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Miospore assemblages from the Silurian-Devonian boundary, in borehole A1-61, Ghadamis Basin, Libya
Rubinstein, C.; Steemans, Philippe
2002In Review of Palaeobotany and Palynology, 118 (1-avr Sp. Iss. SI), p. 397-421
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Keywords :
miospores; palynology; Silurian; Devonian; palaeogeography; biostratigraphy
Abstract :
[en] Well preserved and diversified miospore assemblages have been recorded from a relatively continuous sequence in borehole A1-61 which spans the Silurian-Devonian boundary in the northwestern part of the Ghadamis Basin, Libya. The sequence is represented by early Devonian Lochkovian beds of the Tadrart Formation that transgress onto the Silurian Ludlow-Pridoli beds of the upper part of the 'Alternances Argilo-greseuses' Formation. The present work demonstrates a succession of miospore assemblages from closely sampled layers that have been stratigraphically dated as Ludlow-middle Pridoli and early Lochkovian by chitinozoans and acritarchs. Over 80 species of cryptospores and trilete spores have been identified. Modified detailed morphological interpretations are given. The miospore assemblages are correlated with miospore zonation schemes established for the type sequences of the Welsh Borderland, and those previously described from Libya. Early occurrences of some species as Streelispora newportensis on the western Gondwana plate, are put forward by comparison with the Old Red Sandstone continent. Phytogeographic and palaeobotanic implications based on these observations are discussed. (C) 2002 Elsevier Science B.V. All rights reserved.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Earth sciences & physical geography
Author, co-author :
Rubinstein, C.
Steemans, Philippe  ;  Université de Liège - ULiège > Département de géologie > Paléobotanique - Paléopalynologie - Micropaléontologie (PPM)
Language :
English
Title :
Miospore assemblages from the Silurian-Devonian boundary, in borehole A1-61, Ghadamis Basin, Libya
Publication date :
April 2002
Event name :
Advances in Palaeozoic palynology
Event organizer :
Palynologists and plant micropalaeontologists of Belgium
Event place :
Villeneuve d'Ascq, France
Event date :
11 December 2001
Audience :
International
Journal title :
Review of Palaeobotany and Palynology
ISSN :
0034-6667
eISSN :
1879-0615
Publisher :
Elsevier Science Bv, Amsterdam, Netherlands
Volume :
118
Issue :
1-avr Sp. Iss. SI
Pages :
397-421
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 27 October 2010

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