Anisian


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Anisian

[ə′nis·ē·ən]
(geology)
Lower Middle Triassic geologic time.
References in periodicals archive ?
from the Anisian to Norian of Europe, the Anisian of the Middle East, and the Ladinian or Carnian of China (Wild 1973, 1980; Rieppel et al.
Based on the stratigraphic situation, lithological similarities and lithocorrelation, it has been assigned to the Anisian age Shotori Formation (Figs.
Middle Triassic tectonics led to the upwelling of hydrothermal solutions, which expelled their deposits onto the sea bed through a thick layer of Upper Palaeozoic, Permian, Scythian, and Anisian clastic and carbonate rocks (Mlakar, 1969).
Polychaeta (Annelida) from the Upper Anisian (Middle Triassic) of Qingyan, south-western China.
Type genus: Chauliodites Heer, 1864 with 11 species from the Severodvinian--Olenekian of Russia, Induan of Mongolia, Olenekian of Germany, Anisian of France and Middle Triassic of China (Aristov, 2003, 2004b, 2008).
The Annaberg mines and the small Arzriedel mine near Trubenbach/Otscher lie within Anisian (lower Middle Triassic) carbonates whereas the other occurrences are in the Ladinian (upper Middle Triassic) Wetterstein Limestone-Dolomite.
Transitional forms from Neospathodus to Paragondolella are known in the basal Olenekian and from Neospathodus to Neogondolella in the latest Olenekian and basal Anisian (Kozur 1990a; 1990b).
The presence of age diagnostic spores and bissacate pollen preserved in the Tredian Formation of the Nammal Gorge and Zaluch Nala sections represent an Anisian age.
Nothosaurus giganteus is a large nothosaur found in the upper Muschelkalk and the lower Keuper (in Anisian, Ladinian and Carnian levels, i.
Thus, the unit accumulated during the middle Triassic near the limit between the Anisian and Ladinian.
Unfortunately, Early Triassic fossils are lacking between the common "Thuringian" and Anisian assemblages due to the presence of a stratigraphic hiatus and/or the existence of arid environments that prevented optimal conditions for life and fossil preservation, causing difficulties with the age determination of the Early Triassic deposits.