Foraminiferal evidence for Cenomanian sequence stratigraphy and palaeoceanography of the Boulonnais (Paris Basin, northern France)

1999 ◽  
Vol 153 (1-4) ◽  
pp. 41-70 ◽  
Author(s):  
Kai-Uwe Gräfe
Keyword(s):  
Sequence Stratigraphy ◽  
Paris Basin ◽  
Northern France

scholarly journals New insights on the Late Paleocene-Early Eocene Dinoflagellate cyst zonation for the Paris and Dieppe Basins

2021 ◽  
Author(s):  
Alina I. Iakovleva ◽  
Florence Quesnel ◽  
Christian Dupuis
Keyword(s):  
Early Eocene ◽  
Paris Basin ◽  
Dinoflagellate Cyst ◽  
Northern France ◽  
Late Paleocene ◽  
Thermal Maximum ◽  
Stratigraphic Interval

The Anglo-Belgo-Paris Basin, historical cradle of the Paleogene stratigraphy since the XVIIIth century, is known by the presence of very specific so-called “Sparnacian” deposits (very diverse and laterally highly variable, predominantly lagoonal to terrestrial facies), which encompass the short stratigraphic interval of the Paleocene-Eocene Thermal Maximum (PETM). Due to the insufficient paleontological record, the “Sparnacian” succession of the Paris and Dieppe-Hampshire Basins still needs a robust chronostratigraphic correlation with other Paleogene records worldwide. In order to refine the stratigraphy of the Thanetian-Lower Ypresian succession in northern France a number of cores and outcrop sections have been investigated palynologically. As a result, an updated version of the Dinoflagellate cyst zonation for the Paris and Dieppe Basins is proposed and contains six new or revised Biozones for this stratigraphical interval: Alisocysta margarita, Apectodinium hyperacanthum, Apectodinium-extreme acme, Biconidinium longissimum-acme, Dracodinium astra, and Axiodinium lunare/Stenodinium meckelfeldense. Based on combined bio-, litho- and chemostratigraphic data, it appears that the dinocyst assemblages, corresponding to the PETM event interval (“Sparnacian” deposits, Soissonnais and upper Mortemer Formations with the most negative 13δCorg values between -27 and -32 ‰ PDB), are characterized by an extreme acme of Apectodinium spp. (70-98%) in both basins, sometimes alternating with an extreme acme of a few gonyaulacoid groups in the Dieppe Basin. Dinocyst assemblages from the PETM interval contain a significant number of atypical, longer specimens of Apectodinium parvum, which could represent an ecological onshore substitute of species Axiodinium augustum in the Paris and Dieppe-Hampshire Basins. The establishment of a new Biconidinium longissimum-acme Zone suggests the absence of an important stratigraphical hiatus previously inferred for the Paris Basin.

scholarly journals Dinocyst distributions and stratigraphy of two Cenomanian–Turonian boundary (Upper Cretaceous) sections from the western Anglo-Paris Basin

1995 ◽  
Vol 14 (2) ◽  
pp. 97-105 ◽  
Author(s):  
Bruce A. Tocher ◽  
Ian Jarvis
Keyword(s):  
Upper Cretaceous ◽  
Paris Basin ◽  
Dinoflagellate Cyst ◽  
Northern France ◽  
Abundance And Diversity

Abstract. The dinoflagellate cyst distributions and stratigraphies of two representative Cenomanian/Turonian (C/T) boundary sections from the Maine and Normandy regions of northern France are described. Siliciclastic-rich sediments which characterize the Upper Cenomanian in Maine, contrast with the coeval nodular chalk and hardground lithofacies of Normandy. Both areas display a transition to marly chalks in the Lower Turonian. Dinocyst assemblages are characterized by low diversities (38 taxa) and low overall abundances, and relatively few stratigraphically significant species. The continued occurrence of Epelidosphaeridia spinosa (Cookson & Hughes) Davey in the Upper Cenomanian of Maine is noted. Results are compared and contrasted with those from coeval sections elsewhere in the Anglo-Paris Basin. A major decline in cyst abundance and diversity is typical of the C/T boundary interval, which is characterized by a dominance of tolerant cosmopolitan forms such as Circulodinium distinctum (Deflandre & Cookson) Jansonius, Hystrichosphaeridium bowerbankii Davey & Williams, Oligosphaeridium complex (White) Davey & Williams, Odontochitina costata Alberti; emend. Clarke & Verdier and O. operculata (O. Wetzel) Deflandre & Cookson.

Inversion tectonics at the northern margin of the Paris basin (northern France): new evidence from seismic profiles and boreholes interpolation in the Artois area

2010 ◽  
Vol 181 (5) ◽  
pp. 429-442 ◽  
Author(s):  
Bruno Minguely ◽  
Olivier Averbuch ◽  
Marie Patin ◽  
David Rolin ◽  
Franck Hanot ◽  
...  
Keyword(s):  
Middle Eocene ◽  
Paris Basin ◽  
Inversion Process ◽  
Seismic Profiles ◽  
Localized Deformation ◽  
Borehole Data ◽  
Northern Margin ◽  
Northern France ◽  
Thrust Front ◽  
Northern Border

AbstractA synthesis of existing borehole data and seismic profiles has been conducted in the Artois area (northern France), along the northern border of the Paris basin, in order to explore the possible control exerted at depth by the Upper Carboniferous Variscan thrust front on the distribution of Late Paleozoic-Mesozoic depositional centers and their subsequent uplift in Tertiary times. Such control was demonstrated recently in the Weald-Boulonnais basin (Eastern Channel area) that forms the western prolongation of the area under study but was so far poorly constrained in the Artois area. Presented data provide evidence for the topography of the Artois hills and the altitude of sedimentary layers to be controlled by the activity of a network of relaying WNW-ESE striking faults inducing the systematic uplift of the southern fault blocks. Those steeply S-dipping faults branch downward onto the ramp of the Variscan thrusts forming listric faults that locally limit to the north buried half-graben structures, filled with fan-shaped fluviatile Stephanian-Permian deposits. Such clear syn-rift geometry shows that the ramp of the main Variscan frontal thrust (the Midi thrust) has been reactivated as a normal fault in Stephanian-Permian times thus forming a very demonstrative example of a negative inversion process. The reverse offset of the transgressive Middle Cretaceous-Lower Eocene layers covering unconformably the Paleozoic substratum argue for a Tertiary (Middle Eocene-Late Oligocene?) contractional reactivation of the fault network thereby documenting a repeated inversion process along the Artois Variscan thrust front. The Variscan frontal thrust zone is thus shown here to represent a prominent crustal-scale mechanical discontinuity that localized deformation in the Artois-Boulonnais area since Upper Paleozoic times.

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