Radiolaria in the Holocene sediment of the Gulf of Mexico and the basins off southern California: assemblage changes with water depth and eutrophism
| dc.contributor.advisor | Casey, Richard E. | |
| dc.contributor.committeeMember | Anderson, John B. | |
| dc.contributor.committeeMember | Clark, Howard C. | |
| dc.creator | Wigley, Cynthia R. | |
| dc.date.accessioned | 2018-12-18T21:16:27Z | |
| dc.date.available | 2018-12-18T21:16:27Z | |
| dc.date.issued | 1982 | |
| dc.description.abstract | Radiolarian assemblages in Holocene sediments from the Gulf of Mexico and Caribbean and the southern California borderland reflect overlying oceanographic conditions, such as general productivity, upwelling, and preservational parameters. A reconnaissance investigation of the lateral variations in the radiolarian assemblage with increasing water depth indicates that the changes are not consistent enough in either region for the establishment of a definite depth zonation; however a number of radiolarian species and higher taxa show some general trends with depth. Symbiotic taxa, and spumellaria in general, are more abundant in the thanatocoenosis of the Gulf region than off California and are indicative of oligotrophic conditions. Low oxygen content and high dissolved silica concentration in the bottom water of the Gulf of Mexico's Orca Basin lead to good preservation in this locality. Diversity, up to the family level, is greater in the California assemblages due to a mixing of radiolarian faunas and better preservation. There are more deep-water radiolarian taxa present at shallower depths, and all depths, in the California assemblages as compared to those of the Gulf due to more dynamic upwelling conditions which enhance these species both in the biocoenosis and thanatocoenosis. | |
| dc.format.digitalOrigin | reformatted digital | |
| dc.format.extent | 148 pp | |
| dc.identifier.callno | Thesis Geol. 1982 Wigley | |
| dc.identifier.citation | Wigley, Cynthia R.. "Radiolaria in the Holocene sediment of the Gulf of Mexico and the basins off southern California: assemblage changes with water depth and eutrophism." (1982) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104032">https://hdl.handle.net/1911/104032</a>. | |
| dc.identifier.digital | RICE1658 | |
| dc.identifier.uri | https://hdl.handle.net/1911/104032 | |
| dc.language.iso | eng | |
| dc.rights | Copyright 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. | |
| dc.title | Radiolaria in the Holocene sediment of the Gulf of Mexico and the basins off southern California: assemblage changes with water depth and eutrophism | |
| dc.type | Thesis | |
| dc.type.material | Text | |
| thesis.degree.department | Earth Science | |
| thesis.degree.discipline | Natural Sciences | |
| thesis.degree.grantor | Rice University | |
| thesis.degree.level | Masters | |
| thesis.degree.name | Master of Arts |
Files
Original bundle
1 - 1 of 1