Bolboforma — an overview

Spiegler, Dorothee; Spezzaferri, Silvia

doi:10.1007/bf03021760

Cited by 9 publications

(10 citation statements)

References 7 publications

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“…The Bolboforma species indicate a Late Rupelian to Early Chattian age corresponding to nannoplankton zone NP24 (Spiegler and Spezzaferri 2005). The otolith assemblage, however, supports a correlation to the Early Rupelian otolith zone OT-O1 based on the presence of Dapalis angustus and Palaeolebias monasterii (Reichenbacher 1999).…”

Section: Cyrenenmergelmentioning

confidence: 89%

“…3/2). The main difference between them lies in a more regular, hexagonal reticulation of B. latdorfensis than seen in B. irregularis (see von Daniels and Spiegler 1974;Pallant and Kaminski 1989;Spiegler and von Daniels 1991;Mackensen and Spiegler 1992;Spiegler and Spezzaferri 2005).…”

Section: Bolboformamentioning

confidence: 99%

“…According to Spiegler and Spezzaferri (2005), Bolboforma represent temperate to cool, fully marine conditions and were restricted to middle and higher latitudes. Records of Bolboforma from the URG have been described from the lower Rupelian (NP22) Middle Pechelbronn Beds of the Mainz Basin, where they are associated with a fully marine ostracod assemblage (Griessemer 2002;Grimm et al 2007).…”

Section: Bolboformamentioning

confidence: 99%

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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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Section: Cyrenenmergelmentioning

confidence: 89%

Section: Bolboformamentioning

confidence: 99%

Section: Bolboformamentioning

confidence: 99%

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

2013

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“…Due to the difficult classification of the slightly eroded specimens from the research area, the attribution to the two species has a preliminary character. The overlapping ranges of both species indicate a "Middle" Oligocene age (NP24; Spiegler & Spezzaferri 2005).…”

Section: Bolboformamentioning

confidence: 99%

“…According to Spiegler & Spezzaferri (2005), Bolboforma are representative for temperate to cool, fully marine conditions and were restricted to middle and higher latitudes. The exclusive occurrence of Bolboforma in sample A-17 (drilling Allschwil-2) suggests a short pronounced recurrence of fully marine conditions in the upper part of the "Marnes à Cyrènes".…”

Section: Bolboformamentioning

confidence: 99%