Miocene miospores in the Upper Red Formation, Zanjan, northwestern Iran

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Vaez Javadi Fatemeh; Abbassi Nasrollah

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Journal Paper

Paper Information

Journal: GEOPERSIA Year:2024 | Volume:14 | Issue:1 Page(s): 199-212

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Title

Miocene miospores in the Upper Red Formation, Zanjan, northwestern Iran

Author(s)

Vaez Javadi Fatemeh | Abbassi Nasrollah | Issue Writer Certificate

Keywords

Miocene

Upper Red Formation

miospore

Zanjan

Abstract

Miocene miospores in the Upper Red Formation, Zanjan, northwestern IranAbstractThe Upper Red Formation has extensive outcrops in the southern and western parts of the Zanjan province, northwestern Iran. Here, we studied a sequence of lowermost part of this formation near Mehr-Abad village, northwestern Zanjan. Lithostratigraphy, sedimentology and ichnology of the URF have been studied in recent decades but palynology of this formation has not been investigated. This article is a preliminary report of miospores. The palynofloras comprise thirty species including three algae spores (in three genera), seven fern species (in seven genera), various type of gymnosperm (thirteen species designated to nine genera), and angiosperm pollen species (seven species designated to six genera); for example, Botryococcus sp., Closteritetrapidites magnus, and Diagonalites diagonalis of algal spores; Echinatisporis muelleri, Magnastriatites sp. cf. M. grandiosus, and Polyapodiaceoisporites potoniei of fern; Cathayapollis scheuringii, Cedripites sp., Ephedripites tertiarius, Pinuspollenites lobatus, P. minimus, Cupressacites spp., Tsugapollenites spp. of gymnosperm, and Acidanthera brevicollis, Calliandra spp., Fagopsis longifolia, Monoporopollenites sp., and Retitricolporites sp. of angiosperm evidenced herein. Moreover, botanical affinity of miospores considered. Therefore, Botryococcaceae/ Dictyosphaeriaceae, Closteriaceae, Zygnemataceae (algae); Marattiaceae, Pteridaceae, Polypodiaceae (fern); Cupressaceae, Ephedraceae, Pinaceae (gymnosperm), and Fagaceae, Fabaceae, Iridaceae, and Poaceae (angiosperm) identified.Keywords: Miocene, Upper Red Formation, spore, pollen, Zanjan, NW Iran.

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