Skip to Main content Skip to Navigation
Journal articles

DESCRIPTION AND MICROSCALE ANALYSIS OF SOME ENIGMATIC PALYNOMORPHS FROM THE MIDDLE DEVONIAN (GIVETIAN) OF LIBYA

Philippe Steemans 1 Emmanuelle J. Javaux 1 Pierre Breuer 2 Alain Le Hérissé 3, 4 Craig P. Marshall 5 Frédéric de Ville de Goyet 6
1 NFSR Research associate
2 Geological Technical services division
3 LDO - Domaines Océaniques
4 UEB - Université européenne de Bretagne - European University of Brittany
5 Department of Geology
6 Rue Rioul 46
Abstract : Large acritarchs were recovered from the Awaynat Wanin II Formation in the A1-69 borehole, western Libya at 394.4 m. This sample has been dated by acritarchs and spores as Givetian (Middle Devonian). Two species of acanthomorph acritarchs were recovered that are unusually large for the Paleozoic. The first type, represented by a single specimen, is a new occurrence of a previously described but unnamed form from the Middle Devonian of the Sahara. The second type, which is more abundant, is named as Vanguestainidium cucurbitulum gen. et sp. nov. Biogeochemical analysis using infrared microspectroscopy shows that the wall composition of this new taxon is close to algaenans isolated from the green alga Botryococcus braunii Kützing 1849 although these forms are not morphologically similar. The presence of well-preserved fragile palynomorphs, abundant terrestrially-derived palynomorphs including large megaspores, and rare marine palynomorphs suggests deposition in a low-energy nearshore environment such as a coastal swamp.
Keywords : acritarchs spores taxonomy microscale analysis Middle Devonian (Givetian) Libya
Document type :
Journal articles
Complete list of metadata
https://hal-insu.archives-ouvertes.fr/insu-00543834
Contributor : Adminhal Univbrestbu Connect in order to contact the contributor
Submitted on : Monday, December 6, 2010 - 5:20:09 PM
Last modification on : Monday, October 11, 2021 - 2:22:48 PM

Identifiers

Collections

INSU | CNRS | UNIV-BREST | LGO | CMM

Citation

Philippe Steemans, Emmanuelle J. Javaux, Pierre Breuer, Alain Le Hérissé, Craig P. Marshall, et al.. DESCRIPTION AND MICROSCALE ANALYSIS OF SOME ENIGMATIC PALYNOMORPHS FROM THE MIDDLE DEVONIAN (GIVETIAN) OF LIBYA. Palynology, Taylor & Francis, 2009, 33, pp.101-112. ⟨10.2113/gspalynol.33.1.101⟩. ⟨insu-00543834⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

154