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Showing 1 to 20 of 301 for “"Lithology"”.
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Lithology of the sea-floor off Southern California
Made available in DSpace on 2017-11-30T21:01:07Z (GMT). No. of bitstreams: 2 6429348.pdf: 7757499 bytes, checksum: dc373a614d38b34eb7a56bb0eca007fe (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1941
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Characterization of Sentinel Butte Petrified Wood and Host Lithology Associations
<p>Large quantities of petrified wood occur in the Paleocene Sentinel Butte Formation in western North Dakota. An examination of this petrified wood has provided information about modes and degrees of fossilization, silica phases present, organic structure preservation, and parent tree type. In the …
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Investigating the Effects of Lithology on Landscape Evolution Processes across Scales
… have long observed the influence of lithology on landscape form and evolution. However, the specific mechanisms by which this is accomplished are not well characterized. Here, I investigate the role of lithology in landscape evolution processes across spatial and temporal scales and …
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Lithology constraints from seismic waveforms : application to opal-A to opal-CT transition
In this work, we present a new method for seismic waveform characterization, which is aimed at extracting detailed litho-stratigraphical information from seismic data. We attempt to estimate the lithological attributes from seismic data according to our parametric representation of stratigraphical …
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Lithology and alteration assemblages of the Boss iron-copper deposit, Iron and Dent Counties, Southeast Missouri
… deposits.</p> <p>Rhyolites are the earliest lithology, and they are associated with a proposed collapsed caldera complex. Trachytes represent a shallow intrusive that post-dates the rhyolites. Both lithologies exhibit potassium enrichments and secondary quartz emplacement related to a …
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Characterizing long-term groundwater conditions and lithology for the design of large-scale borehole heat exchangers
<p>"Construction of large scale ground coupled heat pump (GCHP) systems that operate with hundreds or even thousands of boreholes for the borehole heat exchangers (BHE) has increased in recent years with many coming on line in the past 10 years. Many large institutions are constructing these …
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Pore pressure, and the interdependency between lithology, porosity, and acoustic log response targeting the Vaca Muerta Formation
… equations are modified to include porosity and lithology effects on velocity. To do so, logs from well within the LJE block in the Neuquén Basin are depth shifted to a reference well. Depth shifting shows a remarkable lack of variation in log signatures between wells, regardless of tool vintage, …
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Interactions Between Land Use and Local Lithology on Phosphorus Distribution in Northrup Creek Sediments, Monroe County, New York
… Past research has shown that land use and lithology are major contributors of phosphorus in a creek. High levels of organic phosphorus occur in agricultural areas of a watershed, and high levels of inorganic phosphorus occur in residential areas, especially near waste water treatment …
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Effects of Lithology, Structure and Stratigraphy on Surface Water Specific Electrical Conductance; South Fork of the Flathead River, Montana
… of electrical conductivity appear to be lithology and structure (faults). Limestone and dolomite produce high electrical conductivities (150 to 300 mS•cm-1), shale medium conductivities (70-150 mS•cm-1) and quartz, siltite, argillite low conductivities (0 to 70 mS•cm-1). Conductivity …
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Effects of Lithology, Structure and Stratigraphy on Surface Water Specific Electrical Conductance; South Fork of the Flathead River, Montana
… of electrical conductivity appear to be lithology and structure (faults). Limestone and dolomite produce high electrical conductivities (150 to 300 mS•cm-1), shale medium conductivities (70-150 mS•cm-1) and quartz, siltite, argillite low conductivities (0 to 70 mS•cm-1). Conductivity …
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An Examination of the Mineralogy and Lithology of the Bakken Shale with Implications upon the Bakken Petroleum System, Southeastern Saskatchewan
… lack of knowledge concerning the mineralogy and lithology of the Bakken shales, which may impact the source effectiveness and heterogeneity of the Upper and Lower Bakken shales. This research investigates the mineralogy and lithology of the Bakken shales in southeastern Saskatchewan based on …
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The Lithology of Herman and Campbell Beach of Glacial Lake Agassiz in the Area of Larimore and Arvilla, North Dakota
<p>The lithology of Herman and Campbell beaches of Glacial Lake Agassiz was studied in this report. It was found that the beaches are similar in that the material is 30 to 50 percent by weight over 4 mm. in diameter in both beaches. No shale is present in the sand of Campbell, although there is …
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Using rock physics to determine uncertainties in pore-fluid and lithology-estimates from seismic attributes in the Bredasdorp Basin, offshore South Africa
This study is aimed at developing a workflow for quantitative seismic interpretation. The workflow generated probability maps of various facies and pore-fluid by combining seismic attributes and wireline log data through rock physics relationships and supervised statistical classification. The …
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Patterns of Lithology, Structure, Alteration, Trace Elements, Carbonate Mineralogy, and Stable Isotopes around High-Grade Carlin-type Gold Deposits: Turquoise Ridge Deposit, Getchell District, Nevada
… exploration tools such as patterns of lithology, structure, visible hydrothermal alteration, trace elements, and clay mineralogy are presented in Chapter 1 to test for the presence of haloes that can potentially be used as vectoring tools in honing in on high-grade ore zones at the …
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The Effect of Structure and Lithology on Aspect Ratio of Fluvial Channels: A Field-Based Quantitative Study of the New River in Three Geologic Provinces
… function of other variables, such as structure, lithology, slope, large scale valley topography, and rock uplift, has not been fully quantified. The New River is ideal for examining these relationships because it shows considerable variability in width and aspect ratio and flows through three …
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Upscaling Lithology and Porosity Types from Microscopic to Core Domain with Thin Section Petrography, Dual Energy CT, and Rock Types: Creation of Diagenesis and Porosity Type Logs
Upscaling Lithology and Porosity Types from the Microscope to the Core with Thin Section Petrography, Dual Energy CT, and Rock Types: Creation of Diagenesis and Porosity Type Logs Authors: Jacob M. Proctor, André W. Droxler, Naum Derzhi, Heath H. Hopson, Paul (Mitch) Harris, Pankaj Khanna, and …
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Using Strontium Isotopes in Conjunction with Major, and Trace Elements to Identify Water/Rock Interaction in the Upper Kittitas County, Washington
… lithologic units. Rock leachates from different lithology were compared to water samples to determine a general 87Sr/86Sr signature of the water-rock interaction for that lithology. The signatures identified were systematically lower than their associated waters, but similar enough to identify …
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A Selected Study: Forest River Exposure, Inkser, North Dakota
… sand; 44.53% silt; and 17.31% clay. Coarse sand lithology averages are: shale 41.9%, crystalline 36.1%, dolomite 19.3%, and unknown 2.7%. </p><p>The overlying sand unit is 6.4m (21 ft) thick and has 18 distinct layers. It contains six reverse faults ranging from 1.04m to 1.83m in length. Texture …
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Local variability in early Oligocene paleosols as a result of ancient soil catenary processes, Brule Formation, Toadstool Park, Nebraska
… by changes in climate, ecology, topography, and lithology over time. These changes cause small-scale variations in the morphology and apparent development of paleosols and influence the degree to which certain soil features are preserved in the rock record. When drawing inferences about …
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A Gis Investigation of Regional Geologic Controls on Mercury Deposits in the Southwest Region of Arkansas
… deposits and regional faults or changes in lithology, both of which have been suggested (Clardy and Bush, 1976) to explain the narrow band of permissive host rock for the deposits. GIS was used to determine which mode of deposition (structural features or lithologic changes) better explains …
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