Lefort Apolline

Responsable d’étude Stratigraphie, Microfacies et Jurassique


TEL +41 (0)32 420 84 61

 

mail

apolline.lefort@jura.ch

 

FORMATION / CHARGES

 

Master in Palaeontology (Paris Vi-MNHN)PhD in Geosciences (Nancy, France - Stratigraphy and micropalaeontology – Jurassic)

Member of APF, GFEJ, SGF

 

FONCTION

 

I am responsible for studying and organising the stratigraphic data obtained during the research excavations undertaken between 2000 and 2012 ahead of the construction of the A16. During this period, more than 100 profiles were documented in the northern part of the Swiss Jura and these will be correlated and compared with published work. Samples were taken at every site, so I am required to analyse and interpret hundreds of thin sections and assemblages of microfossils recovered by sieving and sorting. I must also write at least two catalogues that reunite all the lithostratigraphic (field descriptions, thin sections and chemical analyses) and biostratigraphical data (ammonites, palynology, ostracods, foraminifera, etc.).

 

RECHERCHE / SPÉCIALITÉ

 

Integrated stratigraphy : biostrati-graphic correlations and palaeoenvi-ronmental reconstructions, requiring the interpretation and comparison of geochemical, palaeontological and geological data. Local correlations within the Jura will be compared with established international sequences in terms of sequential stratigraphy.

 

Jurassic foraminifera: identification of Jurassic benthic foraminifera (Lituolidae, Textularidae etc.) is an essential tool for palaeoenvironmental reconstructions and biostratigraphy.

 

Climatic, palaeogeographic and palaeobiological conditions linked with the Late Jurassic carbonate platforms are relatively well known, but many questions remain. In particular, how to correlate the boreal and tethysian faunas with preexisting stratigraphic charts. Within these Western European platform environments, what clues can help us to define a GSSP for the Oxfordian/Kimmeridgian boundary?

 

COLLABORATIONS

 

Laboratory GeoRessources, Université de Lorraine, France-Section Géologie et Paléontologie, Université de Genève, Suisse

 

SÉLECTION DES PUBLICATIONS

 

Lefort A., Hautevelle Y., Lathuilière B. & Huault V., 2012. Molecular organic geochemistry of a proposed stratotype for the Oxfordian/Kimmeridgian boundary (Isle of Skye, Scotland). Geological Magazine 149 (5), 857-874.

Lefort, A., Lathuilière, B., Carpentier, C. and Huault, V., 2012. Erratum to: Microfossil assemblages and relative sea-level fluctuations in a lagoon at the Oxfordian/Kimmeridgian boundary (Upper Jurassic) in the eastern part of the Paris Basin. Facies, 58(1): 167-167.

Lefort A., Lathuilière B, Carpentier C. & Huault V., 2011. Microfossil assemblages and relative sea-level fluctuations in a lagoon at the Oxfordian/Kimmeridgian boundary (Upper Jurassic) in the eastern part of the Paris Basin. Facies 57, 649-662.

Valet J.-P., Moreno E., Bassinot F., Johannes L., Dewilde F., Vilaça T., Lefort A., Venec Peyre M.-T., 2011. Isolating climatic and paleomagnetic imbricated signals in two marine cores. Geochemistry Geophysics Geosystems 12.

Lefort A. & Lathuilière B., 2010. Les collections paléontologiques à Nancy (et en Lorraine). Journal de l’APF 58.

 

SUBMITTED

 

Lefort, A., Gretz, M., Martini, R. and Sandoz, M. Microfacies and paleoenvironment of the Coral Limestones unit on the kimmeridgian Jura platform (Reuchenette Formation, Upper Jurassic). Swiss Journal of Geosciences

Lefort, A., Lathuilière, B., Carpentier, C.d. and Huault, V. Carbonate crisis at the Oxfordian/Kimmeridgian boundary (Upper Jurassic) in the Eastern part of the Paris Basin (France). Palaeogeography, Palaeoclimatology, Palaeoecology


UNPUBLISHED


Lefort A., 2011. La limite Oxfordien-Kimméridgien (Jurassique supérieur): stratigraphie et paléoen- vironnements dans les domaines téthysien (Est et Sud du bassin de Paris, France) et boréal (Ile de Skye, Écosse). PhD thesis. Supervisors: B. Lathuilière & V. Huault.(http://tel.archives-ouvertes.fr/tel-00597516)

Lefort A., 2006. Foraminifères planctoniques et susceptibilité magnétique, traceurs de la variabilité climatique dans les détroits indonésiens. Masters thesis. Supervisors: M.-T. Vénec-Peyré & E. Moreno.

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