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Bruce Corliss

Professor Emeritus
Earth and Climate Sciences
103 Old Chem Bldg, Durham, NC 27710

Selected Publications


Deep-sea benthic diversity linked to seasonality of pelagic productivity

Journal Article Deep-Sea Research Part I: Oceanographic Research Papers · May 1, 2009 Latitudinal gradients in biodiversity are found in both terrestrial and marine environments, but little agreement exists on the mechanisms or ecological causes creating these patterns. Marine biodiversity patterns have been particularly challenging to docu ... Full text Cite

Compositional variability in a cold-water scleractinian, Lophelia pertusa: New insights into "vital effects"

Journal Article Geochemistry, Geophysics, Geosystems · December 1, 2006 We analyzed Sr/Ca and Mg/Ca ratios in the thecal wall of Lophelia pertusa, a cold-water coral, using SIMS ion microprobe techniques. The wall grows by simultaneous upward extension and outward thickening. Compositional variability displays similar trends a ... Full text Cite

Influence of seasonal primary productivity on δ13C of North Atlantic deep-sea benthic foraminifera

Journal Article Deep-Sea Research Part I: Oceanographic Research Papers · April 1, 2006 The stable isotopic composition of benthic foraminifera has been widely used to reconstruct deep-ocean circulation, but questions have been raised about the influence of organic carbon flux on the carbon isotopic composition of deep-sea taxa. We show that ... Full text Cite

A time series study of the carbon isotopic composition of deep-sea benthic foraminifera

Journal Article Paleoceanography · 2002 Variation of the δ13C of living (Rose Bengal stained) deep-sea benthic foraminifera is documented from two deep-water sites (∼2430 and ∼3010 m) from a northwest Atlantic Ocean study area 275 km south of Nantucket Island. The carbon isotopic data of Hoeglun ... Cite

Vertical distributions and stable isotopic compositions of live (stained) benthic foraminifera from the North Carolina and California continental margins

Journal Article Deep-Sea Research Part I: Oceanographic Research Papers · June 1, 1997 The vertical distributions of live (Rose Bengal stained) benthic foraminifera were determined in Soutar box cores from six sites on the North Carolina continental margin (337-1477 m) and three sites on the California continental margin (786-3705 m). Staine ... Full text Cite

Laboratory observations of rates and patterns of movement of continental margin benthic foraminifera

Journal Article Marine Micropaleontology · February 1, 1997 Living calcareous and agglutinated benthic foraminifera were collected from a water depth of 220 m on the Charleston Bump east of Charleston, South Carolina and maintained in aquaria at ambient bottom water temperatures of 12°C and 1 arm in the laboratory. ... Full text Cite

Comparisons of the ecology and stable isotopic compositions of living (stained) benthic foraminifera from the Sulu and South China Seas

Journal Article Deep-Sea Research Part I: Oceanographic Research Papers · October 1, 1996 Significant differences are observed between living (Rose Bengal stained) deep-sea benthic foraminifera found in 14 box cores (510-4515 m) from the thermospheric (> 10°C) environments of the Sulu Sea and the psychrospheric (<10°C) conditions in the South C ... Full text Cite

Seasonality of living benthic foraminifera from the San Pedro Basin, California Borderland

Journal Article Journal of Foraminiferal Research · January 1, 1996 Analysis of Rose Bengal-stained benthic foraminifera from six box cores collected from the San Pedro Basin in April, July, and October, 1988 (∼720 m water depth) reveals that the foraminiferal assemblages vary during this six month period. Species diversit ... Full text Cite

The ecology of living (stained) deep-sea benthic foraminifera from the Sulu Sea

Journal Article Paleoceanography · 1994 Despite the uniformity of bottom water temperatures, salinities, and dissolved oxygen levels below 1000 m, significant faunal differences exist at different depths in the low-oxygen basin. The shallowest site (510 m) is dominated (>10% of the calcareous ... Cite

Deposit feeding in selected deep-sea and shallow-water benthic foraminifera

Journal Article Deep-Sea Research Part I · January 1, 1994 Ultrastructural evidence for deposit feeding in two deep-sea foraminifera, Globobulimina pacifica and Uvigerina peregrina, is presented and compared with results on Ammonia beccarii, a common nearshore dweller. In all three taxa, food vacuoles are common i ... Full text Cite

Living (stained) benthic foraminifera within surficial sediments of the Skagerrak

Journal Article Marine Geology · January 1, 1993 An analysis of living (stained) benthic foraminifera within four box cores raised from water depths of 74 to 621 m in the Skagerrak shows that faunal patterns at different water depths are strikingly different within this relatively shallow, organicrich ma ... Full text Cite

Distribution and microhabitats of living (stained) benthic foraminifera from the Canadian Arctic Archipelago

Journal Article Marine Micropaleontology · January 1, 1993 The geographic distribution of live (Rose Bengal stained) foraminifera from box cores taken in the Canadian Archipelago shows a dominance of agglutinated species in the western study area and an abundance of calcareous forms in the east. This distribution ... Full text Cite

Rapid growth of deep-sea benthic foraminifera

Journal Article Geology · 1993 Buliminella tenuata and Nonionella stella from a coastal upwelling region showed abundance changes reflecting rapid growth of these taxa over a three month interval. Rapid growth indicates that the chemical composition of the calcareous foraminiferal test, ... Cite

Rapid growth of deep-sea benthic foraminifera

Journal Article Geology · 1993 Buliminella tenuata and Nonionella stella from a coastal upwelling region showed abundance changes reflecting rapid growth of these taxa over a three month interval. Rapid growth indicates that the chemical composition of the calcareous foraminiferal test, ... Full text Cite

Rapid growth of deep-sea benthic foraminifera

Journal Article Geology · 1993 Buliminella tenuata and Nonionella stella from a coastal upwelling region showed abundance changes reflecting rapid growth of these taxa over a three month interval. Rapid growth indicates that the chemical composition of the calcareous foraminiferal test, ... Full text Cite

Deep-sea benthic diversity linked to seasonality of pelagic productivity

Journal Article Deep-Sea Research Part I: Oceanographic Research Papers · May 1, 2009 Latitudinal gradients in biodiversity are found in both terrestrial and marine environments, but little agreement exists on the mechanisms or ecological causes creating these patterns. Marine biodiversity patterns have been particularly challenging to docu ... Full text Cite

Compositional variability in a cold-water scleractinian, Lophelia pertusa: New insights into "vital effects"

Journal Article Geochemistry, Geophysics, Geosystems · December 1, 2006 We analyzed Sr/Ca and Mg/Ca ratios in the thecal wall of Lophelia pertusa, a cold-water coral, using SIMS ion microprobe techniques. The wall grows by simultaneous upward extension and outward thickening. Compositional variability displays similar trends a ... Full text Cite

Influence of seasonal primary productivity on δ13C of North Atlantic deep-sea benthic foraminifera

Journal Article Deep-Sea Research Part I: Oceanographic Research Papers · April 1, 2006 The stable isotopic composition of benthic foraminifera has been widely used to reconstruct deep-ocean circulation, but questions have been raised about the influence of organic carbon flux on the carbon isotopic composition of deep-sea taxa. We show that ... Full text Cite

A time series study of the carbon isotopic composition of deep-sea benthic foraminifera

Journal Article Paleoceanography · 2002 Variation of the δ13C of living (Rose Bengal stained) deep-sea benthic foraminifera is documented from two deep-water sites (∼2430 and ∼3010 m) from a northwest Atlantic Ocean study area 275 km south of Nantucket Island. The carbon isotopic data of Hoeglun ... Cite

Vertical distributions and stable isotopic compositions of live (stained) benthic foraminifera from the North Carolina and California continental margins

Journal Article Deep-Sea Research Part I: Oceanographic Research Papers · June 1, 1997 The vertical distributions of live (Rose Bengal stained) benthic foraminifera were determined in Soutar box cores from six sites on the North Carolina continental margin (337-1477 m) and three sites on the California continental margin (786-3705 m). Staine ... Full text Cite

Laboratory observations of rates and patterns of movement of continental margin benthic foraminifera

Journal Article Marine Micropaleontology · February 1, 1997 Living calcareous and agglutinated benthic foraminifera were collected from a water depth of 220 m on the Charleston Bump east of Charleston, South Carolina and maintained in aquaria at ambient bottom water temperatures of 12°C and 1 arm in the laboratory. ... Full text Cite

Comparisons of the ecology and stable isotopic compositions of living (stained) benthic foraminifera from the Sulu and South China Seas

Journal Article Deep-Sea Research Part I: Oceanographic Research Papers · October 1, 1996 Significant differences are observed between living (Rose Bengal stained) deep-sea benthic foraminifera found in 14 box cores (510-4515 m) from the thermospheric (> 10°C) environments of the Sulu Sea and the psychrospheric (<10°C) conditions in the South C ... Full text Cite

Seasonality of living benthic foraminifera from the San Pedro Basin, California Borderland

Journal Article Journal of Foraminiferal Research · January 1, 1996 Analysis of Rose Bengal-stained benthic foraminifera from six box cores collected from the San Pedro Basin in April, July, and October, 1988 (∼720 m water depth) reveals that the foraminiferal assemblages vary during this six month period. Species diversit ... Full text Cite

The ecology of living (stained) deep-sea benthic foraminifera from the Sulu Sea

Journal Article Paleoceanography · 1994 Despite the uniformity of bottom water temperatures, salinities, and dissolved oxygen levels below 1000 m, significant faunal differences exist at different depths in the low-oxygen basin. The shallowest site (510 m) is dominated (>10% of the calcareous ... Cite

Deposit feeding in selected deep-sea and shallow-water benthic foraminifera

Journal Article Deep-Sea Research Part I · January 1, 1994 Ultrastructural evidence for deposit feeding in two deep-sea foraminifera, Globobulimina pacifica and Uvigerina peregrina, is presented and compared with results on Ammonia beccarii, a common nearshore dweller. In all three taxa, food vacuoles are common i ... Full text Cite

Living (stained) benthic foraminifera within surficial sediments of the Skagerrak

Journal Article Marine Geology · January 1, 1993 An analysis of living (stained) benthic foraminifera within four box cores raised from water depths of 74 to 621 m in the Skagerrak shows that faunal patterns at different water depths are strikingly different within this relatively shallow, organicrich ma ... Full text Cite

Distribution and microhabitats of living (stained) benthic foraminifera from the Canadian Arctic Archipelago

Journal Article Marine Micropaleontology · January 1, 1993 The geographic distribution of live (Rose Bengal stained) foraminifera from box cores taken in the Canadian Archipelago shows a dominance of agglutinated species in the western study area and an abundance of calcareous forms in the east. This distribution ... Full text Cite

Rapid growth of deep-sea benthic foraminifera

Journal Article Geology · 1993 Buliminella tenuata and Nonionella stella from a coastal upwelling region showed abundance changes reflecting rapid growth of these taxa over a three month interval. Rapid growth indicates that the chemical composition of the calcareous foraminiferal test, ... Cite

Rapid growth of deep-sea benthic foraminifera

Journal Article Geology · 1993 Buliminella tenuata and Nonionella stella from a coastal upwelling region showed abundance changes reflecting rapid growth of these taxa over a three month interval. Rapid growth indicates that the chemical composition of the calcareous foraminiferal test, ... Full text Cite

Rapid growth of deep-sea benthic foraminifera

Journal Article Geology · 1993 Buliminella tenuata and Nonionella stella from a coastal upwelling region showed abundance changes reflecting rapid growth of these taxa over a three month interval. Rapid growth indicates that the chemical composition of the calcareous foraminiferal test, ... Full text Cite

An analysis of recent deep-sea benthic foraminiferal morphotypes from the Norwegian and Greenland seas

Journal Article Palaeogeography, Palaeoclimatology, Palaeoecology · January 1, 1992 Benthic foraminifera from 36 core tops from the Norwegian and Greenland seas have been placed into morphotype categories based on test shape, nature of coiling, and the presence or absence of wall pores. These morphotypes have distinctive patterns with wat ... Full text Cite

Morphology and microhabitat preferences of benthic foraminifera from the northwest Atlantic Ocean

Journal Article Marine Micropaleontology · January 1, 1991 The distribution of Rose Bengal stained calcareous benthic foraminifera was determined in six {ballot box} cores raised from water depths between 200 and 3000 m on the Nova Scotian continental margin and Gulf of Maine. The taxa can be separated into four m ... Full text Cite

Benthic foraminiferal evidence for reduced deep-water circulation during sapropel deposition in the eastern Mediterranean

Journal Article Marine Geology · January 1, 1990 An analysis of deep-sea benthic foraminifera from six eastern Mediterranean piston cores was carried out to determine the faunal response to the deposition of sapropel S5, formed between 125,000 and 116,000 yrs B.P. The pre-S5 population is the most divers ... Full text Cite

Distribution of rose bengal stained deep-sea benthic foraminifera from the Nova Scotian continental margin and Gulf of Maine

Journal Article Deep Sea Research Part A, Oceanographic Research Papers · January 1, 1990 Analysis of Rose Bengal stained benthic foraminifera in six boxcores taken from the Nova Scotian margin and Gulf of Maine reveals that foraminifera are vertically stratified within surficial sediments raised from 200 to 3000 m water depth. The consistent p ... Full text Cite

Morphotype analysis of deep-sea benthic foraminifera from the northwest Gulf of Mexico

Journal Article Palaios · January 1, 1990 An analysis of benthic foraminiferal morphotypes, based on test shape, mode of coiling and presence or absence of surface pores, was carried out on benthic foraminiferal data collected from the Gulf of Mexico. The morphotypes show distinct depth patterns a ... Full text Cite

The influence of microhabitats on the carbon isotopic composition of deep-sea benthic foraminifera

Journal Article Paleoceanography · 1990 We report δ13C and δ18O values for Rose Bengal-stained benthic foraminifera from a set of box cores from continental margin environments in the Atlantic and Pacific oceans. These isotopic results are compared with foraminiferal distribution data and pore w ... Cite

The position of the gulf stream during quaternary glaciations.

Journal Article Science (New York, N.Y.) · July 1988 Ocean general circulation theories predict that the position of the boundary between subtropical and subpolar gyres (and therefore the position of the Gulf Stream-North Atlantic Current system and the subpolar-subtropical front) is set by the line of zero ... Full text Cite

Morphotype patterns of Norwegian Sea deep-sea benthic foraminifera and ecological implications

Journal Article Geology · January 1, 1988 Deep-sea benthic foraminifera from Norwegian Sea surface sediments are classified into morphotypes on the basis of test shape and nature of test coiling and show distinct patterns with water depth. The morphotype data are used to determine microhabitat pat ... Full text Cite

RECENT ADVANCES IN BENTHIC FORAMINIFERAL ECOLOGY: IMPLICATIONS FOR OIL EXPLORATION.

Journal Article Oceans Conference Record (IEEE) · 1987 Summary form only given. The benthic foraminifera have species-specific microhabitats with distinctly different test morphologies: plano-convex or bioconvex forms are found at the surface, and rounded planispheral and cylindrical forms are infaunal and are ... Cite

Calcium carbonate undersaturation of bottom waters in the South Australian Basin during the last 3.2 million years.

Journal Article Journal of Foraminiferal Research · 1987 Analyzed deep-sea benthic foraminifera from 3 Eltanin piston cores to infer deep-water circulation in the W South Australian Basin during the past 3.2 Ma. During the Gauss and early to middle Matuyama chrons, Epistominella umbonifera was the dominant speci ... Cite

Late Quaternary deep-ocean circulation.

Journal Article Geological Society of America Bulletin · December 1, 1986 A review of paleoceanographic studies dealing with late Quaternary deep-water circulation in the oceans is presented. These studies, which are based on the analysis of deep-sea benthic foraminiferal faunal and geochemical data and sedimentological data, ar ... Full text Cite

Late eocene-early oligocene carbonate sedimentation in the deep sea

Journal Article Developments in Palaeontology and Stratigraphy · January 1, 1986 Calcium carbonate accumulation rate patterns for the late Eocene-early Oligocene interval in 12 DSDP sites show inter- and intra-basin variations. Significant increases in calcium carbonate accumulation at the Eocene/Oligocene boundary are seen at Sites 77 ... Full text Cite

Stable isotopes in late middle Eocene to Oligocene foraminifera.

Journal Article Geological Society of America Bulletin · 1986 Oxygen and carbon isotope ratios in Eocene and Oligocene planktonic and benthic foraminifera have been investigated from Atlantic, Indian, and Pacific Ocean locations. The major changes in Eocene-Oligocene benthic foraminiferal oxygen isotopes were enrichm ... Full text Cite

Eocene-Oligocene paleoceanography

Journal Article Mesozoic and Cenozoic oceans · January 1, 1986 Recent studies of Eocene-Oligocene paleoceanography based on the analysis of deep-sea microfossils are reviewed. Distinct changes in foraminiferal stable isotope compositions and biotic patterns occurred in the ocean near the Eocene/Oligocene boundary, but ... Full text Cite

Late Eocene-early Oligocene carbonate sedimentation in the deep sea.

Journal Article Terminal Eocene events · 1986 Calcium carbonate accumulation rate patterns for the late Eocene-early Oligocene interval in 12 DSDP sites show inter- and intra-basin variations. In general, the observed changes in carbonate accumulation rates follow the patterns established for fluctuat ... Cite

Late Quaternary deep-ocean circulation.

Journal Article Geological Society of America Bulletin · January 1, 1986 A review of paleoceanographic studies dealing with late Quaternary deep-water circulation in the oceans is presented. These studies, which are based on the analysis of deep-sea benthic foraminiferal faunal and geochemical data and sedimentological data, ar ... Full text Cite

Stable isotopes in late middle Eocene to Oligocene foraminifera.

Journal Article Geological Society of America Bulletin · 1986 Oxygen and carbon isotope ratios in Eocene and Oligocene planktonic and benthic foraminifera have been investigated from Atlantic, Indian, and Pacific Ocean locations. The major changes in Eocene-Oligocene benthic foraminiferal oxygen isotopes were enrichm ... Full text Cite

Microhabitats of benthic foraminifera within deep-sea sediments

Journal Article Nature · December 1, 1985 Benthic foraminifera are protozoans found throughout the deep-sea environment, secreting a test of calcium carbonate or constructing a test of cemented sediment particles (agglutinated or arenaceous foraminifera). In typical deep-sea sediments, the organic ... Full text Cite

High resolution isotope study of the latest deglaciation based on Bermuda Rise cores

Journal Article Quaternary Research · 1984 A stable isotope and 14C investigation of carbonates from three late Quaternary cores with high rates of sedimentation from the northeastern Bermuda Rise has produced the highest resolution record of the glacial maximum to Holocene stable isotope change ye ... Cite

The Eocene/Oligocene boundary event in the deep sea

Journal Article Science · January 1, 1984 Analysis of middle Eocene to early Oligocene calcareous and siliceous microfossils shows gradual biotic changes with no massive extinction event across the Eocene/Oligocene boundary. Biotic changes in the late Paleogene appear to reflect changing paleoclim ... Full text Cite

Distribution of Holocene deep-sea benthonic foraminifera in the southwest Indian Ocean

Journal Article Deep Sea Research Part A, Oceanographic Research Papers · 1983 The distribution of deep-sea benthonic foraminifera in core top samples from the southwest Indian Ocean is examined. Principal component analysis reveals two major assemblages. One assemblages between 3600 and 4800-m water depth is dominated by Episominell ... Cite

Carbonate sedimentation beneath the Antarctic Circumpolar Current during the late Quaternary

Journal Article Marine Geology · 1983 Calcium-carbonate content and planktonic foraminiferal fragmentation have been studied in four late Quaternary "Eltanin" piston cores (E48-22, E48-28, E49-18 and E49-23) taken from the Southeast Indian Ridge between 3200 and 3400 m waterdepth beneath the A ... Cite

Carbonate sedimentation beneath the Antarctic Circumpolar Current ( Indian Ocean).

Journal Article Antarctic Journal of the United States · 1983 Calcium carbonate sedimentation beneath the Antarctic Circumpolar Current (ACC) was studied based on the analysis of four USNS Eltanin cores taken between 38 and 43o S latitude in the SE Indian Ocean sector of the Southern Ocean. Calcium carbonate content ... Cite

Quaternary circulation of the Antarctic circumpolar current

Journal Article Deep Sea Research Part A, Oceanographic Research Papers · 1983 Deep-sea benthonic foraminiferal data from four Eltanin piston cores (E48-22, E48-28, E49-18, E49-23) are used to determine deep-water circulation conditions in the Southern Ocean during the last 450,000 years. The faunal data exhibit glacial-interglacial ... Cite

Linkage of North Atlantic and Southern Ocean deep-water circulation during glacial intervals

Journal Article Nature · 1982 The Antarctic Circumpolar Current (ACC) is one of the major current systems in the world ocean, affecting circulation in all of the major ocean basins. The ACC flows eastwards around ATA from the surface to ∼4,000 m depth with a transport on the order of 1 ... Full text Cite

Benthonic foraminiferal faunal and isotopic data for the postglacial evolution of the Champlain Sea

Journal Article Quaternary Research · 1982 Benthonic foraminiferal faunal and isotopic data from Champlain Sea sediments (approximately 12,500 to 10,000 yr B.P. in age) in two piston cores from Lake Champlain provide a detailed, apparently continuous record of the evolution of the Champlain Sea. Ca ... Cite

Deep-sea benthonic foraminiferal faunal turnover near the Eocene/Oligocene boundary

Journal Article Marine Micropaleontology · 1981 Eocene-Oligocene deep-sea benthonic foraminifera in D.S.D.P. Site 277 in the southwest Pacific have been analyzed to determine the benthonic foraminiferal response to the development of the psychrosphere near the Eocene/Oligocene boundary. Biostratigraphic ... Cite

Carbon and oxygen isotopic disequilibria of recent deep-sea benthic foraminifera

Journal Article Marine Micropaleontology · 1981 The carbon and oxygen isotopic compositions of 149 samples of benthic foraminifera from deep-sea core tops indicate that none of the nine species studied secrete calcium carbonate in isotopic equilibrium with ambient bottom water. Uvigerina, Pyrgo murrhina ... Cite

Quaternary paleocirculation of the Antarctic circumpolar current.

Journal Article Antarctic Journal of the United States · 1981 The history of the Antarctic Circumpolar Current (ACC) during the Quaternary is examined by analyzing deep-sea benthonic foraminifera in four sediment cores from the southeast Indian Ocean sector of the Southern Ocean. The data for core E40-18 are presente ... Cite

The use of phillipsite in test construction of agglutinated deep- sea benthonic foraminifera.

Journal Article Sedimentology · 1981 Agglutinated deep-sea benthonic foraminifera with tests composed of phillipsite are documented and illustrated from a red clay sequence in a Giant Piston Core from the central North Pacific. Associated with the benthonic foraminifera are phillipsite crysta ... Cite

Recent deep-sea benthonic for aminiferal distributions in the southeast Indian Ocean: Inferred bottom-water routes and ecological implications

Journal Article Marine Geology · 1979 Deep-sea benthonic foraminifera have been quantitatively examined from a suite of 64 trigger-core tops in the southeast Indian Ocean between 25-50° S and 80-140° E to evaluate their possible relationships with deep-sea water masses. Factor analysis of the ... Cite

Quaternary Antarctic Bottom-Water history: Deep-sea benthonic foraminiferal evidence from the southeast Indian Ocean

Journal Article Quaternary Research · 1979 Distinct assemblages of Recent deep-sea benthonic foraminifera from the southeast Indian Ocean have been shown to be associated with Antarctic Bottom Water (AABW) and Indian Bottom Water (IBW). The AABW assemblage is divided into two groups. One is dominat ... Cite

Cenozoic sedimentation in the central North Pacific [11]

Journal Article Nature · 1979 The central North Pacific, one of the largest sedimentary provinces in the world ocean, is covered by red clays and abundant manganese nodules 1,2. Few studies have focused on the sedimentation history in this area, presumably because of the difficulty of ... Full text Cite

Response of deep-sea benthonic foraminifera to development of psychrosphere near Eocene/ Oligocene boundary.

Journal Article Antarctic Journal of the United States · 1979 Benthic foraminifera in 15 closely spaced sediment samples were examined. Biostratigraphic ranges for 41 taxa are shown in a figure. A majority of the species show no response to the inferred temperature change; only two faunal changes conicided with the p ... Cite

Response of deep-sea benthonic Foraminifera to development of the psychrosphere near the Eocene/Oligocene boundary [9]

Journal Article Nature · 1979 A dominant feature of present-day thermohaline circulation in oceans is the production of cold Antarctic Bottom Water (AABW) in the Weddell and Ross Seas and along the continental margin off Antarctica. The cold, dense AABW formed at or near the surface si ... Full text Cite

Late pleistocene paleoclimatology: Planktonic foraminiferal analyses of sediment cores from the central North Atlantic

Journal Article Palaeogeography, Palaeoclimatology, Palaeoecology · 1975 Planktonic foraminiferal analyses of six deep-sea sediment cores from the central North Atlantic east of the Azores Islands between 37°N and 40°N show distinct oscillations in planktonic foramineferal assemblages during the last 300,000 years. A paleoclima ... Cite