Where: Azerbaijan (39.5° N, 45.2° E: paleocoordinates 8.6° S, 41.5° E)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Arpa Formation, Wordian (266.9 - 264.3 Ma)
• Basal unit of the Midian stage of the Tethyan timescale. Kotlyar et al. (1989) identified two fusulinid zones, the lower Yangchienia thompsoni and the upper Chusenella abichi. In central Iran, Chusenella abichi occurs with Neoschwagerina margaritae (Leven, 1998), suggesting a Wordian age for the entire Arpa Formation.
• group of beds-level stratigraphic resolution
Environment/lithology: lithified limestone
Size classes: macrofossils, microfossils
Primary reference: G. V. Kotlyar, Y.u. D. Zakharov, G. S. Kropatcheva, G. P. Pronina, I. O. Chedija and V. I. Burago. 1989. Evolution of the latest Permian biota: Midian regional stage in the USSR 1-184 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 110888: authorized by Matthew Clapham, entered by Matthew Clapham on 15.06.2011
Creative Commons license: CC BY (attribution)
Taxonomic list
Foraminifera | |
Pseudofusulina sp. Dunbar and Skinner 1931
Chusenella ex gr. glenisteri Skinner and Wilde 1966 | |
Strophomenata | |
Ogbinia dzhagrensis Sarycheva 1965 |