In the geologic timescale , the Middle Triassic is the second of three epochs of the Triassic period or the middle of three series in which the Triassic system is divided in chronostratigraphy . The Middle Triassic spans the time between 247.2 Ma and 237 Ma (million years ago). It is preceded by the Early Triassic Epoch and followed by the Late Triassic Epoch. The Middle Triassic is divided into the Anisian and Ladinian ages or stages .
4-457: The Partnach Formation is a Middle Triassic geologic formation in the eastern Northern Limestone Alps and Western Carpathians , within Austria and Slovakia , Central Europe . The formation consists of alternating grey and green marls and shales (Partnach shales) and grey limestones (Partnach Limestone), often brecciated , oncolithic and containing clay intraclasts . The formation
8-909: Is gradually evolving from the Reifling Formation . It is usually overlain by the Lunz/Reibl Formation or Wetterstein Formation . Sediments of the Partnach Formation were deposited in intrashelf basins . The rock unit was originally defined as Partnachschichten by Wilhelm von Gümbel in 1858. It preserves fossils dated to the Ladinian age of the Middle Triassic Epoch of the Triassic Period . Middle Triassic Formerly
12-487: The marine reptiles (e.g. ichthyosaurs , sauropterygians , thallatosaurs ), ray-finned fish and many invertebrate groups like molluscs ( ammonoids , bivalves , gastropods ). During the Middle Triassic, there were no flowering plants, but instead there were ferns and mosses. Small dinosauriforms began to appear, like Nyasasaurus and the ichnogenus Iranosauripus . This article related to
16-531: The middle series in the Triassic was also known as Muschelkalk . This name is now only used for a specific unit of rock strata with approximately Middle Triassic age, found in western Europe. Following the Permian–;Triassic extinction event , the most devastating of all mass-extinctions, life recovered slowly. In the Middle Triassic, many groups of organisms reached higher diversity again, such as
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