A stratigraphical correlation and the deposit environmental changes of the Ruteh formation in Alborz
Subject Areas :Masoomeh Elyasi Rad 1 , Jafar Ghomi Oveyli 2
1 - کارشناس ارشد چینه شناسی و فسیل،دانشگاه آزاد اسلامی واحد چالوس
2 - استادیار گروه زمین شناسی دانشگاه آزاد اسلامی واحد چالوس
Keywords: Alborz, Ruteh Formation, Stratigraphical correlat,
Abstract :
In order to study the stratigraphical correlation and environmental changes of the Ruteh Formation deposits inthe Alborz Region, four stratigraphical sections in the central Alborz Region (South of Nowshahr, Chalus, andAmol) and Eastern Alborz (Ghoznavi) were studied. Lithology of the Ruteh Formation in the Alborz Region arealmost limestone rock and the deposits of the Formation are specified by detrital facies and carbonated facies(limestone and dolomite). The deposits have a great thickness and their thickness is variable in different sections.Therefore the Ruteh Formation thickness in Manjir section (South of Nowshahr) is 493m, and 200m in the North– West Harijan section, 480m in Amol section and the thickness reaches 115m in Ghoznavi (Eastern Alborz)section. Ruteh Formation in these sections was determined at Artinskian- Murghabian age based on the fossilsextracted. Based on the field study, and thin sections, four facies including Tidal flat, Lagoon, Braaier and Openmarine were identified.
