Home » ArticlesArticlesStudy of planktonic morphotype of the Abderaz Formation at type section,IRANWriters : Shafiee Ardestani,M.;Ghaseminejad,E.;Vahidinia, M.; Asgharian rostami,M.;Balmaki, B. Refference : The first international applied geological congress; Department of geology Islamic azad university- Mashhad Publishing Year : 2010 Abstract : Abderaz Formation at its type section with an age of Turonian-Early Campanian and a thickness of 300 m contains light grey shale and marl. The study of the planktonic foraminifera in isolated form led to differentiate three morphotype groups. The first group is characterized by trochospiral tests usually indicate shallow waters, the second group contains forms with strong ornamentations and the primary keels representing mid waters and finally compact trochospiral tests with keels known as deep water indices are included in the third group. Studies on the morphotypes showed a regressive cycle for Abderaz Formation. Subject List : Plankton |
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