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TitleAras Valley (northwest Iran): high-resolution stratigraphy of a continuous central Tethyan Permian-Triassic boundary section
AuthorGliwa, J; Ghaderi, A; Leda, L; Schobben, M; Tomas, S; Foster, W J; Forel, M B; Tabrizi, N G; Grasby, S EORCID logo; Struck, U; Ashouri, A R; Korn, DORCID logo
SourceFossil Record vol. 23, 1, 2020 p. 33-69, Open Access logo Open Access
Alt SeriesNatural Resources Canada, Contribution Series 20200191
PublisherCopernicus Gesellschaft Mbh
Mediapaper; on-line; digital
File formatpdf
AreaAras Valley; Iran (Islamic Republic of)
Lat/Long WENS 45.4344 45.4347 39.0156 39.0153
Subjectsenvironmental geology; Science and Technology; Nature and Environment; stratigraphy; stratigraphic analyses; biostratigraphy; carbonate; microfacies; conodonts; carbon isotopes; environmental studies; Permian; Triassic
Illustrationslocation maps; photographs; columnar sections; sections; tables
Released2020 02 21
AbstractThe Permian-Triassic boundary section in the Aras Valley in NW Iran is investigated with respect to carbonate microfacies, biostratigraphy (particularly conodonts, nautiloids, and ammonoids), chemostratigraphy (carbon isotopes), and environmental setting. Correlation of the data allows the establishment of a high-resolution stratigraphy based on conodonts (with four Wuchiapingian, 10 Changhsingian, and three Griesbachian zones), ammonoids (with nine Changhsingian zones), and carbon isotopes; it forms the base for the reconstruction of the environmental changes before and after the end-Permian extinction event at the studied locality. In the Aras Valley section, there is no evidence for the development of anoxic conditions, associated with the end-Permian mass extinction.

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