Tortonian Stage

Tortonian Stage

 

the upper stage of the Middle Miocene of the Neogene system of Western Europe. It was identified in 1857 by the Swiss geologist K. Mayer-Eymar in northern Italy. It is represented by blue marls with deepwater fauna characterized by mollusks. The corresponding stages in the northern part of the European USSR are the Karagan and Konka [seeNEOGENE SYSTEM (PERIOD)].

References in periodicals archive ?
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.
The Middle-Upper Miocene: 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.
The Middle-Upper Miocene: The Middle Miocene, of Helvetian and Tortonian stages, can be traced in the Gobustan and Pre-Caspian Guba regions and in the inter-fluve of the Kura and Iori rivers, where the Tortonian state is spread and is found in the Absheron region.
The Middle Miocene, of Helvetian and Tortonian stages, can be traced in the Gobustan and Pre-Caspian-Guba regions and in the inter-fluve of the Kura and Iori rivers, where the Tortonian state is spread and is found in the Absheron region.