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Jurassic Forum » JURASSIC references & paper reviews » Jurassic around the world » Azimi et al. (2008) (Calpionellid Zonation at Jurassic-Cretaceous Boundary, Iran)
Azimi et al. (2008)
mhornДата: Monday, 25.01.2010, 23:05 | Сообщение # 1
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Azimi R., Seyed-Emami K., Sadeghi A. (2008) Introducing of Calpionellid Zonation at the Jurassic-Cretaceous Boundary in the Shal Section (South-East of Khalkhal) // Geosciences Scientific Quarterly Journal. No.68. P.16-25
Pdf: http://gsjournal.ir/Portals/_DanaPortal/Papers/391/p-e239355dec5b.pdf
The calpionellid biozonation within Shal and Kolur Formations in Shal region, SE Khalkhal are accomplished based on standard biozonation of Allemann et al. (1977). In this study, 5 biozones are introduced from Tithonian to Hauterivian: biozone. Biozone 1 belongs to Shal Formation and biozones 2 to 5 to Kolur Formation: 1- Crassicollaria intermedia Taxon Range Zone; Late Tithonian, 2- Calpionella alpina Acme Zone; Early Berriassian, 3- Calpionellopsis simplex-Calpionellites darderi Interval Zone; Late Berriassian to Early Valanginian, 4- Calpionellites darderi-Tintinopsella longa Interval Zone; Valanginian, 5- Tintinopsella longa-Tintinopsella carpathica Interval Zone; Late Valanginian-Hauterivian. Biozone 2 is also subdivided into the Calpionella alpina and Calpionella elliptica Subzones. Biozone 3 is subdivided into the Calpionellopsis simplex and Calpionellopsis oblonga Subzones. Based on this zonation, the Jurassic /Cretaceous boundary (Tithonianl Berriassian) is defined at the Lower boundary of the Calpionella alpina zone which is equivalent to the Shal and Kolour Formation boundary.


Middle Jurassic - Lower Cretaceous ammonites & aptychi
 
Jurassic Forum » JURASSIC references & paper reviews » Jurassic around the world » Azimi et al. (2008) (Calpionellid Zonation at Jurassic-Cretaceous Boundary, Iran)
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