Spelling suggestions: "subject:"lakesediments"" "subject:"paleosediments""
21 |
Zinc and copper isotopes as tracers of anthropogenic contamination in a sediment core from an urban lakeThapalia, Anita, January 2009 (has links)
Thesis (M.S.)--University of Texas at El Paso, 2009. / Title from title screen. Vita. CD-ROM. Includes bibliographical references. Also available online.
|
22 |
Reconsidering the pre-industrial mercury cycle using lake sediment archivesCooke, Colin Alexander. January 2010 (has links)
Thesis (Ph.D.)--University of Alberta, 2010. / Title from PDF file main screen (viewed on July 13, 2010). A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Doctor of Philosophy, [Department of] Earth and Atmospheric Sciences, University of Alberta. Includes bibliographical references.
|
23 |
The dynamics of shoreline wetlands and sediments of northern Lake VictoriaAzza, Nicholas. January 1900 (has links)
Thesis (doctoral)--Wageningen University and the Academic Board of the UNESCO-IHE Institute for Water Education, 2006. / "Propositions" ([1] leaf) inserted. Vita. Includes bibliographical references.
|
24 |
Late-glacial and postglacial vegetation history of Cape Cod and the paleolimnology of Duck Pond, South Wellfleet, MassachusettsWinkler, Marjorie Green. January 1982 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1982. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 101-111).
|
25 |
Methane production in sediments of Lake WingraBarber, Lynn Eileen. January 1974 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1974. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
|
26 |
Deciphering Phosphorus and Aluminum Physiochemical Associations in Paleolake Sediments of Long Pond, GATidwell, Christopher 12 August 2016 (has links)
This study focuses on Long Pond, a groundwater-fed sinkhole lake in Georgia, which does not exhibit any evidence of eutrophication drivers despite high concentrations of sedimentary phosphorus (P) (> 3000 mg/kg P) in the recent sediment record. Chemical analyses have shown a strong correlation (r2>0.99) between P and aluminum (Al) throughout the core, suggesting Al plays a significant role in sequestering most of the P, and limiting its availability to phytoplankton, thereby inhibiting eutrophication. The purpose of this study is to decipher P and Al physicochemical associations in the sediments. After the samples were fractionated into amorphous and non-amorphous phases, the correlation was maintained in both phases. Evidence suggests two modes of Al-P associations: a sorption and/or co-precipitation occurring mostly in the amorphous phase and a mode whereby Al and P are being inputted to the lake bound together.
|
27 |
Geochemical signatures of parent materials and lake sediments in northern MinnesotaMellicant, Emily January 1900 (has links)
Master of Arts / Department of Geography / Kendra K. McLauchlan / The importance of local parent material has been recognized as a fundamental control on the geochemistry of lake sediments, but there have been relatively few broad-scale surveys of catchment sources of terrigenous lake sediments.
In this paper, I present a geochemical study of catchment parent materials and lake sediments from four lakes in Northern Minnesota. Similar climate and vegetation conditions are present at all four lakes, which vary mainly in catchment parent material and lake morphometry. Geochemical data including major, trace and rare earth elements (REEs) from catchment parent material samples was compared with lake sediment geochemical data using PCA, linear regression, geological indices and elemental ratios.
In homogenous till-dominated catchments, patterns of elemental variation in the catchment till could be extended to predict elemental concentrations in the lake sediments. Simple ratios, which are commonly used to analyze lake sediment geochemical data, were not good predictors of lake sediment composition, however. Catchments with mixed bedrock and till were compositionally heterogeneous, and comparison with lake sediments was difficult. Lack of grain size control and biogenic silica measurements further confounded analysis. However, ΣREE/Y ratio was found to be diagnostic of the catchment parent materials and present within the lake sediments.
This study makes a contribution to an improved understanding of lacustrine sedimentary archives by analyzing the spatial linkages among catchment, water and sedimentary geochemistry.
|
28 |
Rooted aquatic macrophytes and the cycling of littoral zone metalsJackson, Leland J. (Leland Joseph) January 1992 (has links)
No description available.
|
29 |
Environmental and climatic implication of a grain size record from theLake Manas, Xinjiang, ChinaOr, Kwok-lap., 柯國立. January 2010 (has links)
published_or_final_version / Applied Geosciences / Master / Master of Science
|
30 |
Optical dating of young lacustrine sediment from Manas Lake in northwestern ChinaWang, Ruochen, 王若辰 January 2014 (has links)
abstract / Earth Sciences / Master / Master of Philosophy
|
Page generated in 0.3264 seconds