Ammonite distributions and its relation with the sea-level changes in the Sarcheshmeh and Sanganeh Formations at the Kopet Dagh Basin in north east of Iran

Category Mineral processing
Group GSI.IR
Location The 24 Symposium of Geosciences
Author Seyed Naser Raisossadat
Holding Date 27 August 2007

Abstract:

The Kopet Dagh sedimentary basin is situated in the north-east of Iran and the south of Turkmenistan. The relationship between ammonite distributions and the sea-level changes has been discussed in the Sarcheshmeh and Sanganeh Formations. Lithological log, the first appearance of ammonite genera or species, parasequence boundaries (PSB), relative sea-level changes and ammonite taxa numbers have been integrated in measured sections. The number and diversity of ammonite genera and species reached its highest in the Late Barremian and Early Aptian, and decreased in Mid and Late Aptian times. Parasequences (and sequences) show that in the Late Barremian and Early Aptian sea-level fluctuated more than in Mid and Late Aptian times

tags: QAZVIN