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Showing 1 to 19 of 19 for “"ostracodes"”.
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Some Richmond (Ordovician) Ostracodes From Indiana and Ohio
Made available in DSpace on 2014-12-04T19:14:17Z (GMT). No. of bitstreams: 1 6206146.pdf: 4365043 bytes, checksum: b9b55655365f6ccb80aa716ce452cdc1 (MD5) Previous issue date: 1962
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Ostracodes From the Henryhouse Formation (Silurian) of Oklahoma
Made available in DSpace on 2014-12-04T19:14:22Z (GMT). No. of bitstreams: 1 6303297.pdf: 3185676 bytes, checksum: e6b1344d965e21f8dfd6e2c0b1772d14 (MD5) Previous issue date: 1962
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Ostracodes of the Piney Point formation (middle eocene) of Virginia
… Formation is time-transgressive, because the ostracodes from the type locality are strictly middle Claibornian (Brown et al., 1972). The ostracode assemblage of the Piney Point is typical of one inhabiting warm, clear, open marine waters with a slow sedimentation rate and little reworking.
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Argilominerais e ostracodes da Formação Alagamar (cretáceo inferior), Bacia Potiguar, NE - Brasil : paleoambiente e indicadores térmicos
… (IIE) e cloritalesmectita (CIE). As carapaças de ostracodes identificadas correspondem a espécies nãomarinhas de três famílias mais comuns no Cretáceo: Cyprididae, Limnocytheridae e Darwinulidae. A avaliação estatística da composição ontogenética das espécies fósseis, tomou-se útil neste trabalho …
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Morphology and Ontogeny of Some Ostracodes From the Bromide Formation (Middle Ordovician) of the Simpson Group of Oklahoma
Made available in DSpace on 2014-12-09T20:34:08Z (GMT). No. of bitstreams: 1 6406072.pdf: 6084238 bytes, checksum: e303be37d6f826edb0a5fc59c38f207e (MD5) Previous issue date: 1963
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Paleogeography and Paleoenvironments of the Lower Unit, Fossil Butte Member, Eocene Green River Formation, Southwestern Wyoming
… carbonates contain well preserved fossil fish, ostracodes, molluscs and the kerogen that was produced mainly by algae. These rocks grade towards the margins into micrites that become more bioturbated closer to the margin of the lake, as well as into ostracodal and gastropodal limestones. …
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The response of wetlands to sea level rise: Ecologic, paleoecologic, and taphonomic models
… but are absent in fresh marsh sediments. Ostracodes and diatoms occur in all marsh types, but ostracodes are sporadically preserved and diatom thanatocoenoses from different environments become too similar to significantly indicate different biocoenoses. A combined thanatocoenosis composed …
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Tertiary dinoflagellate, acritarch, and chlorophyte assemblages from the Oak Grove Core, Virginia Coastal Plain
… by the calcareous nannofossils, Foraminifera, ostracodes, and pollen and spores for the Aquia strata; certain dinoflagellate and pollen species in the lowermost 11.5 m (37.9 ft), however, suggest this basal interval, devoid of other microfossils, could be Paleocene (Danian) in age. An Eocene …
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Campanian-Maestrichtian and Paleocene dinoflagellate and acritarch assemblages from the Maryland-Delaware Coastal Plain
… Maryland (Benson, 1975), and the ranges of ostracodes (Hazel, pers. comm., 1975) supports this conclusion. Species with stratigraphic ranges restricted to the Mount Laurel, Monmouth, or Brightseat Formation indicate the potential usefulness of dinoflagellates in zoning Atlantic Coastal Plain …
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Biologia e dinâmica populacional de Aegla leptodactyla Buckup & Rossi, 1977 (Crustacea, Anomura, Aeglidae)
… relacionados à zoogeografia e ecologia dos ostracodes da plataforma interna norte do Rio de Janeiro, próximo à cidade de Cabo Frio. O material de estudo resultou da análise de 43 amostras sedimentológicas coletadas durante a expedição GEOCOSTA RIO II. Este estudo permitiu o reconhecimento de …
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The micropaleontology and stratigraphy of the subsurface "Heath" formation (Mississippian-Pennsylvanian) of western North Dakota
… of the “Heath” Formation includes non-marine ostracodes, with which this study is primarily concerned, and non-marine pelecypods and syncarid crustaceans which occur in units intertonguing with strata containing marine brachiopods and pelecypods. Fossils occurring above the previously …
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Paleozoology of cores from the Tyler Formation (Pennsylvanian) in North Dakota, U.S.A.
… 2 annelids, 2 branchiopoda, at least 2 ostracodes, 2 malacostracans, 1 insect, and 1 echinoderm. Chordates include 1 "nonmarine" shark, at least 1 paleoniscoid fish, and 1 possible crossopterygian fish. A new genus and species of eocarid malacostracan is described and represents the …
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Depositional Environments of the Miocene Esmeralda Formation, Stewart Basin, Stewart Valley, Nevada
… and spores and none on the fish, algae, wood or ostracodes. Recently, seven lithostratigraphics units of the Esmeralda Formation have been mapped in Stewart Valley (Clausen, 1983).</p> <p>Detailed lithofacies are described in each of the seven lithostratigraphic units. Lithofacies 1 is composed …
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The Use of the Ostracode Cyprideis Americana (Sharpe) as a Proxy for Salinity in Bahamian Lake Systems
<p>Ostracodes, bi-valved crustaceans, are potentially excellent proxies for salinity.They are abundant, react to changes in salinity, and secrete low-magnesium calcite shells that preserve information about their host water chemistry. Changes in valve trace element concentration, stable isotope …
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Petrology of the basal middle Ordovician Blackford formation of the type belt, Russell County, Virginia
… This part contains algae algal stromatolites, ostracodes, bryozoa and rare trilobites. Nodular black chert is locally present in the uppermost part. The proportion of coarse clastics and dolomite decreases upward whereas the clay content increases abruptly in the upper beds. The new assemblage …
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Molluscan paleontology of the Pliocene Peace Valley "beds" and Ridge Route "formation" (Ridge Basin group), Ridge Basin, southern California
… Ridge Route "formation" (Wilson 1978). The ostracodes probably indicate a late Miocene age for the lower Ridge Basin Group; however, recent magnetostratigraphy suggests an early Pliocene age for the lowermost Ridge Basin Group (Ensley and Verosub 1979).</p>
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Genesis and Sedimentation of an Ice-Walled Lake Plain in Northeastern Illinois
… from its rhythmic bedding and fossil lacustrine ostracodes. The laminae were mainly deposited through grain settling from hypopycnal density currents, with the particle settling velocities revealing that the laminae were deposited in a short period of time (perhaps weekly or monthly), while …
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Interpretation of coarsening upwards hemicycles in the Upper Paleozoic rocks of South-central West Virginia
… limestones with abundant <em>Spirorbis</em>, ostracodes), d) levee-splay (silt shale, sandy siltstone with abundant burrows, root structures, and thinly interbedded sand- and mud-dominant units), e) crevasse (sandstone without any vertical decrease in grain size), and f) distributary and …