Reference : Diverse assemblages of Mid Devonian megaspores from Libya
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/92041
Diverse assemblages of Mid Devonian megaspores from Libya
English
Steemans, Philippe mailto [Université de Liège - ULg > Département de géologie > Paléobotanique - Paléopalynologie - Micropaléontologie (PPM) >]
Breuer, Pierre [> >]
Petus, Elodie mailto [Université de Liège - ULg > Département de géologie > Paléobotanique - Paléopalynologie - Micropaléontologie (PPM) >]
Prestianni, Cyrille mailto [Université de Liège - ULg > Département de géologie > Paléobotanique - Paléopalynologie - Micropaléontologie (PPM) >]
Ville de Goyet, Frédéric de []
Gerrienne, Philippe mailto [Université de Liège - ULg > Département de géologie > Paléobotanique - Paléopalynologie - Micropaléontologie (PPM) >]
May-2011
Review of Palaeobotany and Palynology
Elsevier Science
165
154-174
Yes (verified by ORBi)
International
0034-6667
Amsterdam
The Netherlands
[en] [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.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/92041

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