Palaeoecology and biostratigraphy of the Paleogene Foraminifera from the southern Upper Rhine Graben and the influence of reworked planktonic Foraminifera

Pirkenseer, Claudius; Spezzaferri, Silvia; Berger, Jean-Pierre

doi:10.1127/pala/293/2010/1

Cited by 9 publications

(14 citation statements)

References 19 publications

(39 reference statements)

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“…Therefore, conceptually, the Malm aquifer can be considered as a fresh-water boundary leading to progressive out-diffusion of salinity from the underlying, largely clay-rich sequence. While NaCl/KCl salts were deposited in the Rhine Graben during the Eocene, there is no evidence of marine environments at that time in the Mont Terri region (Pirkenseer et al 2010). In the Oligocene, marine incursions of limited duration may have occurred from the Rhine Graben, even though the Mont Terri region was located along the southern shoreline (Picot et al 2008;Pirkenseer et al 2010Pirkenseer et al , 2011Pirkenseer et al , 2013.…”

Section: Palaeogene (66-23 Ma)mentioning

confidence: 99%

“…While NaCl/KCl salts were deposited in the Rhine Graben during the Eocene, there is no evidence of marine environments at that time in the Mont Terri region (Pirkenseer et al 2010). In the Oligocene, marine incursions of limited duration may have occurred from the Rhine Graben, even though the Mont Terri region was located along the southern shoreline (Picot et al 2008;Pirkenseer et al 2010Pirkenseer et al , 2011Pirkenseer et al , 2013. The possible presence of short brackish or marine stages does not change the fact that for most of the Palaeogene, the region was exposed to continental conditions.…”

Section: Palaeogene (66-23 Ma)mentioning

confidence: 99%

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Pore-water evolution and solute-transport mechanisms in Opalinus Clay at Mont Terri and Mont Russelin (Canton Jura, Switzerland)

Mazurek

Haller

2017

Swiss J Geosci

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Data pertinent to pore-water composition in Opalinus Clay in the Mont Terri and Mont Russelin anticlines have been collected over the last 20 years from longterm in situ pore-water sampling in dedicated boreholes, from laboratory analyses on drillcores and from the geochemical characteristics of vein infills. Together with independent knowledge on regional geology, an attempt is made here to constrain the geochemical evolution of the pore-waters. Following basin inversion and the establishement of continental conditions in the late Cretaceous, the Malm limestones acted as a fresh-water upper boundary leading to progressive out-diffusion of salinity from the originally marine pore-waters of the Jurassic low-permeability sequence. Model calculations suggest that at the end of the Palaeogene, pore-water salinity in Opalinus Clay was about half the original value. In the Chattian/Aquitanian, partial evaporation of sea-water occurred. It is postulated that brines diffused into the underlying sequence over a period of several Myr, resulting in an increase of salinity in Opalinus Clay to levels observed today. This hypothesis is further supported by the isotopic signatures of SO 4 2-and 87 Sr/ 86 Sr in current pore-waters. These are not simple binary mixtures of sea and meteoric water, but their Cl -and stable water-isotope signatures can be potentially explained by a component of partially evaporated sea-water. After the re-establishment of fresh-water conditions on the surface and the formation of the Jura Fold and Thrust Belt, erosion caused the activation of aquifers embedding the low-permeability sequence, leading to the curved profiles of various pore-water tracers that are observed today. Fluid flow triggered by deformation events during thrusting and folding of the anticlines occurred and is documented by infrequent vein infills in major fault structures. However, this flow was spatially focussed and of limited duration and so did not markedly affect the bulk pore-water.

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Section: Palaeogene (66-23 Ma)mentioning

confidence: 99%

Section: Palaeogene (66-23 Ma)mentioning

confidence: 99%

Pore-water evolution and solute-transport mechanisms in Opalinus Clay at Mont Terri and Mont Russelin (Canton Jura, Switzerland)

Mazurek

Haller

2017

Swiss J Geosci

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“…It represents a large, 1,850 km² "hanging" fault ridge (Rothausen and Sonne, 1984) in the overlap area between the Ortho-Graben and the Para-Graben in the intersection of the Upper Rhine Rift and the Permocarboniferous Saar-Nahe Basin. Fully marine conditions prevailed in the Mainz Basin during the second or late Rupelian transgression event (Berger et al, 2005a, b;Pirkenseer et al, 2010). The North Sea extended to the Lower Rhine and today's German low mountain range (Meulenkamp and Sissingh, 2003), and northern Belgium was part of the southern North Sea Basin (e.g., De Man et al, 2004;Vandenberghe et al, 2004).…”

Section: Paleobiogeographymentioning

confidence: 99%

“…By contrast, the available information for the new holotype BSPG 1956 I 540 is more precise according to Barthel (1962, p. 65), who stated that it was found in "middle" Oligocene marine sands or "Meeressanden" (today: Rupelian, lower Oligocene; Grimm et al, 2000) of a gravel pit in Eckelsheim near Alzey (Mainz Basin). Nevertheless, it is commonly accepted that fossil sea cows are only known from sandy and clayey sediments that were deposited during the second Rupelian transgression (e.g., Bahlo and Tobien, 1982;Rothausen and Sonne, 1984;Pirkenseer et al, 2010). The most recent stratigraphic framework of the Mainz Basin was established by Grimm et al (2000), Grimm and Grimm (2003), and Grimm (2005), and therefore it is mainly referred to these works in the following unless otherwise stated.…”

Section: Paleobiogeographymentioning

confidence: 99%

Evidence for two sympatric sirenian species (Mammalia, Tethytheria) in the early Oligocene of Central Europe

Voß

Hampe

2017

J. Paleontol.

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Abstract.-The early Oligocene (Rupelian) sirenian Halitherium schinzii Kaup, 1838, which represents the type species of the genus Halitherium Kaup, 1838, is revised herein based on a morphological re-evaluation of skeletal material originally assigned to this taxon. This study provides new and comprehensive information on the cranial and postcranial anatomy and allows the distinction of two sympatric species. Following a recent approach on the invalidity and subsequent rejection of H. schinzii Kaup, 1838, Kaupitherium gruelli new genus new species is established on the basis of a nearly complete holotype. The second taxon resembles K. gruelli n. sp. in a number of skeletal features, such as reduced nasals and absence of the canines, but can be clearly distinguished mainly by the post-canine dental formula and the supraoccipital morphology. The diagnostic skullcap of a species formerly synonymized under "H. schinzii" is re-validated as the holotype of K. bronni (Krauss, 1858). On the basis of paleoecological implications, a hypothesis is established to explain the overlapping stratigraphic and biogeographic occurrences (i.e., sympatry of both taxa). A diagnosis and up-to-date synonymy complement the taxonomical information. The revision of "H. schinzii" provides new data on the past sirenian diversity and forms the basis for a taxonomic and systematic re-evaluation of species originally grouped in the genus "Halitherium."

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“…The topmost layer of the Froidefontaine Subgroup is represented by the brackish Cyrenenmergel, deposited in shallow water and well known for a rich and abundant fossil fauna (e.g. Pirkenseer et al 2010;Grimm et al 2011b). The transition from the Meletta-Schichten to the Cyrenenmergel is gradual .…”

Section: Froidefontaine Subgroupmentioning

confidence: 99%

The position of the Rupelian/Chattian boundary in the southern Upper Rhine Graben based on new records of microfossils

2013

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This study analyses the regressive phase of the marine Froidefontaine Subgroup and the subsequent fluviolacustrine Niederroedern formation in the southern Upper Rhine Graben during the Late Rupelian and the position of the Rupelian/Chattian boundary. The study is based on the sedimentary record and several microfossil groups from two boreholes, with a focus on new records of fish otoliths, Bolboforma and Charophyta. The biostratigraphic evaluation of these groups provides evidence for a position of the Rupelian/Chattian boundary within the upper Niederroedern Formation. This is contrary to the results from a previous sedimentological approach, which places the boundary at the base of the Niederroedern Formation. The fish fauna indicates a biogeographic relation to southern France, the Molasse Basin of Switzerland and southern Germany.

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Palaeoecology and biostratigraphy of the Paleogene Foraminifera from the southern Upper Rhine Graben and the influence of reworked planktonic Foraminifera

Cited by 9 publications

References 19 publications

Pore-water evolution and solute-transport mechanisms in Opalinus Clay at Mont Terri and Mont Russelin (Canton Jura, Switzerland)

Pore-water evolution and solute-transport mechanisms in Opalinus Clay at Mont Terri and Mont Russelin (Canton Jura, Switzerland)

Evidence for two sympatric sirenian species (Mammalia, Tethytheria) in the early Oligocene of Central Europe

The position of the Rupelian/Chattian boundary in the southern Upper Rhine Graben based on new records of microfossils

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