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Titolo:
Ordovician chitinozoan biozonation of the Brabant Massif, Belgium
Autore:
Samuelsson, J; Verniers, J;
Indirizzi:
State Univ Ghent, Dept Geol & Pedol, Res Unit Palaeontol, B-9000 Ghent, Belgium State Univ Ghent Ghent Belgium B-9000 Palaeontol, B-9000 Ghent, Belgium
Titolo Testata:
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
fascicolo: 1-3, volume: 113, anno: 2000,
pagine: 105 - 129
SICI:
0034-6667(200012)113:1-3<105:OCBOTB>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
BALTOSCANDIA; STRATIGRAPHY; MAGMATISM; AVALONIA; GONDWANA; BRITAIN;
Keywords:
Avalonia; biostratigraphy; Brabant Massif; chitinozoan; Ordovician; palaeobiogeography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
58
Recensione:
Indirizzi per estratti:
Indirizzo: Samuelsson, J State Univ Ghent, Dept Geol & Pedol, Res Unit Palaeontol, Krijgslaan 28-S8, B-9000 Ghent, Belgium State Univ Ghent Krijgslaan 28-S8 Ghent Belgium B-9000 gium
Citazione:
J. Samuelsson e J. Verniers, "Ordovician chitinozoan biozonation of the Brabant Massif, Belgium", REV PALAE P, 113(1-3), 2000, pp. 105-129

Abstract

Chitinozoans from seven Ordovician units (Abbaye de Villers, Tribotte, Rigenee, Ittre, Bornival, and Brutia formations and a new unnamed unit, here provisionally called the Asquempont unit) belonging to the mainly concealed Brabant Massif, Belgium are described herein. Fifty-six samples were taken from rocks cropping out at the south-eastern rim of the massif in the Orneau, Dyle-Thyle and Senne-Sennette valleys. Microfossil preservation is moderate to poor, and the chitinozoans occur in low numbers. Taxonomically, the recovered chitinozoans are distributed into 29 taxa, some placed under opennomenclature. Together with earlier published graptolite and acritarch data, the analysis of the chitinozoan assemblages resulted in an improved chronostratigraphy of the investigated formations. We propose a local chitinozoan biozonation with 11 zones for the Brabant Massif. The oldest investigated units yielded chitinozoans typical for North Gondwana, and younger units (starting in the middle Caradoc), yielded some tars also common in Baltica. As the Brabant Massif formed part of the microcontinent Avalonia, the chitinozoan assemblages recovered from the massif support the inferred driftingof Avalonia from high latitudes towards middle latitudes in the Ordovicianas was suggested earlier. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/08/20 alle ore 20:09:19