Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Paleoproductivity"”.
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EASTERN EQUATORIAL PACIFIC PRODUCTIVITY VIA TWO GEOCHEMICAL PROXIES
… In order to determine this, additional oceanic paleoproductivity data collection is necessary to estimate the ocean’s feedback in response to a dynamic climate. The eastern equatorial Pacific (EEP) is an ideal site for productivity studies due to its high levels of nutrients and deep upwelling. …
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GEOCHEMICAL ANALYSIS OF THE EAGLE FORD SHALE IN WEBB AND DIMMIT COUNTIES, TX
… and assess controls on detrital influx, paleoproductivity, and redox conditions across multiple cores in Webb and Dimmit counties. Major, trace, and redox-sensitive elements were evaluated alongside Total Organic Content (TOC) and carbonate content to identify stratigraphic trends and …
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Changes in Antarctic Bottom Water Formation During Interglacial Periods
… When accounting for other factors, such as paleoproductivity, that can also decrease the oxygen concentrations in sedimentary porewater, it is possible to identify changes in AABW using authigenic uranium. The survey conducted by this study found a possible AABW reduction during late Marine …
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Dinoflagellate Cyst Biostratigraphy, Palynofacies and Paleoenvironmental Analysis of the Maastrichtian and Basal Danian, Brazon River, Texas
… increases in ?13C, suggestive of an increase in paleoproductivity. Two more peaks occur within Interval 3. Bottom water ?18O temperatures determined from benthic foraminifera and sea surface temperatures determined from TEX86 organic geochemistry show an overall cooling trend from Early …
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Trace element distributions in ridge flank sediments from the east Pacific Rise, and their use as proxies of past ocean conditions
… of the deep water). This is consistent with paleoproductivity data from other parts of the<br/>Eastern Pacific and adds new information of past conditions in a region which has not been studied.
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Constraining Respired Carbon Storage in the Eastern Tropical Pacific Over the Last 25 Thousand Years Using Benthic Foraminiferal Boron/Calcium Ratios
… (a dust flux proxy), excess barium (a paleoproductivity proxy), and aU from 17JC and MV1014-02-8JC (8JC) (6<strong>°</strong>14’N, 86<strong>°</strong>2’W; 2 km water depth) illustrate that two different mechanisms likely influenced CO<sub>2</sub> storage in the region. For 8JC, a …
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Cenozoic deep-water agglutinated foraminifera in the North Atlantic
… rise in the lysocline associated with increased paleoproductivity and the NP14 sealevel lowstand. The Eocene/Oligocene boundary is delimited by another major turnover and the last occurrence of a number of important taxa. At Site 647, where recovery across the Eocene/Oligocene boundary was …