Browsing by Department "Earth and Environmental Sciences"
Now showing items 1-20 of 63
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(2019-07-19)Department: Earth and Environmental SciencesThe Ganges and Brahmaputra rivers transport over one billion tonnes of sediment across the Ganges-Brahmaputra-Meghna river delta (GBMD) plain each year. We investigate stratigraphic and bulk geochemical data for over 4,500 ...
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(2019-07-17)Department: Earth and Environmental SciencesThe decision to migrate is complex and is often influenced by a combination of economic, social, political, and environmental pressures. Seasonal, internal migration is a common strategy for livelihood diversification in ...
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(2014-07-22)Department: Earth and Environmental SciencesThe state of Meghalaya in NE India is a vibrant landscape where people’s livelihoods are intimately tied to the regional geology and seasonal climate. The climate of Meghalaya is defined by the Indian Summer Monsoon (ISM), ...
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(2018-07-21)Department: Earth and Environmental SciencesAustralia’s geological and paleontological record shows long-term aridification, making it a particularly interesting system in which to assess long-term responses to climate change. Geochemical analyses of tooth enamel, ...
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(2019-07-30)Department: Earth and Environmental SciencesI apply the speleothem δ44/40Ca rainfall proxy to a fast growing stalagmite from White Moon Cave (WMC) on the California coast that grew during the 8.2 kyr event. Variability in speleothem δ44/40Ca is controlled by ...
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(2015-03-20)Department: Earth and Environmental SciencesDue to the climate effects and aviation threats of volcanic eruptions, it is important to accurately locate ash in the atmosphere. This study aims to explore the accuracy and reliability of training a neural network to ...
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(2013-12-02)Department: Earth and Environmental SciencesThis project attempts to identify the source of surface water and groundwater salinity observed in a polder in southwest Bangladesh through geochemical analyses. All surface water samples are mixtures of tidal channel ...
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Characterizing temporal and spatial trends in soil geochemistry on Polder 32, southwest Bangladesh (2015-07-21)Department: Earth and Environmental SciencesSoil samples were collected during three field campaigns to determine seasonal and spatial trends of soil salinity, soil acidity and arsenic concentrations on Polder 32 in coastal Bangladesh. Many farmers on Polder 32 use ...
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(2015-04-06)Department: Earth and Environmental SciencesThe origins of gravel bearing sediments in the upper Holocene stratigraphy of the Brahmaputra-Jamuna River in northern Bangladesh are explored in this thesis through sediment geochemistry analyses and characterization of ...
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(2019-07-23)Department: Earth and Environmental SciencesThis dissertation explores the paleoecology of mammalian communities in North America at different spatial and temporal scales. Paleoecology uses the fossil record as a tool to develop and test models of species’ response ...
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(2012-12-04)Department: Earth and Environmental SciencesDietary studies of xenarthrans are challenging as geochemical or microscopic examinations utilize enamel, which xenarthrans lack. The relative softness of dentin makes it potentially more prone to taphonomic alteration; ...
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(2011-07-20)Department: Earth and Environmental SciencesThe brittlestar, Ophionotus victoriae, is the third most abundant epifaunal animal in Explorers Cove (EC; mouth of Taylor Valley). However its ossicles, composed of high-Mg calcite, rarely occur in either short cores of ...
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(2013-07-17)Department: Earth and Environmental SciencesDesert vegetation in the Southwestern United States influences sediment transport. Specifically, rainsplash processes create mounds beneath shrubs which regulate the sediment flux on hillslopes. In turn, complex plant ...
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(2017-07-27)Department: Earth and Environmental SciencesWe perform Ediacaran-style decay experiments on both sea anemones (Condylactis gigantea) and sea hares (Dolabella auricularia) in order to test between several proposed models of control on ‘death mask’ style preservation. ...
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(2007-07-24)Department: Earth and Environmental SciencesPyrite crystals were synthesized with no impurities and doped with As, Co, or Ni to be investigated along with natural samples, using electrochemical techniques, wet chemical kinetic experiments, and solid-state measurements ...
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(2008-12-06)Department: Earth and Environmental SciencesThis study investigates the effects of earthworm burrowing on arsenic mobility and speciation in soil. The use of roxarsone in the poultry industry as a feed supplement is an increasing anthropogenic source of arsenic. ...
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(2009-04-22)Department: Earth and Environmental SciencesThis study examines how coupled geomorphic and biologic processes influence the potential for hillslope soils to store organic carbon. A mass-balance model of soil organic carbon on hillslopes is developed by combining ...
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(2012-07-27)Department: Earth and Environmental SciencesThe mineral zircon (ZrSiO4) is a particularly robust geochronometer and arguably one of the most important minerals available to study the evolution of the Earth’s crust. Despite a high preservation potential, zircon grains ...
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(2019-07-23)Department: Earth and Environmental SciencesThe volcanic-plutonic connection remains one of the most significant conundrums facing igneous petrologists. We have developed a methodology and initial basis of observation to identify volcanic events using information ...
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(2013-12-16)Department: Earth and Environmental SciencesClimate change and sea level rise will continue to stress the human and natural landscapes over the next century with low-lying deltaic regions characterized by extensive aquifer systems being highly vulnerable to these ...