Ecology and Applications of Benthic Foraminifera

Murray, John W.

doi:10.1017/cbo9780511535529

Cited by 1,162 publications

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“…In agreement with these findings, the benthic foraminiferal assemblages in the study area have characteristically low diversity and are dominated by Biasterigerina planorbis and Cibicides refulgens, two epifaunal species (Jorissen et al, 1995;Murray, 2006).…”

Section: Accepted M Manuscriptsupporting

confidence: 84%

An enigmatic kilometer-scale concentration of small mytilids (Late Miocene, Guadalquivir Basin, S Spain)

Aguirre

Braga

Martín

et al. 2015

Palaeogeography, Palaeoclimatology, Palaeoecology

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Upper Miocene heterozoan carbonates crop out extensively in a NE-SW-trending belt (42 km long and 1.5-8 km wide) along the so-called El Alcor topographic high, from Carmona to Dos Hermanas (Seville, S Spain). These carbonates formed at the southern active margin of the Guadalquivir Basin, the foreland basin of the Betic Cordillera.They change to marls basinward (NE) and to sands landward (SE and SW). Therefore, carbonate production was constrained to a limited area in an otherwise siliciclastic shelf.The carbonates (up to 40 m thick) overlie a gradually coarsening-upward succession of marls followed by silts and sandstones. The carbonate sequence can be divided into three subunits corresponding, from bottom to top, to lowstand, transgressive, and highstands system tracts deposits. The lower subunit, exhibiting extensive trough crossbedding, is interpreted as a shallow-water bar deposit. The intermediate subunit onlaps underlying sediments and was deposited in deeper, low-turbulence conditions. The upper subunit deposits accumulated in a well-oxygenated outer platform based on benthic foraminiferal assemblages. The presence of hummocky and swaley crossstratification in these latter deposits suggests that they were affected by storms.Pervasive fluid-escape structures are also observed throughout the carbonates.The three subunits consist of bioclastic packstones to rudstones made up of abundant fragments of small mytilids. Isotopic data from serpulid polychaete Ditrupa tubes show 13 C-depleted values (up to -16.1‰), whereas  18 O yields normal marine values. Additional isotopic data on shells of scallops, oysters, and small mussels, as well as bulk sediment, show diagenetic alterations. Based on actualistic examples of massive concentrations of mussels, the nearly monospecific composition of the El Alcor deposits, together with negative  13 C values of Ditrupa tubes, indicates that cold seeps A C C E P T E D M A N U S C R I P T

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Section: Accepted M Manuscriptsupporting

confidence: 84%

An enigmatic kilometer-scale concentration of small mytilids (Late Miocene, Guadalquivir Basin, S Spain)

Aguirre

Braga

Martín

et al. 2015

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…The Q-mode PCA Nonion fabum assemblage, which includes species inhabiting inner-middle shelf such as Ammonia beccarii and Ammonia sp. (Murray, 1991(Murray, , 2006, occurs in the lowermost sample of the section (Fig. 7, Table 5).…”

Section: Relative Sea-level Fluctuationsmentioning

confidence: 97%

“…It is largely proved that these organisms are very useful to reconstruct the paleoenviromental conditions in marine settings, as their distribution depends on several physical, chemical and biological factors (Murray, 1991(Murray, , 2006. They can be used as proxies of oceanographic parameters such as water depth, substrate, oxygen content and organic matter supply (Jorissen et al, 2007).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Messinian paleoenvironmental evolution in the lower Guadalquivir Basin (SW Spain) based on benthic foraminifera

Pérez-Asensio

Aguirre

Schmiedl

et al. 2012

Palaeogeography, Palaeoclimatology, Palaeoecology

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Benthic foraminiferal assemblages of a drill core from the lower Guadalquivir Basin (northern Gulf of Cádiz, SW Spain) have been analysed in order to reconstruct the paleoenvironmental evolution in the vicinity of the Betic seaways during the Messinian. The core consists of marine sediments ranging from the latest Tortonian to the early Pliocene. Changes in the abundance of certain marker species, planktonic/benthic ratio (P/B ratio), paleodepth estimated with a transfer function, content of sand grains and presence of glauconitic layers indicate a complete transgressive-regressive sea-level cycle from the bottom to the top of the section. An abrupt sea-level rise, from inner-middle shelf to middle slope, is recorded at the lowermost part of the core (latest Tortonian-earliest Messinian), followed by a relatively rapid shallowing from middle slope to outer shelf. Magnetobiostratigraphic data show These assemblages are dominated by Nonion fabum and Bulimina elongata, two taxa that are able to feed from continental low-quality organic matter, most likely derived from river run-off. The paleoenviromental evolution on the Atlantic side of Betic and Rifian seaways is similar during the Messinian, with a Messinian continuous sea-level lowering driven by regional tectonic uplift and upwelling-related waters reaching the upper slope. This study will further contribute to understand the role of tectonics on the sea-level changes as well as on the closure of the Atlantic-Mediterranean gateways that led to the MSC, and on the paleoceanography on the Atlantic sides of these corridors.

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“…The record of benthic foraminifers in the outer shelf was appropriate for 250 environmental analyses because benthic foraminifers respond rapidly to changing conditions 251 such as deepening, sediment supply, organic matter, and oxygen concentrations (Sen Gupta et 252 al., 1993;. For this study we classified benthic foraminifers based on Murray (1991,2006 tepida, E. macellum, and E. articulatum were also present during the initial marine incursion, 269 from 12 ka BP to 11.0 ka BP, and they indicate that the sediments were deposited in a shallow 270 water environment with a wide range in salinity conditions (Debenay et al, 1998;Murray, 2006; 271 Meric and Algan, 2007; Fig. 7).…”

Section: Benthic and Planktonic Foraminifers 247mentioning

confidence: 99%

The last reconnection of the Marmara Sea (Turkey) to the World Ocean: A paleoceanographic and paleoclimatic perspective

et al. 2008

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18During the late glacial, marine isotope Stage 2, the Marmara Sea transformed into a 19 brackish lake as global sea level fell below the sill in the Dardanelles Strait. A record of the 20 basin's reconnection to the global ocean is preserved in its sediments permitting the extraction of 21 the paleoceanographic and paleoclimatic history of the region. The goal of this study is to 22 develop a high-resolution record of the lacustrine to marine transition of Marmara Sea in order to 23 2 reconstruct regional and global climatic events at a millennial scale. For this purpose, we mapped 24 the paleoshorelines of Marmara Sea along the northern, eastern, and southern shelves at 25Çekmece, Prince Islands, and Imrali, using data from multibeam bathymetry, high-resolution 26 subbottom profiling (chirp) and ten sediment cores. Detailed sedimentologic, biostratigraphic 27 (foraminifers, mollusk, diatoms), X-ray fluorescence geochemical scanning, and oxygen and 28 carbon stable isotope analyses correlated to a calibrated radiocarbon chronology provided 29 evidence for cold and dry conditions prior to 15 ka BP, warm conditions of the Bolling-Allerod 30 from ~15 to 13 ka BP, a rapid marine incursion at 12 ka BP, still stand of Marmara Sea and 31 sediment reworking of the paleoshorelines during the Younger Dryas at ~11.5 to 10.5 ka BP, and 32 development of strong stratification and influx of nutrients as Black Sea waters spilled into 33 Marmara Sea at 9.2 ka BP. Stable environmental conditions developed in Marmara Sea after 6.0 34 ka BP as sea-level reached its present shoreline and the basin floors filled with sediments 35 achieving their present configuration. 36 37

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Ecology and Applications of Benthic Foraminifera

Cited by 1,162 publications

References 0 publications

An enigmatic kilometer-scale concentration of small mytilids (Late Miocene, Guadalquivir Basin, S Spain)

An enigmatic kilometer-scale concentration of small mytilids (Late Miocene, Guadalquivir Basin, S Spain)

Messinian paleoenvironmental evolution in the lower Guadalquivir Basin (SW Spain) based on benthic foraminifera

The last reconnection of the Marmara Sea (Turkey) to the World Ocean: A paleoceanographic and paleoclimatic perspective

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