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Now showing items 187-206 of 438
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(2015-05-01)The mechanism by which plagiogranite bodies form within the ocean crust remains enigmatic. Plagiogranites are anomalously high in their silica content relative to basalt, and their petrogenesis has been primarily attributed ...
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(1994)This investigation focuses on the chemistry of dolomitization and the geochemical and petrographic characteristics of the Middle Ordovician limestones and dolostones in the Illinois basin.
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Melanges and Glaucophanic Schists of the Mona Complex (Precambrian), Southeast Anglesey, North Wales (1983)The Mona Complex of Anglesey, North Wales can be modeled as a fragmented arc and upper subduction complex assemblage. In southeastern Anglesey, the two rock suites are juxtaposed, and possible relationships between these ...
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(2015-01-21)Mercury (Hg) is a redox active global contaminant. Hg has two stable oxidation states in the environment, Hg(0) and Hg(II). Hg(0) is significantly less soluble than Hg(II) and is less reactive. Hg(II) is very soluble and ...
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(1986)Early Proterozoic amphibolite dykes of the Scourie Dyke swarm, exposed in the transitional Archean to Proterozoic Lewisian basement near Scourie, Northwest Scotland, exhibit complex morphologies, mineralogies, and microfabrics. ...
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(2008)I consider the nature and origin of the chemical and microbiological zonation of the Cretaceous Middendorf aquifer, in the Coastal Plain of South Carolina, in light of the chemical evolution of groundwater along a flow ...
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(2005)The extent of phenotypic plasticity in the corallite morphology of colonies of M. annularis s.s. was determined by analyzing the three-dimensional morphology of calical surfaces and the two-dimensional corallite morphology ...
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(2012-02-01)The Mahomet aquifer, a pristine water resource spanning much of central Illinois, is home to a diverse ecosystem of bacteria and archaea. We examined this microbial community at 18 wells across the aquifer by filtering ...
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(2015-04-28)A systematic evaluation has been undertaken of the mechanisms and products of microbial community preservation within modern-to-ancient terrestrial hot-spring calcium carbonate (CaCO3) limestone deposits called travertine. ...
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(1984)A total of 2,795 thin sections were studied, representing the carbonate section of 18 wells drilled in the Foz do Amazonas Basin, offshore northeast Brazil. The Amapa Formation (Paleocene-Middle Miocene) consists of a ...
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(2013-08-22)The Midcontinent region of the United States is part of the cratonic platform of the North American craton. This region is underlain by Precambrian basement formed dominantly during Proterozoic accretionary orogenies. ...
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Now showing items 187-206 of 438