How To Use Foraminifer In A Sentence
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The foraminifera in these dolomitized sediments are recrystallized, this means that the original calcite shells are replaced by dolomite.
Should Keller's Thin Sections Be Independently Tested? « Climate Audit
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These taxa consist of a broad array of organisms, including foraminifers, corals, bryozoans, mollusks, echinoderms, and fish.
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And like snail shells, most foraminiferan shells are also made of CaCO3.
Archive 2006-11-01
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Current thinking in the phylogeny of protists places the dinoflagellates in the Alveolates, along with the Apicomplexa, Ciliata, and Foraminifera.
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These zooxanthellae may be found in many marine invertebrates, including sponges, corals, jellyfish, and flatworms, as well as within protists, such as ciliates, foraminiferans, and colonial radiolarians.
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Our observations demonstrate that coccoliths, and probably also planktonic foraminiferan tests, reach the Challenger Deep intact," said Gooday.
PhysOrg.com - latest science and technology news stories
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Oceanographers have now identified no less than nine periods of intense cold over the past 900,000 years, as reflected by the characteristic shells of minute animals known as foraminifera found in cores drawn from the depths of the Pacific Ocean.
50 Years of Discovery
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But even if these forms turn out to be true foraminifers – and Arz et al 2004 have shown that there are a few reworked specimens in that core interval – then those occur in a cross-bedded sandstone and are, therefore, by definition reworked, and cannot be used for biostratigraphy.
Should Keller's Thin Sections Be Independently Tested? « Climate Audit
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Limestones of the underlying carbonate ramp sediments are primarily packstones containing numerous foraminiferans but they do not contain decapod fossils.
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As for biostratigraphy, the mass-extinction of foraminifers and nannofossils approximates the K/T boundary much more accurate.
Should Keller's Thin Sections Be Independently Tested? « Climate Audit
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Planktonic foraminifera can be used to obtain data relating to surface water temperatures and oceanic circulation patterns.
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Among the tiny sand grains was this tiny foraminiferan shell almost exactly a millimeter wide.
A shell of a different kind
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Microfossil assemblages from rare black and grey clays in this succession contain only a variety of seeds, Microcarpolithes hexagonalis and megaspores, and there are neither foraminifera nor other marine microfossils.
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The foraminifera analysed in this study are generally well preserved and not recrystallized.
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Like the rest of the world's seas, the Sargasso Sea has a population of the subsurface algae called coccoliths as well as planktonic foraminifera.
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Feb 12 (ANI): Evidence from the deepest surveyed point in the world's oceans has suggested that tiny single-celled creatures called foraminifera living at extreme
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Subtidal lithologies contain peloids, ostracodes, bivalves, gastropods and oncoids (with less common benthic foraminifera and calcareous algae).
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Older than flowers, older than ferns, older than foraminiferae, older than plasm altogether is the soul underneath.
Judith Johnson: Finding A Deeper Love This Valentine's Day
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From such studies as those of Be and Spero and Wilde, we know that foraminifera sometimes regenerate their tests after injury.
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A combination of two marine sediment records from the Arabian Sea in which the percentage of the foraminifera Globigerina bulloides reflects the extent of ocean up-welling, which is determined by the strength of monsoons, which in turn indirectly reflect both summer and winter large-scale temperature changes through the differential seasonal heating and cooling of the Asian continent and surrounding oceans.
Dongge Cave « Climate Audit
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There is also a group of distinctive foraminifera more or less confined to the zone of the Tethys and thought to be a stenothermal tropical group.
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The two major microorganisms whose remains are thus fossilised in chalk are foraminifera and the spikes and cells of calcareous algæ known as coccoliths and rhabdoliths.
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Thus, although mollusks and foraminiferans of the area have been studied extensively, additional collecting is necessary to fully describe the brachyuran fauna.
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A combination of two marine sediment records from the Arabian Sea in which the percentage of the foraminifera Globigerina bulloides reflects the extent of ocean up-welling, which is determined by the strength of monsoons, which in turn indirectly reflect both summer and winter large-scale temperature changes through the differential seasonal heating and cooling of the Asian continent and surrounding oceans… Although this record reflects temperatures only indirectly, it was included to improve the balance in the geographical distribution of proxy sites.
Moberg #5: Arabian Sea glob. bulloides « Climate Audit
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Based upon the presence of calcareous algae, benthic foraminifera and nudists, a lagoonal environment has been suggested for the upper part of the Ocozocuautla Formation.
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Mixed Devonian and Mississippian conodont and foraminiferal faunas and their bearing on the Roberts Mountains Thrust, Nevada,
CreationWiki - Recent changes [en]
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Original description: A combination of two marine sediment records from the Arabian Sea [Gupta et al 2003; Overpeck et al 1996] in which the percentage of the foraminifera Globigerina bulloides reflects the extent of ocean up-welling, which is determined by the strength of monsoons, which in turn indirectly reflect both summer and winter large-scale temperature changes through the differential seasonal heating and cooling of the Asian continent and surrounding oceans [Overpeck et al 1996].
Moberg's G. Bulloides « Climate Audit
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Steve M., some months back I linked to a California Current foraminifer study that showed things as fairly flat there through the MWP and LIA.
Allen and the "Cool" Medieval Pacific « Climate Audit
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Many foraminiferan shells tests look quite like snail shells.
A shell of a different kind
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The biological response to the monsoonal activity in the surface water column is preserved as increased abundance of the planktic foraminifer Globigerina bulloides…Advantages of this proxy are (1) its unique association with the summer monsoon (G. bulloides has a subpolar habitat and would be absent in the tropics except for wind-driven upwelling), (2) linear correlation with the surface cooling due to upwelling, apparently unbiased by other influences
Moberg #5: Arabian Sea glob. bulloides « Climate Audit
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In contrast, the many shale layers seem to be poor in macrofossils largely because they were deposited at depth below the photic zone (upper bathyal depth) as indicated by benthic foraminifera.
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Far from land in the deep sea, where little material comes from erosion of the land, the bottom sediment is made up mainly of shells of planktonic organisms, especially foraminifera.
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We acknowledge that virtually all Paleozoic calcareous foraminifers are diagenetically altered.
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The coarser fraction of chalk consists mainly of the skeletal debris of foraminifera, calcispheres, bivalve fragments, echinoid plates, and bryozoan, ostracod, and coral debris.
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Fossils include foraminiferans, brachiopods, echinoids, pelecypods, cephalopods, shark teeth, fish vertebrae, as well as asteroids, gastropods, a pterosaur, a nodosaurid, and decapods.
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We infer from our oxygen isotope measurements in planktonic foraminifera that the Larsen B ice shelf has been thinning throughout the Holocene, and we suggest that the recent prolonged period of warming in the Antarctic Peninsula region, in combination with the long-term thinning, has led to collapse of the ice shelf.
Answers to the House Committee on Cross-Validation Statistics « Climate Audit
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Tube walls have simple pores and are constructed of radiolarian and foraminiferan tests, sand grains and/or fragments of sponge spicules, connected by a cement of some kind.
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If you the sleeplessly cartwheel as it is, you viscacha, in my retinal, an numbfish to miscreant the observingly sheldrake foraminifera steinbeck. tensity ellipsoidal, disobediently kubrick, from cold aegilops ballroom to hoist, to streptokinase, to dextrality with jabberwocky fibrin and guardant cliquishness.
Rational Review
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For example, the pink sands of Bermuda get their color from the shells of a foraminiferan called Homotrema rubrum which has pink to red-colored shells.
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Fossils include foraminiferans, brachiopods, echinoids, pelecypods, cephalopods, shark teeth, fish vertebrae, as well as asteroids, gastropods, a pterosaur, a nodosaurid, and decapods.
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Microfossil assemblages from rare black and grey clays in this succession contain only a variety of seeds, Microcarpolithes hexagonalis and megaspores, and there are neither foraminifera nor other marine microfossils.
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The succession was sampled for biostratigraphic analysis using foraminifera and nannoplankton.
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It has been estimated that a large 150 micron wide shell of a foraminifer may take as long as 10 days to sink to the bottom of the ocean, whereas smaller ones would probably take much longer.
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Foraminiferal biostratigraphy and paleoenvironmental reconstruction at Yaxcopoil-1 drill hole Chicxulub crater, Yucatan Peninsula.
Should Keller's Thin Sections Be Independently Tested? « Climate Audit
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This beach is famous for its "star-sand," made up of tiny sea animals called foraminifera, which are formed from single-celled protozoa that produce calcium carbonate shells.
Breathtaking Beaches © Corbis Cleopatra's Beach Sedir...
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This, indeed, is why oil companies employ fossil experts to identify particular strata of rocks, usually by microfossils, tiny creatures called foraminifera, for example, or radiolaria.
THE GREATEST SHOW ON EARTH
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These micro-organisms are found in just a few pieces of amber among the thousands that have been studied, but show a remarkable diversity: unicellular algae, mainly diatoms found in large numbers, traces of animal plankton, such as radiolaria and a foraminifer, spiny skeletons of sponges and of echinoderms.
Signs of the Times
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It contains a large number of mostly amoeboid organisms, including such significant groups as the radiolarians and foraminiferans.
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These zooxanthellae may be found in many marine invertebrates, including sponges, corals, jellyfish, and flatworms, as well as within protists, such as ciliates, foraminiferans, and colonial radiolarians.
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18O values of the planktonic foraminifera Globigerina bulloides and the development of the polar foraminifera Neogloboquadrina pachyderma (s.) left coiling.
PLoS ONE Alerts: New Articles
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Two years later, he met Thomas Rupert Jones, the retired Professor of Geology at the Royal Military College, Sandhurst, who asked Sherborn for help with papers he was writing on microscopic fossils known as foraminifera.
Telegraph.co.uk - Telegraph online, Daily Telegraph and Sunday Telegraph
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In this core, a 100m thick impact breccia underlies 50 cm of bedded dolomitic limestone with diverse planktic foraminiferal assemblages of zone CF1 that spans the last 300 ka of the Maastrichtian.
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Different types of foraminifera thrive at different temperatures.
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The fundamental structure of the proloculus is the innermost part of the spirally arranged shell; it resembles the involute type of planispirally arranged foraminifera tests.
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The dinosaurs were only one of the groups that became extinct at the end of the Cretaceous; also hard-hit were the unicellular Foraminifera, the ammonites, and marine reptiles such as the mosasaurs and plesiosaurs.
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The fossil content consists of ammonites, belemnites, brachiopods, echinoderms, bivalves, crinoids, gastropods, ostracodes and benthic foraminifers.
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Also, other microfossils such as diatoms, radiolaria, and planktonic and benthic foraminifera are useful in certain parts of the Palaeocene.
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It may seem a small thing to admit that the dull vital actions of a fungus, or a foraminifer, are the properties of their protoplasm, and are the direct results of the nature of the matter of which they are composed.
Autobiography and Selected Essays
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Foraminifera, or forams, are abundant marine and freshwater amoebae with granulose, reticulating pseudopodia.
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These taxa consist of a broad array of organisms, including foraminifers, corals, bryozoans, mollusks, echinoderms, and fish.
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The taphonomy and paleoecology of this giant foraminiferan are briefly evaluated based on comparison with modern examples of Bathysiphon and with other Cretaceous examples from the same region.
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Australian researchers recently analyzed shells of modern plankton, called foraminifera, which teem by the billions in the Southern Ocean surrounding Antarctica.
A Look Into Future Oceans for Shellfish Reasons
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The calcium carapace of microscopic animals called foraminifera living in the Southern Ocean, for example, have fallen in weight by a third.
PhysOrg.com - latest science and technology news stories
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The carbonate products are made up of oolitic grains, oolitic gravels, benthic foraminifers and crinoid ossicles, in decreasing order of abundance.
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In a Swedish fjord sediment where G. pseudospinescens is the dominant foraminifer, the intracellular nitrate pool in this species accounted for 20% of the large, cell-bound, nitrate pool present in an oxygen-free zone.
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The Gracisce packstones contain a rich foraminiferal assemblage, composed of larger and planktonic foraminifera along with authigenic glauconite.
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The team did not limit themselves to foraminifera but used other planktonic groups such as the coccoliths and radiolaria.
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Based on gastropods, bivalves, and planktonic foraminifera, Kilmer assigned this formation to the Turonian.
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The group that has been most commonly analysed morphometrically is the planktonic foraminifers, largely because of their well-established taxonomy and their optimal fossil record.
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Rising carbon dioxide levels acidify the ocean, which has a particularly devastating effect on organisms that have calcium carbonate shells, like Foraminifera.
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The researchers were therefore surprised to discover that foraminiferan tests sampled from the Challenger Deep contained calcareous components, including the dissolved remnants of coccoliths, the calcium carbonate plates of tiny algae called coccolithophores, and planktonic foraminiferan test fragments.
Innovations-report
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During that first year in the oil business, Smith shared an office with a paleontologist who worked with the microfossils (mostly foraminifera) that are used to age-date the rock units of the Texas Gulf Coast.
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The scientists used cores of ocean sediment containing fossils of microscopic shelled organisms called foraminifera to reconstruct past water temperatures in the strait.
NYT > Home Page
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(H) Abundances of the foraminifer Globigerina bulloides in Cariaco Basin sediments are higher during glacial advances indicating stronger trade winds (20).
LIA and MWP in Venezuela « Climate Audit
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In the seas, the calcareous nannofossils were still in evidence but in shallow waters the benthonic nummulite and other larger foraminifera became very abundant.
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Relative abundance variations of the planktic foraminifer Globigerinoides sacculifer and àŽàⲱ8O measured G. ruber white variety in core PBBC1 plotted against calibrated years.
Gulf of Mexico SST Proxy « Climate Audit
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They agglutinate particles including volcanic fragments, foraminifera (a type of single-celled animal) and glass chips to form a test which can be up to 25cm.
Seamount
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Although foraminiferans are known for certain since the earliest Cambrian, their diversity and variability during the Cambrian is limited to a few agglutinated unilocular genera.
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The fossil content consists of ammonites, belemnites, brachiopods, echinoderms, bivalves, crinoids, gastropods, ostracodes and benthic foraminifers.
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If these sediments become cemented together, they form foraminiferan limestone that is exposed in cliffs and often creates overhanging ledges that provide excellent habitat for fish.
