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Planktonic Foraminifera
The Globigerinina is a suborder of foraminiferans that are found as marine plankton. They produce hyaline calcareous tests, and are known as fossils from the Jurassic period onwards. The group has included more than 100 genera and over 400 species, of which about 30 species are extant. One of the most important genera is ''Globigerina''; vast areas of the ocean floor are covered with ''Globigerina'' ooze (named by Murray and Renard in 1873), dominated by the shells of planktonic forms. Description Globigerinids are characterized by distinctly perforate planispiral or trochospiral tests composed of lamellar radial hyaline (glassy) calcite, with typically globular chambers and single interiomarginal aperture. Some however have multiple or auxiliary apertures, and in some the aperture is areal or terminal in location. Some, also, have keels, reinforcing thickenings along exterior angles. An adaptation to the planktonic habit is the development of long narrow spines that support ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelagic Sediments
Pelagic sediment or pelagite is a fine-grained sediment that accumulates as the result of the settling of particles to the floor of the open ocean, far from land. These particles consist primarily of either the microscopic, calcareous or siliceous shells of phytoplankton or zooplankton; clay-size siliciclastic sediment; or some mixture of these. Trace amounts of meteoric dust and variable amounts of volcanic ash also occur within pelagic sediments. Based upon the composition of the ooze, there are three main types of pelagic sediments: siliceous oozes, calcareous oozes, and red clays.Rothwell, R.G., (2005) ''Deep Ocean Pelagic Oozes'', Vol. 5. of Selley, Richard C., L. Robin McCocks, and Ian R. Plimer, Encyclopedia of Geology, Oxford: Elsevier Limited. HüNeke, H., and T. Mulder (2011) ''Deep-Sea Sediments''. Developments in Sedimentology, vol. 63. Elsiever, New York. 849 pp. The composition of pelagic sediments is controlled by three main factors. The first factor is the dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassigerinellidae
Cassigerinellidae is an extinct family of foraminifera belonging to the superfamily Guembelitrioidea and the suborder Globigerinina The Globigerinina is a suborder of foraminiferans that are found as marine plankton. They produce hyaline calcareous tests, and are known as fossils from the Jurassic period onwards. The group has included more than 100 genera and over 400 spec .... Genera It includes the genera '' Cassigerinella'' and '' Riveroinella''. References External links * ForaminiferidaChapter 18: Taxonomy, Biostratigraph, and Phylogeny Of Oligocene Cassigerinella, Published: January 31, 2018 Foraminifera families Globigerinina {{Foraminifera-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truncorotaloididae
Truncorotaloididae is a family of foraminifera belonging to the superfamily Globorotalioidea in the suborder Globigerinina and the order Rotaliida.Truncorotaloididae World Foraminifera Database, accessed 27 November 2018 It is found in marine sediments from the middle to the upper . Genera The family contains the following genera: * ''Acarinina
AcarininaSubbotina, N. N. (1953). Iskopae ...
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