New advances in the stratigraphy and geochemistry of the German Turonian (Late Cretaceous) tephro- stratigraphic framework

• Autorzy: Wiese F. , Wood Ch. J. , Wray D. S.
• Języki publikacji: EN

Abstrakty

EN

The lowest of the five bentonites in the German Turonian tephrostratigraphic framework, T[C], can be correlated for the first time from the Rotplaner (red limestone) standard section in the Sohlde-Loges Quarry (Lower Saxony) to highly condensed, near-swell successions of the nearby Woltwiesche Quarry and the Hoppenstedt Quarry (Saxony-Anhalt). A second bentonite, T[C2], only recently recognised at Sohlde-Loges, is now identified at Woltwiesche and in the distal/expanded white limestone successions of the Salzgitter-Salder Quarry and the Floteberg road-cutting (both Lower Saxony). T[C2] can easily be located a short distance above a major lithofacies change (herein termed the Basal Upper Turonian Facies Turnover), making it an isochronous marker permitting correlation between condensed near-swell and expanded basinal sections. On this basis, a bentonite, previously identified as T[C] at Hoppenstedt must be re-assigned as T[C2].Examination of the major, trace, and rare-earth element (REE) data of all the five bentonites identified in Lower Saxony and Saxony-Anhalt shows that it is possible to discriminate between them to some extent. Bentonites TC[ ]and T[C2] are geochemically similar and separable from T[D], which is itself distinct from T[E] and T[F].

Słowa kluczowe

EN

bentonite; Lower Saxony; rare earth elements (REE); Saxony-Anhalt; trace elements; tuff; Turonian; Upper Cretaceous

• Wydawca: Faculty of Geology of the University of Warsaw ; Komitet Nauk Geologicznych PAN
• Czasopismo: Acta Geologica Polonica
• Rocznik: 2004
• Tom: Vol. 54, no. 4
• Strony: 657--671
• Opis fizyczny: Bibliogr. 25 poz., rys., wykr.

Twórcy

autor

Wiese F.

• Fachrichtung Paläontologie, Freie Universität Berlin, Malteserstrasse 74-100, D-12249 Berlin, Germany

autor

Wood Ch. J.

• Scops Geological Services Ltd., 31 Periton Lane, Minehead, Somerset, TA24 8AQ, UK

autor

Wray D. S.

• Department of Earth & Environmental Sciences, The University of Greenwich, Pembroke, Chatham Maritime, Kent, ME4 4TB, UK

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