Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Restudy of Members 5 of Chalus Formation in type section

Document Type : Original Research Paper

Author
Behrouz Darvishzadeh
Department of Geology, Islamic Azad University, Lahijan, Iran
Abstract
In this article, stratigraphy and paleogeography of members 5 of Chalus Formation has been studied. On the basis of stratigraphical position, the member 5, is formed in the Middle- Upper Cenomanian time and consists of conglomerate and basic volcanic rocks with 500 m. thickness.
During the Cenomanian stage in the Chalus area (Northern flanks of Central Alborz) deep sea sedimentation was broken by several volcanic activities. These transformations caused to rise of the sea floor and created the temporary islands. After a little time, these lands went under water and Cenomanian deep sea covered all the islands again.
Keywords
Stratigraphy
Paleogeography
Chalus Formation
Iran

Subjects

Bolli, H., Sanders, J.B.; Perch-Nielson, K., I 987- Plankton stratigraphy. Camb. Unive. Press.
Cartier, E.G.1971- Die Geologie des Unteren Chalus Tals, Zentral Alborz-Iran, Mitt. Geol. Inst. E.T.H. U.Zurich.
Sliter, W. V., 1989- Biostratigraphy zonation for Cretaceous Planktonic Foraminifers examined in thin section. Journal of Foraminiferal Research. Vol 19, No. I.
Scientific Quarterly Journal of Geosciences
Volume 11, 41-42
Autumn & Winter 2002, Vol. 11, No. 41-42
Winter 2001
Pages 60-65