Middle Triassic


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Middle Triassic

[′mid·əl trī′as·ik]
(geology)
The geologic epoch occurring between the Upper and Lower Triassic, beginning approximately 215,000,000 years ago.
References in periodicals archive ?
"The Luoping site dates from the Middle Triassic and contains one of the most diverse marine fossil records in the world," said Professor Mike Benton.
A durophagous dentition has been described for several clades of Middle Triassic marine reptiles: placodonts (but see Diedrich, 2010 for an alternative interpretation), some ichthyosaurs (Omphalosaurus, Tholodus, etc.; McGowan and Motani, 2003), claraziids and thalathosaurs.
(2002): A review of Rhynchosauroides tyrolicus Abel, 1926 ichnospecies (Middle Triassic: Anisian-Ladinian) and some inferences on Rhynchosauroides trackmaker.
(2007): Latest Permian to Middle Triassic cyclomagnetostratigraphy from the Central European Basin, Germany: Implications for the geomagnetic polarity timescales.
(2005): The carbon and sulfur cycles and atmospheric oxygen from middle Permian to middle Triassic. Geochimica et Cosmochimica Acta, 69 (13): 3211-3217.
For example, the Buntsandstein in Germany corresponds to the Lower Triassic while in Luxembourg and a large part of Spain it corresponds not only to the Lower but also to the Middle Triassic (Virgili et al., 1977, 1987).
subfam.), which encompass a Middle Triassic Gondolelloid lineage that originated in the Sephardic realm, westernmost shallow Neotethys, from where, in the course of the Ladinian and earliest Carnian, some of its species spread to the world oceans, before extinction as a result of the Carnian salinity crisis.
Table 1.- Epochs, ages and time duration in the Permian and Triassic (see text for details) Tabla 1.- Epocas, edades y lapsos temporales del Permico y el Triasico (ver texto para mas detalle) Epoch Age dt (in Ma) LATE TRIASSIC Norian 16.9 Carnian 11.5 MIDDLE TRIASSIC Ladinian 9 Anisian 8 EARLY TRIASSIC Olenekian 4.7 Induan 1.3 LATE PERMIAN Tatarian 9.4 Guadalupian 10.2 Leonardian 9.4 EARLY PERMIAN Sakmarian 14.6 Asselian 4.4 Fig 1.--Number of first appearances (FA) by age and taxon Fig.
(2000): Middle Triassic paleomagnetic data from northern Bulgaria: constraints on Tethyan magnetostratigraphy and paleogeography.
In the primary exploration target in the Havert formation, as well as in the overlying Klappmyss formation (from the Early to Middle Triassic Age), the well encountered sandy, but mainly tight intervals.