Inoceramid bivalves at the Turonian/Coniacian boundary: biostratigraphy, events and diversity trend

• Autorzy: Walaszczyk, I.
• Języki publikacji: EN

Abstrakty

EN

The Turonian/Coniacian boundary marks one of the main turnover levels in the Late Cretaceous history of the inoceramid bivalves. The change from the Mytiloides-dominated Late Turonian fauna to the Cremnoceramus-dominated Early Coniacian fauna was a dramatic experience for the group, with a series of successive assemblages interrupted by their almost total elimination, and with intervening short-term expansions of the bivalve Didymotis. The taxonomic diversity dropped to a few species per interval calculated and marks the lowest level in their Late Cretaceous history, comparable to the trough around the Cenomanian/Turonian boundary. The whole change must have taken no longer than a quarter of a milion years and its duration could have been as short as some tens of thousand years

Słowa kluczowe

EN

Bio- and Event stratigraphy; Coniacian; inoceramids; Taxonomic diversity; Turonian

• Czasopismo: Acta Geologica Polonica
• Rocznik: 2000
• Tom: Vol. 50, no. 4
• Strony: 421-430
• Opis fizyczny: Bibliogr. 60 poz.

Twórcy

autor

Walaszczyk, I.

• Institute of Geology, University of Warsaw, Al. Żwirki i Wigyry 93, PL-02-089 Warszawa, Poland