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.

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 Organic-walled dinoflagellate cyst records from a prospective Turonian – Coniacian (Upper Cretaceous) GSSP, Słupia Nadbrzeżna, Poland

2016 ◽  
Vol 65 ◽  
pp. 17-24 ◽  
Author(s):  
Kate Olde ◽  
Ian Jarvis ◽  
Martin Pearce ◽  
Ireneusz Walaszczyk ◽  
Bruce Tocher
Keyword(s):  
Upper Cretaceous ◽  
Dinoflagellate Cyst

scholarly journals Reconstruction of the Upper Cretaceous chalks removed by dissolution during the Cenozoic in the western Paris Basin

1999 ◽  
Vol 88 (3) ◽  
pp. 467-474 ◽  
Author(s):  
B. Laignel ◽  
F. Quesnel ◽  
R. Meyer ◽  
C. Bourdillon
Keyword(s):  
Upper Cretaceous ◽  
Paris Basin

Dinoflagellate cyst biostratigraphy of the Coniacian–Santonian (Upper Cretaceous): New data from the English Chalk

2008 ◽  
Vol 150 (1-4) ◽  
pp. 59-96 ◽  
Author(s):  
Iain M. Prince ◽  
Ian Jarvis ◽  
Martin A. Pearce ◽  
Bruce A. Tocher
Keyword(s):  
Upper Cretaceous ◽  
Dinoflagellate Cyst

Distribution, abundance and diversity of modern dinoflagellate cyst assemblages from southern Chile (43–54° S)

2008 ◽  
Vol 51 (5) ◽  
Author(s):  
Catharina Alves-de-Souza ◽  
Daniel Varela ◽  
Florencia Navarrete ◽  
Pamela Fernández ◽  
Pablo Leal
Keyword(s):  
Southern Chile ◽  
Dinoflagellate Cyst ◽  
Abundance And Diversity

scholarly journals The Turonian-Coniacian stage boundary in Lower Saxony (Germany) and adjacent areas: the Salzgitter-Salder Quarry as a proposed international standard section

1984 ◽  
Vol 33 ◽  
pp. 225-238
Author(s):  
Christopher J. Wood ◽  
Gundolf Ernst ◽  
Gabriele Rasemann
Keyword(s):  
Major Change ◽  
Paris Basin ◽  
Northern Spain ◽  
Lower Saxony ◽  
Mine Shaft ◽  
Nw Germany ◽  
International Standard ◽  
Range Correlation ◽  
Standard Section ◽  
Abundance And Diversity

The litho- and biostratigraphy of the Turonian-Coniacian boundary succession of the Salzgitter-Salder limestone quarry (Lower Saxony) is described in the context of a proposed international standard section. Compared with other sections, Salder provides a thick continuous succession unaffected by condensation and/or non-sequences and with an abundance and diversity of macrofossils, notably inoceramids. The litho-, tephro-, and ecoevents which can be used to subdivide the sequence are described, from the base of the traditional 'Scaphiten-Schichten' up to the contact with the Emscher Marl. The events are ideal marker horizons for long-range correlation across NW Germany as far as England. The base of the Coniacian is taken at the entry-datum of Cremnoceramus? waltersdorfensis hannovrensis, coincident with the upper of two Didymotis events. This event is immediately followed by a major change in the inoceramid assemblages with the entry of Cremnoceramus? rotundatus. This latter change coincides with the traditional German Mittel-Oberturon boundary. The boundary problem is discussed in the context of ammonites, echinoids, foraminifera, and nannofossils. The inoceramid assemblages beneath the boundary have strong affinities with those of the uppermost Turonian Prionocyclus quadratus Zone in N. America; The boundary in Lower Saxony falls in the upper part of a distinctive lithostratigraphical unit of alternating marls and marly limestones (the so-called 'Grauweisse Wechselfolge'), intercalated between two predominantly limestone units. The geographical distribution and fades-differentiation of the 'Grauweisse Wechselfolge' in correlative sections of Lower Saxony is examined. The unit.is the key to the recognition of the restricted boundary succession in sections where stratigraphical data are inadequate or lacking, e.g. the flooded quarries of Liineburg and the Staffhorst mine-shaft. The probable equivalent of the 'Grauweisse Wechselfolge' in northern England is discussed, and additional comments are made on southern England, and northern Spain. The Copenhagen Symposium (1983) proposals for recognising the base of the Coniacian are critically reviewed. The entry of C.? waltersdorfensis hannovrensis is demonstrated to be the only practicable criterion in many areas. The base of the"Senonian, as defined in the Anglo-Paris Basin, is suggested to equate with the base of the 'Grauweisse Wechselfolge' and thus to be of late Turonian age.

scholarly journals Upper Cretaceous dinoflagellate cyst stratigraphy, onshore West Greenland

1996 ◽  
Vol 170 ◽  
pp. 1-104
Author(s):  
H Nøhr-Hansen
Keyword(s):  
Upper Cretaceous ◽  
Geological Survey ◽  
West Greenland ◽  
Dinoflagellate Cyst ◽  
Sequence Stratigraphic ◽  
Stratigraphic Analysis

This study is part of the Geological Survey of Greenland (GGU) project 'Sequence stratigraphic analysis of the Cretaceous sediments in West Greenland', and aims to establish a palynostratigraphy for the Disko-Nuussuaq- Svartenhuk Halvø area in West Greenland.

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