Facies and biota of Anisian to Carnian carbonate platforms in the Northern Calcareous Alps (Tyrol and Bavaria) |
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Authors: | Dr Thomas Rüffer Dr Valeria Zamparelli |
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Institution: | 1. Institut für Geologische Wissenschaften und Geiseltalmuseum, Martin-Luther-Universit?t Halle, Domstra?e 5, D-06108, Halle 2. Dipartimento di Scienze della Terra, Università degli Studi di Napoli Federico II, Largo San Marcellino 10, I-80138, Napoli
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Abstract: | Summary During the Middle and early Late Triassic carbonate ramps and rimmed platforms developed at the northwestern margin of the
Tethys ocean. In the Northern Calcareous Alps, Anisian stacked homoclinal ramps evolved through a transitional stage with
distally steepened ramps to huge rimmed platforms of Late Ladinian to Early Carnian age. Middle Triassic to early Late Triassic
facies and biota of basin, slope and platform depositional systems are described. Special emphasis is given to foraminifers,
sponges, microproblematic organisms and algae.
The Ladinian to early Carnian reef associations are characterized by the abundance of segmented sponges, microproblematica,
biogenic crusts and synsedimentary cements. Among the foraminifers, recifal forms likeHydrania dulloi andCucurbita infundibuliformis (Carnian in age) are reported from the Northern Calcareous Alps for the first time. Some sphinctozoid sponges likeParavesicocaulis concentricus were known until now only from the Hungarian and Russian Triassic. |
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Keywords: | Carbonate facies Paleontology Northern calcareous Alps Austria Bavaria Triassic |
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