Middle Cenomanian ammonites from the type section of the Sanandinovo Formation of northern Bulgaria

Authors

  • William J. Kennedy Oxford University Museum of Natural History, Parks Road, Oxford OXI 3PW
  • Nikolai Jolkicev Department of Geology & Geography, University of Sofia, Russki Boulevard 15, Sofia 1000

Keywords:

Ammonites, Cenomanian, Bulgaria

Abstract

The type section of the Sanandinovo Formation between the villages of Sanandinovo and Novachene in northern Bulgaria has yielded numerous ammonites from packages 7-9 of the sequence recognised by previous authors. The assemblage is: Tetragonites subtimotheanus WIEDMANN, 1962, Puzosia (Puzosia) mayoriana (D.ORBIGNY, 1841), Acanthoceras jukesbrownei (SPATH, 1926), Protacanthoceras tuberculatum tuberculatum THOMEL, 1972, Calycoceras (Newboldiceras) asiaticum asiaticum (JIMBO, 1894), C. (N.) asiaticum spinosum (KOSSMAT, 1897), C. (N.) planecostatum (KOSSMAT, 1897), Calycoceras (Proeucalycoceras) picteti WRIGHT & KENNEDY, 1990, and Scaphites equalis J. SOWERBY, 1813. The assemblage indicates the upper Middle Cenomanian Acanthoceras jukesbrownei Zone of Western Europe. We have seen no evidence for either older or younger Cenomanian ammonite zones from the sequence.

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Published

2004-09-01

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Articles