The Cenomanian-Turonian Gharesu section in the east of Kopet-Dagh basin have been investigated to determine the relationship between palaeoenvironmental perturbations and nitrogen cycling across OAE2. This succession is composed of 43 m shale and marl interbedded with glauconitic sandstone and lies between Aitamir-Abderaz formations boundary. The nitrogen Isotope values fluctuate between 0‰ to ...

The type section of the Middle and Upper Jurassic Chaman Bid Formation is in the western Koppeh Dagh Basin (Northeast Iran). It is unusually thick and contains a rather rich ammonite fauna, ranging from Bathonian to Tithonian. The ammonites described here come from a 134-m-thick interval in the upper part of member (D) in the middle part of the formation, consisting of an alternation of grey li...

the paper is concerning preliminary survey of qaradaq region of eastern azerbaijan in view of ecological, archaeological and ethnographic perspectives. the region under study is poor in fertile soil, underpopulated settlements and nomadic ubas being its dominant landscape. indeed, archaeological investigations show the lack of considerable archaeological records up to the iron age. the main sub...

Irán es el principal centro de especiación y endemismo Astragalus (Fabaceae), mayor género angiospermas en viejo mundo. Las áreas los hotspots del no son bien conocidos necesaria una evaluación detallada utilizando aproximaciones SIG. En este artículo, se estudian patrones distribución espacial endemismos la riqueza especies, análisis parsimonioso endemicidad (PAE por sus siglas inglés) interpo...

We studied the behavior of earthquake network using HEALPix spherical pixelization and square cells methods. In first method, geographical region is divided into isolatitude rhombic-spherical same areas method. second we equal cells. To construct a network, if an happens in cell, that cell will become node, two nodes be connected with edge for successive events. The built from Iran’s seismic da...

The distribution patterns of taxa belonging to the section Hypoglottidei DC. were investigated using DIVA-GIS software. Based on Zohary classification, five global patterns, with the exception of widely distributed species, include 1. Centro-Asiatic province, 2. Irano-Anatolian province, 3. Pontic province, 4. East Mediterranean subregion and 5. West Mediterranean subregion, were identified. In...