Where: Turkey (37.9° N, 31.1° E: paleocoordinates 16.5° N, 23.2° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Sinemurian (199.3 - 190.8 Ma)

• The fauna from Sorkun Yaylası bears a striking resemblance to the Brachiopod fauna previously described by the present author (Ager, 1959) from another Turkish locality — Yakacık near Ankara — although the fossiliferous limestone blocks in the shales differ completely from the red «ammonitico rosso» marls at Yakacık. The specimens of Aulacothyris and Cincta are almost identical in preservation as well as in morphology. The ammonite evidence at Yakacık suggested a slightly earlier age than was suggested by the brachiopods (i.e. early to late Sinemurian rather than Late Sinemurian to Late Pliensbachian). It is noteworthy that certain highly distinctive Late Pliensbachian forms, such as Prionorhynchia and Zeilleria quadrifida (Lamarck), are absent both at Yakacık and at Sorkun Yaylası. The balance of evidence therefore suggests a Sinemurian or early Pliensbachian age.

•for this fauna.

• group of beds-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Primary reference: D. V. Ager, M. Gutnic, T. Juteau and O. Monod. 1978. New Early Mesozoic brachiopods from southern Turkey. Bulletin of the Mineral Research and Exploration Institute of Turkey 91:59-75 [J. Pálfy/M. Bosnakoff/M. Manojlovic]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 132601: authorized by József Pálfy, entered by Mariann Bosnakoff on 22.08.2012

Creative Commons license: CC BY (attribution)