Foraminifera from the borehole Altdorf (SE Germany): Proxies for Ottnangian (early Miocene) palaeoenvironments of the Central Paratethys

Pippèrr, Martina; Reichenbacher, Bettina

doi:10.1016/j.palaeo.2010.02.009

Cited by 33 publications

(14 citation statements)

References 44 publications

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“…The taxonomic diversity of planktonic foraminifers in the Rapovce Member decreases to several species: Tenuitella gemma, Cassigerinella globulosa, Globorotaloides hexagonus and Catapsydrax martini. Dwarfing of planktonic foraminfers implies stress-induced conditions, such as the influence of hyposaline waters on the morphogenesis of Cassigerinella chipolensis (Martinotti, 1989) or cool-water preferences of tunuitellids (Pipperr & Reichenbacher, 2010). Stress conditions of surface-water productivity, which were also indicated by the appearance of pyritized frustules of diatoms and tests of pteropods, were caused probably by eutrophication, shallowing and brackishing of sea-water (Šutovská 1987).…”

Section: Foraminifera: Biostratigraphy and Paleoenvironmentsmentioning

confidence: 99%

Oligocene-Early Miocene Planktonic Microbiostratigraphy and Paleoenvironments of the South Slovakian Basin (Lučenec Depression)

Ozdínová

Soták²

2015

Geologica Carpathica

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Oligocene and Lower Miocene sediments of the Lučenec Depression were studied to demonstrate the planktonic bioevents and climatic proxies from the Číž Formation (Rupelian) and Lučenec Formation (Chattian-Aquitanian) on the basis of quantitative analyses of foraminifers and calcareous nannofossils. The oldest nannofossil assemblages of the Číž Formation belonged to the NP23 Zone and were dominated by Reticulofenestra ornata known for preference of temperate eutrophic water conditions. An increase in bioproductivity was documented by abundant large-sized planktonic foraminifers (e.g. Turborotalia ampliapertura, Paragloborotalia nana, Subbotina gortanii) and epifaunal to shallow-infaunal benthic species. The middle part of the Číž Formation reveals a lowstand progradation of deltaic sediments of the Rapovce Member. There, the planktonic foraminifers are impoverished in both size and diversity, containing mostly tenuitellid and cassigerinellid species, probably as a result of decreased salinity and increased anoxia in the Tard Clay. Contrary of this, the benthic foraminifers are rich, mainly the infaunal forms of uvigerinid species. They probably proliferated due to a high organic flux from riverine input.

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Section: Foraminifera: Biostratigraphy and Paleoenvironmentsmentioning

confidence: 99%

Oligocene-Early Miocene Planktonic Microbiostratigraphy and Paleoenvironments of the South Slovakian Basin (Lučenec Depression)

Ozdínová

Soták²

2015

Geologica Carpathica

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“…After that, the plankton/benthos (P/B) ratio was calculated for each sample. Benthic foraminifera species were identified according to Papp et al (1978), Papp & Schmid (1985), Loeb lich & Tappan (1987a,b) and Cicha et al (1998), while palaeoecological proxies were co-opted from Kaiho (1994Kaiho ( , 1999; Den Dulk et al (2000), Hohenegger (2005), Van Hinsbergen et al (2005), Báldi (2006), , Holcová & Zágoršek (2008), Pippèrr & Reichenbacher (2010), De & Gupta (2010), Grunert et al (2012), Pérez-Asensio et al (2012) and Pezelj et al (2013). Each standardized sample was carefully checked (the presence of size-sorting, fragmentation, abrasion, corrosion, and the incongruence of stratigraphic ranges and palaeoecological preferences), in order to exclude redeposited and transported specimens of benthic foraminifera from statistical analysis (Murray 1991;Holcová 1999).…”

Section: Methodsmentioning

confidence: 99%

Shallow-water benthic foraminiferal assemblages and their response to the palaeoenvironmental changes — example from the Middle Miocene of Medvednica Mt. (Croatia, Central Paratethys)

Pezelj¹,

Sremac²,

Bermanec³

2016

Geologica Carpathica

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During the Middle Miocene, the northern Croatian Medvednica Mt. was an island within the Pannonian Basin System, situated on the SW margin of the Central Paratethys Sea. Miocene sedimentary rocks (the Late Badenian Bulimina-Bolivina Zone and Ammonia beccarii ecozone), from the SW slopes of Medvednica Mt. clearly reflect a transgressive-regressive cycle with emersion during the Badenian/Sarmatian boundary. After the initial phase of transgression, the pioneer Elphidium-Asterigerinata-Ammonia benthic foraminiferal assemblage is present in bioclastic limestones, such as those at the Borovnjak locality. This marginal marine assemblage from a highly energetic, normally saline environment is characterized by poor preservation of foraminiferal tests, low diversity and strong domination. Advanced transgression is followed by establishment of the Elphidium-Asterigerinata assemblage, which is found in biocalcsiltites from the laterally deeper and more sheltered environment at Gornje Vrapče. This diverse assemblage is typical for inner/middle shelf environment with sufficient oxygen content. A general shallowing upward trend can be recognized at both localities, followed by visible interchange of different sedimentological and biotic features. Successive and oscillatory regression in the marginal marine environment was followed by salinity fluctuations and final brackish conditions with Ammonia-Elphidium assemblage. The laterally deeper environment reacted to regressive trends on finer scale with almost regular changes of benthic foraminiferal assemblages in the laminae (Heterolepa-Bolivina assemblage/Bolivina-Cassidulina assemblage/Elphidium-Asterigerinata assemblage). It might reflect sea-level oscillations with periodically increased siliciclastic and nutrient input from land or influence of seasonality on benthic assemblages, which occurred in the advanced phase of the regression near the Badenian/Sarmatian boundary.

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“…The classification is based on the studies of Kaiho (1994Kaiho ( 1999, Murray (2006), Vetõ et al (2007) and Pippèrr and Reichenbacher (2010).…”

Section: Methodsmentioning

confidence: 99%

“…The planktonic foraminifera are classified as cold, temperate and warm surface water temperature indicators (Zágoršek et al 2008;Pippèrr and Reichenbacher 2010). The interpretation of the results was made following Spezzaferri (1995) and Spezzaferri and Premoli Silva (1991 -Estimation of the depth by planktonic/benthic ratio (PBR), following the slightly different methods of Wright (1977), van Marle (1987 and van der Zwaan et al (1990).…”

Section: Methodsmentioning

confidence: 99%

Paleoenvironmental and stratigraphic investigations of the foraminiferal fauna from the Karpatian (Lower Miocene) Garáb Schlier Formation of the Mátraverebély-122 (Mv-122) borehole (North Hungary)

Sóron¹

2011

Central European Geology

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The Garáb Schlier Formation is composed of gray sand, silt, clay and clay marl, deposited in an open marine environment. The aims of this study were to reconstruct its paleoenvironmental features and to propose a hypostratotype of the Garáb Schlier Formation. Eighty-seven samples from the Mv-122 borehole (between 177.0-698.0 m) provided a dataset for detailed qualitative and quantitative analysis. The benthic and planktonic foraminiferal fauna were studied together. The associations indicated three different environments in the section. The lower part of the section records deposition in a normal marine, cool, outer shelf environment. Later on conditions changed to an upper bathyal, normal salinity, cool environment without permanent currents. Assemblages from the upper part of the section suggest that the water depth decreased and an inner shelf, normal salinity sea is inferred, with fluvial influence and open marine connections. The age of the sediment is Late Karpatian (Latest Burdigalian) as indicated by the M4b Planktonic Foraminifera Zone. The middle part of the studied section (337.0-664.0 m) is proposed here as the hypostratotype of the Garáb Schlier Formation.

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Foraminifera from the borehole Altdorf (SE Germany): Proxies for Ottnangian (early Miocene) palaeoenvironments of the Central Paratethys

Cited by 33 publications

References 44 publications

Oligocene-Early Miocene Planktonic Microbiostratigraphy and Paleoenvironments of the South Slovakian Basin (Lučenec Depression)

Oligocene-Early Miocene Planktonic Microbiostratigraphy and Paleoenvironments of the South Slovakian Basin (Lučenec Depression)

Shallow-water benthic foraminiferal assemblages and their response to the palaeoenvironmental changes — example from the Middle Miocene of Medvednica Mt. (Croatia, Central Paratethys)

Paleoenvironmental and stratigraphic investigations of the foraminiferal fauna from the Karpatian (Lower Miocene) Garáb Schlier Formation of the Mátraverebély-122 (Mv-122) borehole (North Hungary)

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