Tortonian


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Tortonian

[tȯr′tō·nē·ən]
(geology)
A European stage of geologic time: Miocene (above Helvetian, below Sarmatian).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Upwards in the sequence, Tortonian sandstone and clay levels represent the foredeep deposits of the Apennine chain, with a thickness of 800 m [35].
The palaeontological study of fossil assemblages from the Upper Miocene (Tortonian) marine deposits of the eastern sector of the Guadalquivir Basin allows interpreting palaeoenvironmental and depositional conditions when this basin acted as a connection between the Atlantic Ocean and the Mediterranean Sea.
Tortonian flora from the "Gdow Bay" in the South of Poland.
The Middle Miocene of Helvetian and Tortonian stages can be traced in the Gobustan and Pre-Caspian Guba and in the inter-fluve of the Kura and Iori, where the Tortonian is spread to the Absheron region.
In contrast, coralline red algae communities become dominant, as most phototrophic carbonate producers thrive in shallow marine environments [49], especially through Early Miocene to Tortonian [14].
The amount of uplift of this area during the early Tortonian reached 200-350 m, and during the subsequent episods of tectonic mobility in Messinian and Zanclean time it varied from 75 to 300 m.
Similar evidences were revealed by drillings: the presence of small karst caves at the contact between the Messinian evaporitic formation (Gessoso Solfifera Formation) and the older Tortonian marls (SanfAgata Fossile Formation).