A new Oligocene leaf assemblage from the Ghalandar area (NW Iran) and its contribution to understanding of floristic evolution in the eastern Paratethys

 

Authors: Kvaček Z, Bubík M

Published in: Bulletin of Geosciences, volume 91, issue 4; pages: 705 - 715; Received 3 August 2016; Accepted in revised form 5 December 2016; Online 13 January 2017

Keywords: flora, Oligocene, eastern Paratethys, Iran,

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Abstract

The geological survey in NW Iran (Ahar area, Ghalandar village) carried out by the Czech Geological Survey in the years 2007-2009 provided new data on the geology, coal petrography and palaeobotany of this part of the eastern Paratethys. The recovered plant impressions, dated by radiometric ages of associated volcanic rocks to the Oligocene, have been identified as Osmunda parschlugiana (Unger) Andr., Picea (sect. Omorika) sp., cf. Magnolia sp., Eotrigonobalanus furcinervis (Rossm.) Wa lther&Kvaček, cf. Acer aegopodifolium (Göpp.) Baik. and Dicotylophyllum subpeltatum Kvaček sp. nov. The site characterizes a new floristic assemblage (“complex”) Ghalandar in the eastern Paratethys, which differs from the Oligocene broad-leaved evergreen floristic assemblage of Dilizhan previously defined from the Caucasus area by the mixed-mesophytic character of forest vegetation.

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