Earth Sciences Commons^™

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

Conservation and Survey Division

No abstract provided.

Significant Rises And Declines In Nebraska Groundwater Levels (From Pre-Development As Of Fall 1988) /Registered Irrigation Wells In Nebraska (As Of January 1, 1989), Conservation Survey Division

Conservation and Survey Division

No abstract provided.

Location Of Registered Irrigation Wells In Nebraska As Of 1990.

Conservation and Survey Division

No abstract provided.

Mineral Facts For Nebraska, Raymond R. Burchett

Conservation and Survey Division

No abstract provided.

Seepage Interceptor Drains For Reducing Waterlogging And Salinity, Don Mcfarlane, Jim Cox

Journal of the Department of Agriculture, Western Australia, Series 4

Shallow interceptor drains can reduce waterlogging on sloping sites. Such drains will more than pay for themselves from the increased crop yield. Recent work has shown that these drains also decrease salinity so that they are cost-effective in the long as well as the short term.

Cross-Shore And Longshore Sediment Size Distribution On Southern Currituck Spit, North Carolina, Lauro Julio Calliari

Dissertations, Theses, and Masters Projects

Using Q-mode factor analysis, 87 surficial sediment samples collected from Duck and Whalehead beach, North Carolina, were analyzed using the weight percent of the gravel and sand fraction subdivided at 0.5 phi class interval as variables. An additional data set composed of 178 surficial sediment samples from Duck beach (bimodal) and Coquina beach (unimodal fine) representing three years of sampling at monthly intervals were analyzed by the same technique using only the sand fraction. The spatial and temporal patterns of sediment factor groups support three main inferences. (1) Bimodal beaches display a more distinct sediment zonation than unimodal beaches. (2) …

Quaternary Geology Of The Chesapeake Bay, Jeffrey P. Halka, Steven M. Colman, Carl H. Hobbs Iii

VIMS Books and Book Chapters

The Chesapeake Bay, which is a classic coastal plain estuary, is located on a trailing edge continental margin. It has a surface area of nearly 6,000 km2 and ranges in width from 8 to 48 km. The morphology of the bay clearly reflects its formation as a response to fluctuating sea level during and following the last major continental glaciation. The shoreline is highly irregular, the tributaries form an intricate dendritic drainage pattern, and a deep axial channel occurs along much of its length (fig. 1). Water depths commonly exceed 30m in this deep channel, which is flanked by broad …

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

Conservation and Survey Division

No abstract provided.

Postfolding Remagnetization That Passes The Fold Test, Russ R. Burmester, Myrl E. Beck Jr., D. R. Bazard

Geology Faculty Publications

The palaeomagnetism of folded Cretaceous redbeds in the Methow-Pasayten belt of Washington was studied in an attempt to resolve the tilt versus translation origin of shallow inclinations found in most Cretaceous plutonic rocks of the Pacific Northwest. After elimination of results from apparently strained, overturned beds, correction to palaeohorizontal of the high-temperature, dominant components produced two distinct directions, one from each of two areas. Treated separately, the magnetizations from these two areas appear to pass the fold test. Both directions are anomalously shallow which is typical of the region, but the discrepancy between them casts doubt that both could have …

Analysis And Numerical Simulation Of The Ground Water System At The Bonneville Navigation Lock Site, Oregon, Dirk Baron

Dissertations and Theses

As part of the new navigation lock for Bonneville Dam a new water source for the Bonneville Fish Hatchery must be supplied. The hatchery is located on the Oregon side of the Columbia River downstream of the dam. It requires large quantities of water free from chemical and biological contamination. In addition, the water has to be in a narrow temperature range. Currently the fish hatchery receives its water from a well field that is located on the alluvial terrace downstream of Bonneville Dam. The well field lies in the proposed approach channel for the new lock and has to …

Subsurface And Geochemical Stratigraphy Of Northwestern Oregon, Olga Berenice Lira

Dissertations and Theses

Lithological, geophysical, paleontological and geochemical methods were used in order to define the contact relationship between the Keasey and the Cowlitz formations in northwestern Oregon. Drill cuttings from six wells located in Columbia County were analyzed by the Instrumental Neutron Activation Analysis (INAA) method. The concentrations of K, Th, Rb and Sc/Co ratio in the samples established four different groups: 1) High K, Rb, and TH, with low Sc/Co ratio typical of Cowlitz sediments. 2) Low K, Th and Rb and high Sc/Co ratio, more characteristics of the Keasey Formation. 3) Very low concentrations of Rb and high Sc, which …

Biological Markers In Lower Jurassic Synrift Lacustrine Black Shales, Hartford Basin, Connecticut, U.S.A., Michael A. Kruge, John F. Hubert, Jay F. Akes, Paul E. Meriney

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

The East Berlin Formation (Lower Jurassic, Hartford basin, Connecticut, U.S.A.) is distinctive for its six cyclic units of lacustrine black shale and gray mudstone. separated by playa and fluvial redbeds. The black shales arc each about a meter thick and were deposited in subtropical, thermally stratified, oligomictic lakes, the youngest of which (lakes 3 through 6) were large enough to flood most of the basin and attained depths of several tens of meters.

The saturate fractions of solvent extracts of organic-rich black shales from each of the six lakes, collected at fresh roadcuts near East Berlin, arc dominated by extended …

Organic Geochemistry Of A Lower Jurassic Synrift Lacustrine Sequence, Hartford Basin, Connecticut, U.S.A., Michael A. Kruge, John F. Hubert, David F. Bensley, John C. Crelling, R Jay Akes, Paul E. Meriney

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

Synrift terrestrial strata of the Lower Jurassic East Berlin Formation (Hartford basin, Connecticut, U.S.A.) record cyclical expansion and contraction of major lakes, six of which were deep enough to develop anoxic bottom waters. We have studied one representative lacustrine sequence in detail, sampling a new roadcut near the village of East Berlin. The section examined is 4 m thick, with a gray siltstone at the base, deposited in shallow water, overlain by an organic-rich black shale (deep water), succeeded in turn by another gray siltstone, deposited as the lake waters gradually receded. The upper gray siltstone is chemically distinct from …

Gravity Maps, Models And Analysis Of The Greater Portland Area, Oregon, Paul Thomas Beeson

Dissertations and Theses

Growing concern over earthquakes in the Pacific Northwest has prompted the mapping and location of near surface faults in the Portland area, Oregon. Visible evidence of faults is poor, requiring the use of geophysical methods to assist in mapping and defining structures in the basin. Gravity maps and models may help in addressing this problem.

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

No abstract provided.

35th Annual Midwest Groundwater Conference Program With Abstracts, P. B. Wigley, K. E. Stork, D. C. Gosselin

Conservation and Survey Division

No abstract provided.

Groundwater Levels In Nebraska, 1989, Michael J. Ellis, Gregory V. Steele, Perry B. Wigley

Conservation and Survey Division

No abstract provided.

Resource Notes-Academic Year 1989-90

Conservation and Survey Division

No abstract provided.

Nebraska Map Of Counties, Conservation Survey Division

Conservation and Survey Division

No abstract provided.

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

Conservation and Survey Division

No abstract provided.

Diatomaceous Earth Deposits In Nebraska, R. R. Burchett

Conservation and Survey Division

No abstract provided.

Gypsum Deposits In Nebraska, R. R. Burchett

Conservation and Survey Division

No abstract provided.

Limestone Deposits In Nebraska, R. R. Burchett

Conservation and Survey Division

No abstract provided.

The Permian System In Nebraska, R. R. Burchett

Conservation and Survey Division

No abstract provided.

Potash Deposits In Nebraska, R. R. Burchett

Conservation and Survey Division

No abstract provided.

Quartzite Deposits In Nebraska, R. R. Burchett

Conservation and Survey Division

No abstract provided.

Salt Deposits In Nebraska, R. R. Burchett

Conservation and Survey Division

No abstract provided.

Sand And Gravel Deposits In Nebraska, R. R. Burchett

Conservation and Survey Division

No abstract provided.

Sandstone Deposits In Nebraska, R. R. Burchett

Conservation and Survey Division

No abstract provided.

Topographic Maps, 1 X 2 Degree Series, R. R. Burchett

Conservation and Survey Division

No abstract provided.