Writers : Saadati Jafarabadi,Sh.;Allameh, M.;Pour Soltani, M.R.
Refference : The first international applied geological congress; Department of geology Islamic azad university- Mashhad
Publishing Year : 2010

Abstract :

the gradual zone Binalood geological unit between Centeral Iran and Alborz ,real development of this zone between areas north of Sabzevar,Neyshabor,Mashhad .Shemshak formation is one of the late and middle Jurassic formation s series eastern Alborz basin in east of Iran and its consists shale and carbonaceous sandstone.The studied section is located in the 3 kilometers of Bar village east longitude and 36,28,49.5 north latitude and have thicknes about 255 meters and the mostly litho logy dark gray shale.In order to study amount oxygen relative changes and sedimentary rate mentioned formation in section the Bar village take on the number of 28 sample and proved to be 112 Palynological slides and according to Palynomorphic elements which exists in Palynologic slides and considering three main of group of palynological elements including; Palynomaseral , Palynomorphs and structures less organic matter(SOM) and SOM ecological factors such as; Lability, SOM(t)/ SOM (op),SOM/marine Palynomorphs, SOM/Palynomaseral(b) and M.E/C.E, Oxygen amount and sedimentation rate have been studied during deposition this formation.Based on oxygen amount and sedimentary rate during the deposited of formation become changeable but in general rates obtained from study ecologic factors during formation and study of section Palynofacies can thus deduce that: In general, one can result in that the main part of Shemshak Formation in the section of Bar village has been formed in a relatively high oxygen condition and sedimentation low rate.

Subject List : Oxygen fluctuations , Palinostratigraphy