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Biostratigraphy of the Nayband Formation on the basis of plant macrofossils in the Parvadeh Coal Mines, Tabas

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Author(s): Fatemeh VaezJavadi

Journal: Journal of Stratigraphy and Sedimentology Researches
ISSN 2008-7888

Volume: 46;
Issue: 1;
Date: 2012;
Original page

Keywords: Biostratigraphy | Rhaetian Flora | Nayband Formation | Ghadir Member | Tabas

ABSTRACT
The Ghadir Member of the Nayband Formation is well-exposed in the Parvadeh mine area, southwest Tabas city, Central-East Iran. It contains abundant well-preserved plant macrofossils belonging to 24 taxa of various orders, such as Equisetales, Osmundales, Filicales, Peltaspermales, Bennettitales, Cycadales, and Coniferales. Based on the occurrence of Equisetites arenaceus, Scytophyllum persicum, Pterophyllum aequale, Pterophyllum bavieri, and Nilssoniopteris musafolia the Rhaetian age is suggested for this assemblage. Furthermore, Neocalamites cf. meriani, Weltrichia primaeva, and Carpolithes sp. are reported for the first time from this area. According to stratigraphic distribution of taxa, one biozone is recognized- Assemblage zone I. This assemblage of plant macrofossil remains suggests a humid tropical to subtropical climate for this period of time
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