Cretaceous Agglutinated Foraminifera of the Atlantic Ocean off West Africa (Leg 41, Deep Sea Drilling Project)

Krasheninnikov, V.A.

doi:10.2973/dsdp.proc.41.110.1978

Cited by 9 publications

(7 citation statements)

References 2 publications

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“…Neither of these species, however, is present in the deep Norwegian-Greenland Sea. Cyclammina rotundidorsata was reported by Verdenius and Van Hinte (1983) smaller than the bathyal variety, and because of this Miller et al (1982) recorded its occurrence at Site 112 as Ammodiscus rugosus Schijfsma, following Krasheninnikov and Pflaumann (1977). However, A. rugosus is an upper…”

Section: B Eocene --mentioning

confidence: 87%

“…Cretaceous species known from the epicontinental deposits of Europe (Schijfsma, 1946) and possibly from Site 367 off Morocco (Krasheninnikov and Pflaumann, 1977 (Fig. 3-21).…”

Section: B Eocene --mentioning

confidence: 99%

“…Intermittent shallow marine connections between the North Sea and the northern margin of the Tethys seaway existed across central Europe via the Danish-Polish Trough (Pozaryska, 1981;Ziegler, 1982;McKenna, 1983), Microfossil data were compiled from the Schlieren flysch of the Swiss Alps (Winkler, 1984), the Wienerwald flysch in the Austrian Alps (Grun et al, 1964) and the Polish Carpathians (Jurkiewicz, 1967;Jednorowska, 1975;Kaminski et al, in press, a). In the abyssal equatorial Atlantic, data were compiled from DSDP Sites 368 (Krasheninnikov and Pflaumann, 1977) and 543A (Hemleben and Troester, 1984). Spot samples from Sites 543A and 368 were RZEHAKINACEA Cushman, 1933 Rzehakina complanata (Grzybowski) Rzehakina epigona (Rzehak) Rzehakina fissistomata (Grzybowski) Rzehakina inclusa (Grzybowski) Kaminski et al (in press, d).…”

Section: *U Waammmma M Pmmentioning

confidence: 99%

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Cenozoic deep-water agglutinated foraminifera in the North Atlantic

Kaminski¹

1987

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Cenozoic (predominantly Paleogene) "flysch-type" agglutinated foraminiferal assemblages and their modern analogs in the North Atlantic and adjacent areas have been studied to provide an overview of their spatial and temporal distribution and utility for paleoenvironmental analysis. Over 200 species of agglutinated foraminifera have been recognized in Paleogene sediments from North Atlantic and Tethyan basins. This unified taxonomic data base enables the first general synthesis of biostratigraphic, paleobiogeographic and paleobathymetric patterns in flysch-type agglutinated assemblages from upper Cretaceous to Neogene sediments in the North Atlantic. The majority of taxa are cosmopolitan, but latitudinal, temporal and depth-related trends in diversity and species composition are observed among flysch-type assemblages.Modern deep-sea agglutinated foraminiferal faunas provide an analog to fossil flysch-type assemblages and serve as models for paleoecologic studies. Core-top samples from the Panama Basin, Gulf of Mexico and Nova Scotian continental rise were examined in order to determine the habitats of modern species of agglutinated foraminifera. The ecology of modern taxa provides constraints on the paleoenvironmental significance of fossil agglutinated assemblages in the North Atlantic, and their utility for paleoceanography.Towards this end, spade core samples from a 3912 m deep station in the Panama Basin were studied to determine abundance and microhabitat partitioning among living agglutinated foraminiferal populations and the preservation of dead assemblages. The genera Dendrophrya, Cribrostomoides and Ammodiscus have epifaunal habitats and the genus Reophax is predominantly infaunal. Species of Reophax are probably responsible for fine reticulate burrows observed in xradiographs. An experiment using recolonization trays in the Panama Basin was designed to identify opportunistic species of benthic foraminifera, and to assess the rate at which a population can colonize an abiotic substrate. The most successful colonizer at this site is Reophax, while Dendrophrya displays the lowest capability for dispersal. After nine months the abundance of living individuals in sediment trays was one-tenth to one-third that of background abundance, but the faunal diversity did not differ greatly from control samples. Recolonization by benthic foraminifera is more rapid than among macrofaunal invertebrates.Modern agglutinated assemblages from the Louisiana continental slope were examined to determine changes in species composition associated with hydrocarbon seeps. Organic-rich substrates are characterized by a decrease in astror--iihizids and an increase in trochamminids and textulariids. Highly organicenriched substrates with chemosynthetic macrofauna are dominated by Trochammina glabra and Glomospira charoides.The biostratigraphy of fossil agglutinated foraminifera in the North Atlantic is based on detailed analysis of 670 samples from 14 wells and one outcrop section, and examination of additional picked faunal...

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Section: B Eocene --mentioning

confidence: 87%

“…Cretaceous species known from the epicontinental deposits of Europe (Schijfsma, 1946) and possibly from Site 367 off Morocco (Krasheninnikov and Pflaumann, 1977 (Fig. 3-21).…”

Section: B Eocene --mentioning

confidence: 99%

Section: *U Waammmma M Pmmentioning

confidence: 99%

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Cenozoic deep-water agglutinated foraminifera in the North Atlantic

Kaminski¹

1987

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“…Ammodiscus latus {sensu lato) occurs in both bathyal and abyssal assemblages in the Labrador Sea. The abyssal variety is noticeably smaller than the bathyal variety, and because of this Miller et al (1982) recorded its occurrence at Site 112 as Ammodiscus rugosus Schijfsma, following Krasheninnikov and Pflaumann (1977). However, A. rugosus is an Upper Cretaceous species known from the epicontinental deposits of Europe (Schijfsma, 1946), and possibly from Site 367 off Morocco (Krashenninikov and Pflaumann, 1977).…”

Section: Comparison Of Site 647 Assemblages With Regional Zonationsmentioning

confidence: 99%

Paleogene Benthic Foraminifer Biostratigraphy and Paleoecology at Site 647, Southern Labrador Sea

Kaminski¹,

Gradstein²,

Berggren³

1989

Proceedings of the Ocean Drilling Program

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Benthic foraminifers were examined from the Paleogene of Ocean Drilling Program (ODP) Site 647 and Deep Sea Drilling Program (DSDP) Site 112 in the southern Labrador Sea. The Paleogene sequence of the deep Labrador Sea can be subdivided into seven assemblages, based on the ranges and relative abundance of characteristic taxa. The first oc currences (FOs) and last occurrences (LOs) of important benthic taxa are calibrated to a standard biochronology, by in terpolating from our age model for Site 647. The biostratigraphy of Site 647 is used to improve the age estimates of Site 112 cores. Fifteen microfossil events in Site 647 also are found in the sedimentary wedge along the Labrador Margin. A comparison of the probabilistic microfossil sequence from the Labrador Margin with that at Site 647 yields four isoch ronous benthic foraminifer LOs. Two new species are described from Sites 647 and 112: Hyperammina kenmilleri, Kaminski n.sp., and Ammodiscus nagyi Kaminski n.sp.Significant faunal turnovers are observed at the Ypresian/Lutetian and Eocene/Oligocene boundaries. The Ypresian/Lutetian boundary is characterized by a Glomospira-facies and is attributed to a rise in the CCD (carbonate com pensation depth) associated with the NP14 lowstand in sea level. The Eocene/Oligocene boundary is delimited by the LO of Spiroplectammina spectabilis and Reticulophragmium amplectens. The change from an Eocene agglutinated as semblage to a predominantly calcareous assemblage in the early Oligocene took place gradually, over a period of about 4 Ma, but the rate of change accelerated near the boundary. This faunal turnover is attributed to changes in the preser vation of agglutinated foraminifers, as delicate species disappeared first. Increasingly poorer preservation of aggluti nated foraminifers in the late Eocene to earliest Oligocene reflects the first appearance of cool, nutrient-poor deep wa ter in the southern Labrador Sea. The approximately coeval disappearance of agglutinated assemblages along the Lab rador Margin was caused by a regional trend from slope to shelf environments, accentuated by the "mid"-Oligocene lowstand in sea level.

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“…Length 1.0 mm, thickness 0.5 mm, width 0.6 mm. Described from the Upper Cretaceous of Western Europe and DSDP Sites 327 and 330, Falkland Plateau (Sliter, 1976), 367 and 368, Cape Verde Basin (Krasheninnikov and Pflaumann, 1978 Le Calvez, de Klasz, and Brun, 1971, p. 308, pi. 1, figs.…”

Section: Genus Uvigerinammina Majzon 1943mentioning

confidence: 99%

Benthic Foraminifers in Mesozoic and Cenozoic Sediments of the Southwestern Atlantic As an Indicator of Paleoenvironment, Deep Sea Drilling Project Leg 71

Cretaceous Agglutinated Foraminifera of the Atlantic Ocean off West Africa (Leg 41, Deep Sea Drilling Project)

Abstract: ABSTRACT

Cited by 9 publications

References 2 publications

Cenozoic deep-water agglutinated foraminifera in the North Atlantic

Cenozoic deep-water agglutinated foraminifera in the North Atlantic

Paleogene Benthic Foraminifer Biostratigraphy and Paleoecology at Site 647, Southern Labrador Sea

Benthic Foraminifers in Mesozoic and Cenozoic Sediments of the Southwestern Atlantic As an Indicator of Paleoenvironment, Deep Sea Drilling Project Leg 71

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