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Titolo:
The messaoudensis-trifidum acritarch assemblage (Ordovician : late Tremadoc-early Arenig) of the Barriga Shale Formation, Sierra Morena (SW-Spain)
Autore:
Servais, T; Mette, W;
Indirizzi:
USTL, Lab Paleontol, CNRS, UPRESA 8014, F-59655 Villeneuve Dascq, France USTL Villeneuve Dascq France F-59655 4, F-59655 Villeneuve Dascq, France Innsbruck Univ, Inst Geol & Palaeontol, A-6020 Innsbruck, Austria Innsbruck Univ Innsbruck Austria A-6020 ontol, A-6020 Innsbruck, Austria
Titolo Testata:
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
fascicolo: 1-3, volume: 113, anno: 2000,
pagine: 145 - 163
SICI:
0034-6667(200012)113:1-3<145:TMAA(:>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
LAKE DISTRICT; SEDIMENTS;
Keywords:
acritarchs; biostratigraphy; palaeobiogeography; Ordovician; Spain;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
60
Recensione:
Indirizzi per estratti:
Indirizzo: Servais, T USTL, Lab Paleontol, CNRS, UPRESA 8014, SN5, F-59655 VilleneuveDascq, France USTL SN5 Villeneuve Dascq France F-59655 leneuve Dascq, France
Citazione:
T. Servais e W. Mette, "The messaoudensis-trifidum acritarch assemblage (Ordovician : late Tremadoc-early Arenig) of the Barriga Shale Formation, Sierra Morena (SW-Spain)", REV PALAE P, 113(1-3), 2000, pp. 145-163

Abstract

The "messaoudensis-trifidum acritarch assemblage" is currently considered to be characteristic of latest Tremadoc-earliest Arenig cold-water environments on the periphery of Gondwana, at high latitudes in the southern hemisphere. An integrated biostratigraphical study on both acritarchs and graptolites was until now only available for localities in northwest England. Reinvestigation of the "messaoudensis-trifidum acritarch assemblage" from the Barriga Formation (Sierra Morena, southwestern Spain), which contains some graptolite horizons that can be attributed to the latest Tremadoc (pre-phyllograptoides and pre-approximatus graptolite biozones), strengthens the biostratigraphical potential of the "messaoudensis-trifidum assemblage", and the importance of some of the acritarch taxa recovered from these levels. It is concluded that the acritarch genera Coryphidium Vavrdova 1972, Peteinosphaeridium Staplin et al., 1965 emend. Playford et al., 1995, Striatotheca, Burmann, 1970, and the Veryhachium lairdii group (rectangular veryhachiids)appear in the latest Tremadoc, and should not be considered as indicators of the base of the Arenig, as previously suggested. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 03/07/20 alle ore 16:23:44