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- Heavy metals -- Environmental aspects -- Chesapeake Bay (Md. and Va.); Estuarine sediments -- Chesapeake Bay (Md. and Va.); Suspended sediments -- Chesapeake Bay (Md. and Va.); Sediments (Geology); Coastal sediments; Estuarine oceanography (1)
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Articles 1 - 12 of 12
Full-Text Articles in Physical Sciences and Mathematics
Nebraska Groundwater Level (Decline & Rise) And Location Of Registered Wells, 1983
Nebraska Groundwater Level (Decline & Rise) And Location Of Registered Wells, 1983
Conservation and Survey Division
No abstract provided.
Important Geological Features And Localities Of Maine, Maine Geological Survey
Important Geological Features And Localities Of Maine, Maine Geological Survey
Maine Collection
Important Geological Features and Localities of Maine
Executive Department, Maine Geological Survey : Maine State Planning Office
(December, 1982).
Contents: Introduction / Purpose of this Study / The Geology of Maine / Important Publications / Catalogue of the Critical Geologic Features of Maine / Recommendations for Further Research / Publications / Conclusions / Acknowledgements / References Cited / Critical Areas Program List of Geological Planning Reports
Gully, Scour Hole, And Pothole Development At The Base Of The Gering Formation (Miocene?), Southeastern Banner County, Nebraska, Robert F. Diffendal Jr.
Gully, Scour Hole, And Pothole Development At The Base Of The Gering Formation (Miocene?), Southeastern Banner County, Nebraska, Robert F. Diffendal Jr.
Robert F. Diffendal, Jr., Publications
Several sediment-filled paleovalleys belonging to the Arikaree Group of Miocene (?) age occur in southeastern Banner County, Nebraska. One gully and a main paleovalley exhibit, respectively, erosional features like those in modern gullies in the area and like those on the bedrock floors of modern straight streams carrying an appreciable sediment load. Scour holes and a pothole on the valley floor of the main paleovalley are similar to those produced experimentally on the bed of a straight stream.
Nebraska's Platte River: A Graphic Analysis Of Flows, Ray Bentall
Nebraska's Platte River: A Graphic Analysis Of Flows, Ray Bentall
Conservation and Survey Division
WSP-53
Groundwater Levels In Nebraska, 1981, Martin S. Johnson, Darryll T. Pederson
Groundwater Levels In Nebraska, 1981, Martin S. Johnson, Darryll T. Pederson
Conservation and Survey Division
No abstract provided.
Metal Inventory And Fate Of Suspended Sediment In Chesapeake Bay, Maynard M. Nichols, Galen Thompson, Bruce Nelson
Metal Inventory And Fate Of Suspended Sediment In Chesapeake Bay, Maynard M. Nichols, Galen Thompson, Bruce Nelson
Reports
This report aims to provide new information that meets selected objectives of the EPA-States Taxies Plan of Action: i.e. (1) to determine the state of the Bay with respect to the distribution and concentration of selected metals in suspended material and fluid mud; (2) to establish the temooral variations of sediment and metal loading: (3) to identify potential zones of metal accumulation and trace their transport routes, and (4) to provide recommendations for monitoring contaminated sediment.
Field observations provide longitudinal coverage of the Bay with transects into Baltimore Harbor and Hampton Roads. They include contrasting conditions of seasonal high-low river …
Geometries And General Features Of Some Cenozoic Valleys And Valley Fills, Western Nebraska, Robert F. Diffendal Jr.
Geometries And General Features Of Some Cenozoic Valleys And Valley Fills, Western Nebraska, Robert F. Diffendal Jr.
School of Natural Resources: Faculty Publications
Portions of Tertiary and Quaternary valleys and valley fills have been exhumed by recent stream erosion at many sites in western Nebraska. Paleovalleys vary from narrow, steep-sided, high gradient tributary gullies less than 0.1 km wide to broad, flat-floored valleys produced by lateral erosion. Segments of valley floors may be nearly smooth in the case of a Quaternary example, or may be very irregular with potholes and other deep scour features. Paleovalley sides, when exposed, are often steeply sloping, and approaching or possibly going beyond the vertical where the valleys have been eroded into the Brule Formation. Paleovalleys range in …
Geochemical And Glacio-Geomorphic Implications Of Basalt Weathering In The Queen Maud Mountains, Antarctica, R. W. Talkington, Paul Andrew Mayewski, H. E. Gaudette
Geochemical And Glacio-Geomorphic Implications Of Basalt Weathering In The Queen Maud Mountains, Antarctica, R. W. Talkington, Paul Andrew Mayewski, H. E. Gaudette
Earth Science Faculty Scholarship
Summary. The weathering of a suite of basalt clasts. that have been transported by mass wasting downslope in the Cumulus Hills region of the Queen Maud Mountains. Antarctica. is examined from both geochemical and glacio-geomorphic viewpoints. Chemical weathering. predominantly oxidation and hydration. increases in severity from clast core to rim for the suite. These weathering processes and concomitant formation of a weathering rind are suggested to be an accumulative process. culminating in the disaggregation of the rock due in part both to the chemical breakdown of the interstitial and intersertal basaltic glass and to physical weathering processes. Mass wasting rates …
Regional Implications Of The Geology Of The Ogallala Group (Upper Tertiary) Of Southwestern Morrill County, Nebraska, And Adjacent Areas, Robert F. Diffendal Jr.
Regional Implications Of The Geology Of The Ogallala Group (Upper Tertiary) Of Southwestern Morrill County, Nebraska, And Adjacent Areas, Robert F. Diffendal Jr.
Robert F. Diffendal, Jr., Publications
A part of a filled Ogallala Group (upper Tertiary) paleovalley system exhumed by recent stream erosion in southwestern Morrill County, Nebraska, and adjacent areas contains steep gradient gullies filled with locally derived sediments. Younger channels filled with granitic gravels derived by stream erosion of the Rocky Mountains to the west and southwest cut across and through these older filled gullies, indicating that there were at least two periods of downcutting followed by periods of filling during the development of this system.
Individual clasts from younger Ogallala gravels are often as large as or larger than clasts from Quaternary gravels transported …
Nebraska Mineral Operations Review, 1982, Raymond R. Burchett, Duane A. Eversoll
Nebraska Mineral Operations Review, 1982, Raymond R. Burchett, Duane A. Eversoll
Conservation and Survey Division
No abstract provided.
An Investigation Of Sand Transport Phenomena In The Rappahannock River Estuary, Virginia, Charles Joseph Natale
An Investigation Of Sand Transport Phenomena In The Rappahannock River Estuary, Virginia, Charles Joseph Natale
Dissertations, Theses, and Masters Projects
Quantitative evidence supplied by bottom sediment textural analysis, Fourier grain-shape analysis and Q-mode factor analysis indicate that river-borne sand-sized sediment originating in the upper reaches of the Rappahannock is actively transported downstream and ultimately delivered to the estuarine sediment regime. Current velocity observations in the upper estuary as well as suspended sediment concentrations measured at stream gaging stations, indicate that short-term extreme hydrological events such as periodic river flooding provide a plausible transport mechanism to move river-borne sands into the estuarine sediment regime.Events of this nature can disrupt average partly-mixed estuarine circulation patterns by displacing the salt-wedge to a more …
Nebraska Groundwater Level (Decline & Rise) And Location Of Registered Wells, 1982
Nebraska Groundwater Level (Decline & Rise) And Location Of Registered Wells, 1982
Conservation and Survey Division
No abstract provided.