Radiolarian densities, diversities, and taxonomic composition in recent sediment and plankton of the southern California continental borderland: relationship to water circulation and depositional environments

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dc.contributor.advisorCasey, Richard E.en_US
dc.contributor.committeeMemberAnderson, John B.en_US
dc.contributor.committeeMemberClark, Howard C.en_US
dc.creatorCleveland, Michael N.en_US
dc.date.accessioned2018-12-18T21:15:50Zen_US
dc.date.available2018-12-18T21:15:50Zen_US
dc.date.issued1985en_US
dc.description.abstractThe California Current, the eastern limb of the North Pacific gyre, exhibits the following characteristics‘common to eastern boundary currents: wide, shallow, slow, diffuse boundaries, common upwelling, great seasonal variation, invasions of water masses from outside the system, and cold, low salinity waters. Studies on plankton tows and Holocene sediments have correlated components of the siliceous microplankton (radiolarians and some diatoms) with a number of those characteristics such as: the main directions of movement of the invading waters, the provenance of these waters, the presence and degree of upwelling, seasonality and its impact on the underlying sediments. Certain types of radiolarians have been found to be potentially useful in determining fossil anoxic and oxic conditions as well as paleodepth. This study involved analysis of box core sediment and plankton tow samples from the southern California continental borderland for radiolarian density, diversity, taxonomic makeup, and other features which were related to oceanographic and environmental conditions. Depositional environments were defined for the sediment samples and radiolarian indicators useful for paleoenvironmental interpretation were defined. A number of borderland environments were identified and the anoxic nearshore basin was found to have the best preservational qualities for radiolarians and thus the most representative radiolarian biocoenosis.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent97 ppen_US
dc.identifier.callnoThesis Geol. 1985 Clevelanden_US
dc.identifier.citationCleveland, Michael N.. "Radiolarian densities, diversities, and taxonomic composition in recent sediment and plankton of the southern California continental borderland: relationship to water circulation and depositional environments." (1985) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/103977">https://hdl.handle.net/1911/103977</a>.en_US
dc.identifier.digitalRICE1603en_US
dc.identifier.urihttps://hdl.handle.net/1911/103977en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.titleRadiolarian densities, diversities, and taxonomic composition in recent sediment and plankton of the southern California continental borderland: relationship to water circulation and depositional environmentsen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentEarth Scienceen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Artsen_US
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