Biostratigraphical correlation of the Campanian–Maastrichtian boundary: Lägerdorf–Hemmoor (northwestern Germany), DSDP Sites 548A, 549 and 551 (eastern North Atlantic) with palaeobiogeographical and palaeoceanographical implications.

Schönfeld, Joachim and Burnett, J. (1991) Biostratigraphical correlation of the Campanian–Maastrichtian boundary: Lägerdorf–Hemmoor (northwestern Germany), DSDP Sites 548A, 549 and 551 (eastern North Atlantic) with palaeobiogeographical and palaeoceanographical implications. Geological Magazine, 128 (5). pp. 479-503. DOI 10.1017/S001675680001863X.

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Abstract

A correlation of the Campanian–Maastrichtian boundary is attempted using foraminiferal and nannoplankton data from two areas: the eastern North Atlantic and northwestern Germany. The Boreal benthic and Tethyan planktonic foraminiferal zonation schemes are applied to Site 548A, where both foraminiferal groups occur frequently. A direct comparison of both biozonations reveals that the base of the Maastrichtian, according to planktonic foraminifers, has to be placed in the Upper Campanian of the Boreal benthic foraminiferal biozonation, which concurs with the nannoplankton results. The Tethyan Middle and Upper Maastrichtian are probably equivalent to the Upper Maastrichtian in the Boreal sense. The bases of the Maastrichtian substages are thus diachronous between the Boreal and Tethyan realms. Palaeotemperatures (which were estimated using the oxygen isotopic composition of the Goban Spur chalks) indicate, in combination with palaeowind directions, that the faunal and floral distribution pattern recorded is the result of a stable, warm water outflow from the northwest European epicontinental seas through the Channel area to the Celtic Shelf sea and Goban Spur. This mechanism appears to have been a dominant separating factor of the Boreal and Tethyan bioprovinces on the western European Shelf.

Document Type: Article
Keywords: Lägerdorf-Hemmoor, palaeobiogeography, palaeoocenography, biostratigraphy, Cretaceous, Campanian-Maastrichtian, DSDP Sites 548A, 549, 551
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1017/S001675680001863X
ISSN: 0016-7568
Projects: DSDP
Date Deposited: 23 Mar 2016 07:51
Last Modified: 23 Mar 2016 07:51
URI: http://oceanrep.geomar.de/id/eprint/31785

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