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A new agglutinated foraminiferal species (Arenoturrispirillina waskowskae sp. nov.) from the Danian of Contessa, Italy

Hikmahtiar Syouma, Kaminski Michael A.

Geology, Geophysics and Environment

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2022

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Vol. 48, no. 4

405--411

EN

This paper describes a new Paleogene deep-water agglutinated foraminifera from the Contessa Highway Section, Umbria-Marche Basin, Italy. The new species Arenoturrispirillina waskowskae is characterised by its predominently high trochospiral coiling, which distinguishes it from the genus Glomospira. The new species is also found in the Polish Carpathians.

2

An Entzia-dominated marsh-type agglutinated foraminiferal assemblage from a salt marsh in Tubli Bay, Bahrain

Kaminski Michael A., Amao Abduljamiu O., Garrison Thomas F., Fiorini Flavia, Magliveras Simeon, Tawabini Bassam S., Waśkowska Anna

Geology, Geophysics and Environment

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2020

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Vol. 46, no. 3

189--204

EN

A salt-marsh assemblage of agglutinated foraminifera was recovered from a salt marsh on the east side of Tubli Bay in eastern Bahrain. This locality is one of the last remaining patches of salt marsh on the east coast of Tubli Bay. The salt marsh is covered by a single marsh plant species, Arthrocnemum macrostachyum. Samples were collected from beneath the Arthrocnemum canopy in two transects beginning at the maximum landward extent of halophytic plants in the high marsh and extending to a tidal channel at the seaward side of the low marsh. A distinct elevation-related zonation in foraminifera is observed from the high marsh to the low marsh. The trochamminids Entzia macrescens and Trochammina inflata are characteristic of the high marsh, whereas Ammonia, Elphidium, Peneroplis and smaller miliolids become common in the middle part of the marsh transect. The tidal channel at the lower limit of the marsh contains an assemblage dominated by Ammonia, Elphidium, adult specimens of Peneroplis, and smaller miliolids, with Clavulina and Agglutinella as the only agglutinated taxa. Living specimens of Entzia and Trochammina were observed during the winter 2019–2020 sampling season, whereas samples collected in Autumn 2019 contained only dead specimens. One new species, ?Sigmoilina canisdementis sp. nov., is described herein. This is the first report of a live Entzia-dominated salt marsh assemblage in the Arabian Gulf region.

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Selective agglutination of tourmaline grains by foraminifera in deep-water flysch environment (Eocene Hieroglyphic beds, Silesian Nappe, Polish Outer Carpathians)

Waśkowska A.

Geological Quarterly

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2014

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Vol. 58, No. 2

337--352

EN

Detrital fragments of automorphic tourmaline crystals are commonly incorporated in tests of simple agglutinated foraminifera that lived in the deep-marine Carpathian turbidite basin, in which deposition of the Hieroglyphic beds (Eocene) took place. Such grains were observed in the tests of 37 taxa representing 20 species. However tourmaline occurs in the Carpathian Flysch sediments as an accessory mineral, still it was selected by the foraminifera as the only heavy mineral to be incorporated in their tests. The proportion of tourmaline-bearing specimens in an assemblage usually amounts to a few percent, but may reach 29% in extreme cases. The particular preference for tourmaline segregation and incorporation in the test walls is shown by the following genera: Psammosiphonella, Reophax, Bathysiphon and Nothia.

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The utility of Deep-Water Agglutinated Foraminiferal acmes for correlating Eocene to Oligocene abyssal sediments in the North Atlantic and Western Tethys

Kamiński M. A.

Studia Geologica Polonica

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2005

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Vol. 124

325-340

EN

Quantitative analysis of Deep-water Agglutinated Foraminifera (DWAF) assemblages from key ODP sites in the North Atlantic reveal the presence of stratigraphically-significant abundance maxima, that may be useful for correlating sedimentary sequences deposited beneath the CCD. The DWAF record from ODP Hole 647A in the Labrador Sea was re-studied and abundances were recalculated by excluding calcareous benthic foraminifera. This hole is a key locality, as it provides direct calibration of the DWAF biostratigraphy to the standard chronostratigraphy. Eight DWAF acmes are recognised in the Eocene to lower Oligocene at Site 647 and at other North Atlantic and Norwegian Sea sites. These are: The Paleocene-Eocene Thermal Maximum (PETM) Glomospira Acme, a lower Eocene N. excelsa acme, an early/middle Eocene Glomospira Acme, a Karrerulina acme, a middle Eocene Reticulophragmium amplectens acme, a middle/late Eocene Spiroplecta- mmina acme, a latest Eocene-early Oligocene Ammodiscus latus acme, and an early Oligocene Spirosigmoilinella acme. Some of these acmes can be correlated with similar events occurring at onshore localities in the Western Tethys (northern Spain, Moroccan Rif, Italian Appenines, Western Carpathians). The occurrence of these DWAF acmes is caused by variations in the trophic continuum which is a consequence of the profound climatic and oceanographic changes that took place in the deep ocean during the Eocene and early Oligocene.

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High resolution Single Particle Analysis by scanning electron microscopy : a new tool to investigate the mineral composition of agglutinated foraminifers

Bartholdy J., Leipe T., Frenzel P., Tauber F., Bahlo R.

Studia Geologica Polonica

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2005

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Vol. 124

35-65

EN

A high resolution Single Particle Analysis by scanning electron microscopy (SEM) and X-ray microanalysis is introduced as a new technique to investigate components of tests of aggluti- nated foraminifers. In a feasibility study, specimens of Nodulina dentaliniformis (Brady, 1881) from surface sediment of the Lübeck Bight (southwestern Baltic Sea) were investigated. A chemical mapping of a selected part of the surface of the last chamber as well as analysis of isolated foraminiferal shell grains and the ambient sediment were carried out. The investigations point to the non-selectivity of the foraminifer to use specific minerals but a selectivity to use specific grain sizes and shapes.

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Comparison of deep-water agglutinated foraminifera from the hemipelagic variegated shales (Lower Turonian-Lower Santonian) and turbiditic Godula beds (Upper Santonian-Campanian) in the Lanckorona-Wadowice area (Silesian Unit, Outer Carpathians, Poland)

Lemańska A.

Studia Geologica Polonica

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2005

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Vol. 124

259-272

EN

Deep-water agglutinated foraminifera (DWAF) have been studied from variegated shales and Godula beds exposed in the vicinity of Kalwaria Zebrzydowska (Silesian Nappe, Outer Carpa- thians, Poland). Following the standard foraminiferal zonation scheme of Geroch & Nowak (1984), the studied variegated shales can be correlated with the Uvigerinammina jankoi Zone (Lower Turonian-Lower Santonian). The Godula beds can be correlated to the Caudammina gigantea Zone (Upper Santonian-Campanian). Foraminiferal assemblages from the variegated shales are dominated by infaunal and semi-infaunal forms. Their occurrence suggests aerobic bottom water conditions associated with low organic matter availability during the deposition of this unit. Such conditions are presumably related to slow sedimentation rate in low energy, well-oxygenated and oligotrophic bottom environment. In contrast, foraminiferal assemblages from the Godula beds are dominated by epifaunal forms, which collected food from the sediment/water interface. It may suggest that sedimentation took place under relatively higher energy conditions with a higher organic matter flux.

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Interpretacja biostratygraficzna i paleoekologiczna zespołów otwornic aglutynujących z paleoceńsko-środkowoeoceńskich osadów płaszczowiny magurskiej w rejonie Suchej Beskidzkiej (Karpaty fliszowe)

Waśkowska-Oliwa A.

Przegląd Geologiczny

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2000

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Vol. 48, nr 4

331-335

PL

Analiza otwornic aglutynujących z paleoceńsko-środkowoeoceńskich osadów płaszczowiny magurskiej, ze strefy raczańskiej północnej, była przedmiotem badań, na podstawie których ustalono, że wyższa część warstw inoceramowych, pstre łupki dolne z Łabowej (fm) oraz dolny piaskowiec ciężkowicki są wieku paleocenskiego, pstre łupki środkowe (fm) powstały we wczesnym eocenie, a pstre łupki górne (fm) w eocenie środkowym. Analiza cech ilościowych i jakościowych według modelu morfogrup (Jones & Charnock, 1985) pozwoliła na określenie warunków paleoekologicznych panujących przy dnie zbiornika magurskiego, w rozpatrywanym interwale czasowym. W późnym paleocenie i w eocenie środkowym przypowierzchniowa część osadu była gorzej natleniona oraz większa była produktywność wód, w stosunku do warunków panujących we wczesnym eocenie.

EN

Agglutinated foraminifera from the Inoceramian beds, variegated shales of the Łabowa Shale Fm., Ciężkowice Sandstone and the Hieroglyphic beds of the northern Raca Subunit (Magura Nappe) were the main subject of these studies. The age determinations based on the foraminiferal assemblages indicate that: the upper part of the Inoceramian beds, lower variegated shales and the lower Ciężkowice Sandstone are of the Paleocene age; middle part of the variegated shales (Łabowa Sh. Fm.) is of the Early Eocene age and the upper variegated shales represent the Middle Eocene. The morphogroup analysis points that during the Late Paleocene and the Middle Eocene it was relatively high organic flux and insufficient oxygenation at the bottom of the basin whereas during Early Eocene time oxygenation was better and surface productivity lower.

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Agglutinated foraminifera, radiolaria and trace fossils from Upper Cretaceous Deep-Water Variegated Shales at Trawne Stream, Grajcarek Unit, Pieniny Klippen Belt, Carpathians, Poland

Bąk K., Uchman A., Bąk M.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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2000

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Vol. 48, nr 1

1-32

EN

The age and palaeoenvironment of the Upper Cretaceous non-calcareous variegated shales have been interpreted, based on the foraminiferal, radiolarian and trace fossil assemblages from the Malinowa Shale Formation of the Grajcarek Unit (Pieniny Klippen Belt, of Poland), exposed at Trawne Stream. The deposits represent the lower part of the Uvigerinammina jankoi Zone (Turonian-Coniacian), as based on the occurrence of foraminifers Uvigerinammina praejankoi Neagu and U. jankoi Majzon, and radiolaria Holocryptocanium barbui Dumitrica, H. tuberculatum Dumitrica, Praeconocaryomma universa Pessagno and P. lipmanae Pessagno. Predominance of non-calcareous shales with siliceous-walled agglutinated foraminifers and radiolaria as the only biotic components, and occurrence of trace fossils typical of the Nereites facies, indicate a deep-water marine palaeoenvironment, below the CCD. Energy of bottom-waters was low, except for rare episodes of diluted turbidite flows. Diversified foraminiferal benthic and trace fossil assemblages, abundant epi- and infaunal foraminiferal morphotypes, low values of foraminiferal dominance index, intense bioturbation of the shales, and well-developed tiering pattern of the trace fossils (including deep-tier ichnotaxa such as Zoophycos and Scolicia), indicate that the sediments were poor in organic matter and were deposited in highly oxygenated conditions. Changes in the sediment colouration (red and grey-green) are reflected in small changes within the foraminiferal benthos and trace fossil assemblages.