Relationship between depth and morphology of foraminifera in Abderaz Formation, IRAN

• Published in: Nature Precedings
• Main Authors: Meysam Shafiee Ardestani, Masoud Asgharian rostami, Behzad Balmaki, Behnaz Balmaki
• Format: Manuscript
• Language: unknown
• Published: 2010
• Subjects: Earth & Environment; Planktonic foraminifera
• Online Access: http://precedings.nature.com/documents/4264/version/1; https://doi.org/10.1038/npre.2010.4264.1

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. In the present study the depth of Abderaz Formation was determined using planktonic morphotypes. As Results of the study all changes in test of planktons were observed in related to the water depth of their ecosystem. The data of the represented research are in confirmation with the Pascal Law.