<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Information on Jurassic palynomorphs from the Greater Caucasus is potentially of great importance, but its availability to the international research community is severely limited. New palynological data for Toarcian deposits of the Western Caucasus are recorded in the present paper. Particularly, dinoflagellate cysts are described for the first time from the Bagovskaja Formation; palynomorphs are found in sandstone levels within this unit. The most representative assemblage includes pollen (with predominant bisaccate pollen), spores (<italic>Cyathidites</italic> being commonest), and dinoflagellate cysts amongst which the predominant taxon is <italic>Nannoceratopsis spiculata</italic>. The dinocyst assemblage implies a late Toarcian age for the upper part of the Bagovskaja Formation. On the basis of these new palynostratigraphical results, the range of the formation is extended; previously, only the lower part had been dated on ammonite evidence.</p></abstract>

Information on Jurassic palynomorphs from the Greater Caucasus is potentially of great importance, but its availability to the international research community is severely limited. New palynological data for Toarcian deposits of the Western Caucasus are recorded in the present paper. Particularly, dinoflagellate cysts are described for the first time from the Bagovskaja Formation; palynomorphs are found in sandstone levels within this unit. The most representative assemblage includes pollen (with predominant bisaccate pollen), spores (Cyathidites being commonest), and dinoflagellate cysts amongst which the predominant taxon is Nannoceratopsis spiculata. The dinocyst assemblage implies a late Toarcian age for the upper part of the Bagovskaja Formation. On the basis of these new palynostratigraphical results, the range of the formation is extended; previously, only the lower part had been dated on ammonite evidence.

New palynological data for Toarcian (Lower Jurassic) deep-marine sandstones of the Western Caucasus, southwestern Russia

Trofimuk Institute of Petroleum Geology and Geophysics of Siberian Branch of Russian Academy of Sciences

Geologos

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Information on Jurassic palynomorphs from the Greater Caucasus is potentially of great importance, but its availability to the international research community...

New palynological data for Toarcian (Lower Jurassic) deep-marine sandstones of the Western Caucasus, southwestern Russia

Published Online: Oct 04, 2018

Page range: 127 - 136

Received: Sep 13, 2017

Accepted: Apr 28, 2018

DOI: https://doi.org/10.2478/logos-2018-0012

Keywords
dinoflagellate cysts, pollen and spores, sandstones, Jurassic, Greater Caucasus

© 2018 Anna A. Goryacheva et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

New palynological data for Toarcian (Lower Jurassic) deep-marine sandstones of the Western Caucasus, southwestern Russia

Published Online: Oct 04, 2018

Page range: 127 - 136

Received: Sep 13, 2017

Accepted: Apr 28, 2018

DOI: https://doi.org/10.2478/logos-2018-0012

Keywordsdinoflagellate cysts, pollen and spores, sandstones, Jurassic, Greater Caucasus

© 2018 Anna A. Goryacheva et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
dinoflagellate cysts, pollen and spores, sandstones, Jurassic, Greater Caucasus