Physical Sciences and Mathematics Commons^™

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.

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.

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

Conservation and Survey Division

No abstract provided.

Volcanic Ash Deposits In Nebraska, R. R. Burchett

Conservation and Survey Division

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

Conservation and Survey Division

No abstract provided.

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

Conservation and Survey Division

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.

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

Conservation and Survey Division

No abstract provided.

Nebraska Natural Resource District Boundaries

Conservation and Survey Division

No abstract provided.

Nebraska Map Of Counties, 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.

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

Conservation and Survey Division

No abstract provided.

Annual Report Of Nebraska-1990, Karl E. Starch, Raymond R. Burchett

Conservation and Survey Division

No abstract provided.

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

Conservation and Survey Division

No abstract provided.

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

Conservation and Survey Division

No abstract provided.

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 1989)/Registered Irrigation Wells In Nebraska (As Of January 1, 1990), Mark Burbach

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.

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 …

Relative Rise In Sea-Level During The Late Holocene At Six Salt Marshes In The Puget Basin, Washington, Harriet (Harriet Guthrie) Beale

WWU Graduate School Collection

Relative sea-level changes during the past several thousand years were determined at six marshes in three areas of the Puget Basin, Washington, to identify sites of vertical crustal movement, to provide data on regional relative sea-level history, and to collect data that may be used to monitor a proposed acceleration in the rate of eustatic sea-level rise due to global warming. Six salt marshes were cored to obtain radiocarbon ages of basal fossil peat deposits. Uncertainty in relating fossil marsh plants to elevations of former sea-levels reflects both the vertical range in which the plants occur today at the six …

Petrology And Structure Of The Lookout Mountain - Little Devil Peak Area, North Cascades, Washington, Jeffrey A. Cary

WWU Graduate School Collection

The focus of this study is on the protolith types, metamorphism and deformation of the Cascade River Schist and related rocks in the Lookout Mountain - Little Devil Peak area of the North Cascades, Washington.

Two distinctive protolith assemblages are recognized in the Cascade River Schist, a volcanic arc assemblage in the Lookout Mountain area and an oceanic/forearc assemblage in the Little Devil Peak area. The volcanic arc sequence consists from the bottom up of andesitic to rhyolitic tuffs and flows, coarse-grained volcaniclastics and fine grained pelites. The lower tuff/flow unit grades downward into and is transitional with the underlying …

A New Determination Of Pacific-Kula Relative Motions, Harold J. (Harold John) Cashman

WWU Graduate School Collection

A new method is presented and used to determine estimates of instantaneous relative motion vectors for the Pacific plate relative to the Farallon and Kula plates between magnetic chrons 34 and 24 (84 to 56 Ma). A weighted chi-square minimization technique was employed that has as input sequential magnetic anomaly picks taken from original ship-track profiles, and fracture-zone azimuths estimated from bathymetric control and offsets in magnetic lineations. Assignment of errors to the input data allows the use of critical chi-square limits to obtain confidence intervals on pole locations and their angular rates. Eleven distinctive magnetic anomalies chosen as control …

Tidal-Flushing Characteristics Of The Proposed Lummi Bay Marina, Whatcom County, Washington, William Morse Watts

WWU Graduate School Collection

Tidal-flushing of the proposed Lummi Bay Marina was studied using a physical model. The model was distinct from those of other regional marinas in that it included a berm around the edges, depth contours,sloping walls, and simulated mixed-semidiurnal tides. Spectrophotometric measurements of absorbance of dye in water resulted in the calculation of exchange-coefficients and flushing efficiency. Exchange coefficients in the physical model increased with increasing tidal range, suggesting a tendency for decreased water quality during smaller tides. Exchange was best in spring-tide simulations, but water tended to stagnate during the smaller ebb and flood cycles in both spring and neap …

The 48-Year Sediment Budget (1942-1989) For Deer Creek Basin, Washington, Jerry (Jerry Arthur) Eide

WWU Graduate School Collection

A sediment budget for the Deer Creek basin (137 km²), northwest Washington, spans both pre- and post-management periods, and documents a significant increase in sediment production between 1942 and 1989. Sediment production was divided into four primary components: landslides, streambank erosion, hillslope erosion, and road-related erosion. Using field sampling of the four components, the amount of field time necessary to quantitatively describe the relative importance of the budget components is minimized. Five incremental sets of aerial photographs were used to construct a management history for the basin, to document time of initiation of landslides, and to document changes …

The Similkameen Batholith Of North-Central Washington And South-Central British Columbia: The Petrotectonic Significance Of An Alkaline/Calc-Alkaline Magmatic Complex, Andrew M. (Andrew Mcnair) Buddington

WWU Graduate School Collection

The Similkameen batholith is a 170 Ma plutonic complex that contains coeval mafic alkaline and granitic calc-alkaline assemblages. The marginal mafic alkaline suite is silica-undersaturated, characteristically potassic in composition and comprised of malignite, shonkinite, and mafic syenites (+/- nepheline) with biotite and amphibole-bearing pyroxenite cumulates. The granitic plutons of the core are calc-alkaline, I-type, ranging from monzonite to granodiorite to granite in composition.

Structural and petrofabric studies indicate that the mafic alkaline suite was intuded and deformed by the calc-alkaline granitoids. Magmatic fabrics within the mafic rocks are concentric to the lithologic zonations and have been overprinted by sub-magmatic flow …