Article (Scientific journals)
Diverse assemblages of Mid Devonian megaspores from Libya
Steemans, Philippe; Breuer, Pierre; Petus, Elodie et al.
2011In Review of Palaeobotany and Palynology, 165, p. 154-174
Peer Reviewed verified by ORBi
 

Files


Full Text
Steemans et al 2011.pdf
Publisher postprint (10.4 MB)
Request a copy
Annexes
Présentation Lisbonne.ppt
Publisher postprint (200 MB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Abstract :
[en] A restudy of Devonian palynological assemblages of samples from the A1-69 borehole, drilled in the Ghadamis Basin, western Libya, North Africa has led to the discovery of numerous well-preserved megaspores amongst abundant miospores, rare acritarchs and rare chitinozoans. Thirteen samples from base to top, 1496 ft (456 m) up to 965 ft (294 m), contain the richest Devonian megaspore assemblages from northwestern Gondwana. The section is dated by a rich diverse miospore assemblage indicating the presence of the upper part of the AD pre-Lem Biozone up to the lower part of the TCo Oppel Zone, ranging from a latest Eifelian or earliest Givetian age up to a latest Givetian or an earliest Frasnian age. Seventeen megaspore taxa have been identified. Among them, two new species (Biharisporites lugardonii and Lagenicula milleri) and four new varieties (Corystisporites acutispinosus var. acutispinosus and var. bullatus, Heliotriletes longispinosus var. longispinosus and var. radiatus) are described. One new possible megaspore species is also described: Verruciretusispora labiosa sp. nov. One core sample (1293 ft, 394 m) contains several specimens of very large megaspores (ca. 1 mm), the largest known from Devonian localities (except for one specimen observed in the Givetian from Belgium). Among the 17 megaspore taxa from Libya, 6 are present on the Euramerican Continent. This observation is in accordance with previous palynological conclusions that favour the absence of palaeogeographic barriers between the Euramerican and Gondwanan continents that are suggested to be grouped together in a “Pre-Pangea” land mass.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Steemans, Philippe  ;  Université de Liège - ULiège > Département de géologie > Paléobotanique - Paléopalynologie - Micropaléontologie (PPM)
Breuer, Pierre
Petus, Elodie ;  Université de Liège - ULiège > Département de géologie > Paléobotanique - Paléopalynologie - Micropaléontologie (PPM)
Prestianni, Cyrille  ;  Université de Liège - ULiège > Département de géologie > Paléobotanique - Paléopalynologie - Micropaléontologie (PPM)
Ville de Goyet, Frédéric de
Gerrienne, Philippe ;  Université de Liège - ULiège > Département de géologie > Paléobotanique - Paléopalynologie - Micropaléontologie (PPM)
Language :
English
Title :
Diverse assemblages of Mid Devonian megaspores from Libya
Publication date :
May 2011
Journal title :
Review of Palaeobotany and Palynology
ISSN :
0034-6667
eISSN :
1879-0615
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
165
Pages :
154-174
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 31 May 2011

Statistics


Number of views
102 (15 by ULiège)
Number of downloads
5 (1 by ULiège)

Scopus citations®
 
10
Scopus citations®
without self-citations
9
OpenCitations
 
11

Bibliography


Similar publications



Contact ORBi