مطالعه سيستماتيك فسيل هاي گياهي سازند شمشك ناحه قشلاق

Systematic Study of Plant Fossils of Shemshak Formation of Gheshlagh Area

There is a high diversity of Mesozoic plants, such as Cycadophyta, Pterophyta, Coniferophyta, Ginkyophyta in the Upper Trias-Lias of Iran. Litho stratigraphycally deposites of studied area (Shemshak Formation) can be divided into there parts. The first part contains plant fossils which can be used for age determination and interpration of climatic history of the past. On the basis of systematic studies, some of the most important fossils are: Cladophlebis cf. australis, Pterophyllum bavieri, Zamites sp.1, Elatocladus conferta, and Scytophyllum persicum. Most of the studied speciemen are long range flora, but the presence of Scytophyllum persicum in part I indicates the age of Upper Trias (Rhaetian) for this part of the Formation. Collected flora suggest a subtropical condition in the time of deposition of the Shemshak Formation.