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Calcium carbonate, organic carbon, and quartz in hemipelagic sediments off Oregon : a preliminary investigation

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dc.contributor.advisor Kulm, LaVerne Duane
dc.creator Peterson, Robert E.
dc.date.accessioned 2010-01-29T15:39:25Z
dc.date.available 2010-01-29T15:39:25Z
dc.date.issued 1969-07-07
dc.identifier.uri http://hdl.handle.net/1957/14153
dc.description Graduation date: 1970 en
dc.description.abstract An analysis of the amounts of calcium carbonate, organic carbon, quartz, and the rates of sediment accumulation in hemipelagic sediments off Oregon has revealed that the accumulation rates of the total sediment, organic carbon, and quartz were at least twice as high in the late Pleistocene as they were during the Holocene. The accumulation rate of calcium carbonate was at least 8 times as high. There may have been a short transition period at the end of the last glacial stage from about 14,000 to 12,500 years B.P. when the sedimentation rate was very high up to 75 cm/l000 years. There is evidence that the amount of organic carbon in deep-sea sediments is a function of terrigenous influx, of preservation, and possibly of depth of burial in the sediment. Turbidite sequences in the deep-sea environment off Oregon contain much higher amounts of organic carbon in the upper fine-grained portion of the sequence than in the coarser basal sediment of the sequence, indicating that organic carbon is concentrated in the finer and slower settling parts of the flow. In lower continental slope sediments, the greatest amounts of organic carbon are found in the <4 micron size fraction. en
dc.language.iso en_US en
dc.relation Explorer Site::Oregon Explorer en
dc.subject.lcsh Marine sediments -- Pacific Coast en
dc.title Calcium carbonate, organic carbon, and quartz in hemipelagic sediments off Oregon : a preliminary investigation en
dc.type Thesis/Dissertation en
dc.degree.name Master of Science (M.S.) in Oceanography en
dc.degree.level Master's en
dc.degree.discipline Oceanic and Atmospheric Sciences en
dc.degree.grantor Oregon State University en
dc.description.digitization Master files scanned at 600 ppi (256 Grayscale) using Capture Perfect 3.0.82 on a Canon DR-9080C in TIF format. PDF derivative scanned at 300 ppi (256 B&W), using Capture Perfect 3.0.82, on a Canon DR-9080C. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR. en

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