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Articles 1171 - 1200 of 1925

Full-Text Articles in Sedimentology

Postulated Evolution Of Platte River And Related Drainages, V. L. Souders, J. B. Swinehart, V. H. Dreeszen Sep 1990

Postulated Evolution Of Platte River And Related Drainages, V. L. Souders, J. B. Swinehart, V. H. Dreeszen

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Hydrology And Sedimentology Of Dynamic Rill Networks Volume I: Erosion Model For Dynamic Rill Networks, Daniel E. Storm, Billy J. Barfield, Lindell E. Ormsbee Aug 1990

Hydrology And Sedimentology Of Dynamic Rill Networks Volume I: Erosion Model For Dynamic Rill Networks, Daniel E. Storm, Billy J. Barfield, Lindell E. Ormsbee

KWRRI Research Reports

No abstract provided.


Eolian Sand Deposits In Maine, Joshua Katz Aug 1990

Eolian Sand Deposits In Maine, Joshua Katz

Maine Collection

Eolian Sand Deposits in Maine

by Joshua Katz - Timson, Schepps & Peters, Inc., Hallowell, Maine

Planning Report No.91, August 1990.

"A report prepared for the Maine Critical Areas Program, State Planning Office."

Contents: List of Figures / List of Maps and Tables / Acknowledgements / Introduction / Inland Eolian Sand Deposits / Research Methods / Rating Methods / Significant Criteria / Summary of Results / Significant Eolian Deposits in Maine / Site Descriptions / Recommendations / Glossary / References Cited


Hydrology And Sedimentology Of Dynamic Rill Networks Volume Ii: Hydrologic Model For Dynamic Rill Networks, Lindell E. Ormsbee, George E. Blandford, John S. Montgomery, Laura B. Terrell, Billy J. Barfield, Daniel E. Storm Aug 1990

Hydrology And Sedimentology Of Dynamic Rill Networks Volume Ii: Hydrologic Model For Dynamic Rill Networks, Lindell E. Ormsbee, George E. Blandford, John S. Montgomery, Laura B. Terrell, Billy J. Barfield, Daniel E. Storm

KWRRI Research Reports

A comprehensive model has been developed for use in modeling the hydrologic response of rill network systems. The model, which is called HYMODRIN, is composed of both a hydrologic runoff component and a hydraulic channel routing component. The hydrologic component of the model uses a Green Ampt infiltration approach linked with a nonlinear reservoir runoff model. The channel routing component of the model is baaed on a finite element solution of the diffusion wave equations. In order to account for backwater effects the model employs a dual level iteration scheme.

The model may be used in either a stand alone …


Effects Of Aromatic Concentration On Methane Fermentation, Yi-Tin Wang, Pin-Chieh Pai, H. David Gabbard Aug 1990

Effects Of Aromatic Concentration On Methane Fermentation, Yi-Tin Wang, Pin-Chieh Pai, H. David Gabbard

KWRRI Research Reports

The anaerobic biodegradability and toxicity of fourteen aromatic compounds were evaluated over a wide range of concentrations using a serum bottle technique. Benzene, toluene, and all three isomers of xylene were not significantly degraded to methane in a phenol-enriched culture. Complete degradation of 1000 mg/L phenol, 800 mg/L catechol, 100 mg/L 2-NP, 100 mg/L 3- NP, and 100 mg/L 4-NP was observed within two months while depletion of 100 mg/L resorcinol and 1000 mg/L hydroquinone required more than six and eight months incubation, respectively. None of the three isomers of chlorophenol were degraded in the phenol-enriched culture. Batch toxicity assay …


The Role Of Longshore Sediment Transport In The Loss Of Fill Material From An Estuarine Groin System, R. Neville Reynolds Jul 1990

The Role Of Longshore Sediment Transport In The Loss Of Fill Material From An Estuarine Groin System, R. Neville Reynolds

OES Theses and Dissertations

The influence of shoreline structures on longshore sediment transport and the evolution of a stable beach planform was investigated at Willoughby Spit, Virginia following the placement of 410,590 cubic meters of beach fill within a groin system. Shoreline changes and wave conditions in a single groin compartment, and the growth rate of a downdrift terminal spit were monitored during 1985 and 1986. Short term fluctuations in the shoreline position within the groin compartment suggested an episodic westerly movement of sediment through the groin system. Primary sediment moving events were associated with northerly winds which produced waves up to 50 cm …


Metal Mobilization From A Near-Shore Lake Sediment Under Simulated Acidic Groundwater Inputs, Raveendra V. Ika Jul 1990

Metal Mobilization From A Near-Shore Lake Sediment Under Simulated Acidic Groundwater Inputs, Raveendra V. Ika

OES Theses and Dissertations

Simulation of acidic groundwater passing through lake sediments was conducted under controlled conditions in a laboratory. Three sediment cores collected intact from the near-shore region of an acidic lake were subjected to simulated groundwater inputs of initially identical chemistry for a seven day period. Following this period water being used in the simulation for two of the sediment cores was acidified by hydrochloric acid (HC1) addition to examine the ability of these sediments to neutralize acidic groundwater with varying H+ concentration.

Simulated acidic water passing through the sediment cores mobilized significant amounts of metals. The sediment acted as a …


Geology And Economic Potential Of The Muddy Ranch Inlier, North-Central Oregon, Mustafa Kamal Jun 1990

Geology And Economic Potential Of The Muddy Ranch Inlier, North-Central Oregon, Mustafa Kamal

Loma Linda University Electronic Theses, Dissertations & Projects

There has been confusion for many years regarding the lithology and age of the rocks exposed in the Muddy Ranch Inlier in north-central Oregon. Taylor (1960) referred to these rocks as metasediments and informally named them the "Muddy Ranch phyllite". My studies indicate the inlier consists of weakly metamorphosed siltstone, mudstone, and less abundant sandstone.

Due to the absence of fossil evidence, it was not possible to determine the age of these rocks. However, from the stratigraphic setting and correlation with similar rocks exposed along structural trend to both the northeast and southwest, rocks of the Muddy Ranch Inlier may …


Bazile Triangle Groundwater Quality Study, David C. Gosselin Feb 1990

Bazile Triangle Groundwater Quality Study, David C. Gosselin

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


The Effect Of Industrial Development On The Sediment Contamination Of Apponaug Cove, A Historical Analysis, Marina Havan-Orumieh Jan 1990

The Effect Of Industrial Development On The Sediment Contamination Of Apponaug Cove, A Historical Analysis, Marina Havan-Orumieh

Marine Affairs Theses and Major Papers

Sediment cores have long been used to formulate the chronology of environmental contamination. This paper will investigate the utility of sediment cores in determining the chronology of trace metal contamination in Apponaug Cove, Rhode Island. A meter-long sediment core taken from the Cove was analyzed for chromium, copper, lead, zinc and nickel as well as organic pollutants coprostanol, polyaromatic hydrocarbons, benzotriazole and clorobenzotriazole. The core represents a close to 200 year record of sediments in Apponaug Cove. The cultural/economic changes in the Watershed in addition to environmental laws composed in the State and Federal levels which may have correlated with …


Geochemistry Of Selected Maine Peat Deposits, Stephen A. Norton Jan 1990

Geochemistry Of Selected Maine Peat Deposits, Stephen A. Norton

Maine Collection

Geochemistry of Selected Maine Peat Deposits

by Steven Allen Norton

Maine Geological Survey, Department of Conservation, Augusta, Maine, 1990.

Contents: Introduction / Purpose of Study / Location of Study Sites / Methods / Acknowledgements / Results / Water Chemistry / Dating of Short Cores / Chemistry of Short Cores / Core Interpretations / Summary / References Cited


Annual Installation Of Irrigation Wells In Nebraska Through 1989, Conservation Survey Division Jan 1990

Annual Installation Of Irrigation Wells In Nebraska Through 1989, Conservation Survey Division

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Richardson County Test Hole Logs, Raymond R. Burchett, Frank A. Smith Jan 1990

Richardson County Test Hole Logs, Raymond R. Burchett, Frank A. Smith

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Earthquakes In Nebraska, Second Edition (Expanded), R. R. Burchett Jan 1990

Earthquakes In Nebraska, Second Edition (Expanded), R. R. Burchett

Conservation and Survey Division: Faculty and Staff Publications

An earthquake is the result of an adjustment of the surface of the earth caused by a release of energy in the earth's crust. Faulting is one of many causes of earthquakes.


Mineral Facts For Nebraska, Raymond R. Burchett Jan 1990

Mineral Facts For Nebraska, Raymond R. Burchett

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Annual Departures From Average Annual Precipitation In Nebraska, 1850-1989, Conservation And Survey Division Jan 1990

Annual Departures From Average Annual Precipitation In Nebraska, 1850-1989, Conservation And Survey Division

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Location Of Registered Irrigation Wells In Nebraska As Of 1990. Jan 1990

Location Of Registered Irrigation Wells In Nebraska As Of 1990.

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Potash Deposits In Nebraska, R. R. Burchett Jan 1990

Potash Deposits In Nebraska, R. R. Burchett

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Volcanic Ash Deposits In Nebraska, R. R. Burchett Jan 1990

Volcanic Ash Deposits In Nebraska, R. R. Burchett

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Origin, Sedimentary Geochemistry, And Correlation Of Middle And Late Ordovician K-Bentonites: Constraints From Melt Inclusions And Zircon Morphology, Carsten Schirnick Jan 1990

Origin, Sedimentary Geochemistry, And Correlation Of Middle And Late Ordovician K-Bentonites: Constraints From Melt Inclusions And Zircon Morphology, Carsten Schirnick

Geology Theses and Dissertations

The present study of Paleozoic K-bentonites demonstrates that the geochemistry of melt inclusions and the morphology of zircons can be studied by inexpensive and simple-to-use methods, which rely on phenocrysts. Constraints are obtained that lead to (a) the origin of these altered volcanic ashes, (b) the geochemistry of ash-to-K-bentonite-alteration, and (c) the reliable correlation of extensively altered volcanic ashes (i.e. K-bentonites).
Silicic melt inclusions (i.e. non-devitrified) have been found in quartz and zircon phenocrysts contained within Ordovician and Devonian K-bentonites from New York State, the Upper Mississippi Valley, and Pennsylvania. Origin, source, and tectonic setting of the volcanism that produced …


The Fourth Of July Depends Upon Minerals, R. R. Burchett Jan 1990

The Fourth Of July Depends Upon Minerals, R. R. Burchett

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Annual Departures From Average Annual Precipitation In Nebraska, 1850-1989, Conservation Survey Division Jan 1990

Annual Departures From Average Annual Precipitation In Nebraska, 1850-1989, Conservation Survey Division

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Quartzite Deposits In Nebraska, R. R. Burchett Jan 1990

Quartzite Deposits In Nebraska, R. R. Burchett

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Salt Deposits In Nebraska, R. R. Burchett Jan 1990

Salt Deposits In Nebraska, R. R. Burchett

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Sandstone Deposits In Nebraska, R. R. Burchett Jan 1990

Sandstone Deposits In Nebraska, R. R. Burchett

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Topographic Maps, 7.5-Minute Series, R. R. Burchett Jan 1990

Topographic Maps, 7.5-Minute Series, R. R. Burchett

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Water Quality In The Lower Platte River Basin With Emphasis On Agrichemicals, R. R. Spalding Jan 1990

Water Quality In The Lower Platte River Basin With Emphasis On Agrichemicals, R. R. Spalding

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Nebraska Mineral Operations Review, 1989, Raymond R. Burchett, Duane A. Eversoll Jan 1990

Nebraska Mineral Operations Review, 1989, Raymond R. Burchett, Duane A. Eversoll

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Significant Rises And Declines In Nebraska Groundwater Levels (From Pre-Development As Of Fall 1989)/Registered Irrigation Wells In Nebraska (As Of January 1, 1990), Mark Burbach Jan 1990

Significant Rises And Declines In Nebraska Groundwater Levels (From Pre-Development As Of Fall 1989)/Registered Irrigation Wells In Nebraska (As Of January 1, 1990), Mark Burbach

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.


Drying Out Wet Basements, Mark S. Kuzila Jan 1990

Drying Out Wet Basements, Mark S. Kuzila

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.