Dvuyakornaya Formation

Dvuyakornaya Formation is a geological formation from the Cretaceous period in Crimea, south of Yalta.{{cite journal | title=Biostratigraphy of Jurassic-Cretaceous boundary sediments in the Eastern Crimea | author=V. V. Arkad’ev | author2=A. A. Fedorova | author3=Yu. N. Savel’eva | author4=E. M. Tesakova | journal=Stratigraphy and Geological Correlation | date=2006 | volume=14 | issue=3 | page=302 | doi=10.1134/S0869593806030063 | bibcode=2006SGC....14..302A | name-list-style=amp }} Remains found there include: ammonites,{{cite book | title=Kyiv Ammonite [Ukrainian] | url=http://paleo.ua/paleometro/ | author=Pylypenko D. | access-date=2011-07-18 | archive-url=https://web.archive.org/web/20120327190211/http://paleo.ua/paleometro/ | archive-date=2012-03-27 | url-status=dead }} such as Berriasella, and brachiopods.{{cite book | title=Apodosia, an enigmatic genus of micromorphic brachiopods from Cretaceous of Crimea and Jurassic of England| author= T.N.Smirnova| author2= D.I.McKinnon| year=1995}}