts, algae and foraminifers from the Pamucak and Kokarkuyu formations
at Curuk Dag (Antalya, Turkey) is here described. The brachiopods belong to two different assemblages: a lower assemblage, early Wuchiapingian
in age, with Spinomarginifera cf. S. helica, Spinomarginifera cf. S. iranica, Alatorthotetina sp. ind., Orthothetina sp. ind., Ombonia antalyensis
nov. sp. and few specimens of Pennospiriferinoidea; an upper assemblage, Changhsingian in age, comprising S. cf. S. iranica, Spinomarginifera cf.
S. spinosocostata, Spinomarginifera sp. ind. and Orthothetina sp. ind., characteristic taxa of the low diversity survival brachiopod faunas of latest
Permian age (Survival Fauna 1). The occurrence of the conodont Hindeodus cf. praeparvus above the brachiopod fauna confirms its Changhsingian
age. The oolitic grainstones at the top of the Pamucak Formation contain Permocalculus sp., Macroporella cf. apachena, species of Hemigordius
and Palaeozoic Lagenida. Coarse calcite ï¬ brous cements pervade the oo-bioclastic grainstones, suggesting early marine cementation. The base of
the Kokarkuyu Formation is characterized by the disaster forms Earlandia amplimuralis and Cornuspira mahajeri, gastropods and ostracods.
The conodont Isarcicella lobata has been recovered 31 m above the base of the Kokarkuyu Formation, indicating the occurrence of the second
Triassic conodont zone above the parvus biozone and below the staeschei biozone. The faunal content at the transition of the Pamucak and
Kokarkuyu formations records the biotic survival in the aftermath of the end-Permian extinction. Facies evolution from lower energy inner
platform wackestones and packstones to higher energy open platform oolitic grainstones indicates a transgression at the top of the Pamucak
Formation, which continues into the Lower Triassic Kokarkuyu Formatio
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Brachiopods; Conodonts; Disaster taxa; Foraminifers; New species; Permo-Triassic boundary; Survival faunas
Elenco autori:
L. Angiolini, L. Carabelli, A. Nicora, S. Crasquin-Soleau, J. Marcoux, R. Rettori
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