Physical Sciences and Mathematics Commons^™

Monthly Planet, 1987, December, Erin Wright, Huxley College Of The Environment, Western Washington University

The Planet

No abstract provided.

Monthly Planet, 1987, Novemeber, Erin Wright, Huxley College Of The Environment, Western Washington University

The Planet

No abstract provided.

Monthly Planet, 1987, June, Amy Morrison, Huxley College Of The Environment, Western Washington University

The Planet

No abstract provided.

Monthly Planet, 1987, May, Amy Morrison, Huxley College Of The Environment, Western Washington University

The Planet

No abstract provided.

Monthly Planet, 1987, March, Amy Morrison, Huxley College Of The Environment, Western Washington University

The Planet

No abstract provided.

Monthly Planet, 1987, February, Amy Morrison, Huxley College Of The Environment, Western Washington University

The Planet

No abstract provided.

Late Paleozoic Sea Levels And Depositional Sequences, Charles A. Ross, June R. P. Ross

Geology Faculty Publications

Cyclic sea level charts for the Lower Carboniferous (Mississippian), Middle and Upper Carboniferous (Pennsylvanian), and Permian show considerable variability in the duration and magnitude of third-order depositional sequences, and also in the position of general sea level as represented by second-order sea level. Transgressive and highstand system tracts are numerous on the cratonic shelves of the late Paleozoic continents. Shelf margin wedges are less well represented except at times of general lower sea levels. Most low stand wedges and all low stand fan systems are structurally deformed and make up many of the accretionary wedges and displaced terranes that lie …

Petrology And Tectonic Evolution Of The Bowers Supergroup Northern Victoria Land, Antarctica, Ray (Ray Joseph) Robert Jr.

WWU Graduate School Collection

The Bowers Supergroup of northern Victoria Land, Antarctica is at least 6.5 km thick and consists of Solidarity, Molar, and Glasgow Formations of the Middle Cambrian Sledgers Group; Middle to late Cambrian Mariner Group; and Middle Ordovician Leap Year Group. The Solidarity Formation is at least 0.4 km thick and consists of submarine tholeiites. The Molar Formation is up to 2.7 km thick and consists of slope-facies turbidites in its southwesternmost extent and shelf-facies sediments in its northeasternmost extent. Sediment provenance was the Glasgow Formation and a continental landmass lying northeast of the southwestern sloping Bowers basin. The Glasgow Formation …

Paleomagnetism Of The Late Cretaceous Ventura Member Of The Midnight Peak Formation, Methow-Pasayten Belt, North-Central Washington, David R. (David Richard) Bazard

WWU Graduate School Collection

Paleomagnetic analysis was conducted on 31 sites of the Ventura redbed Member of the Midnight Peak Formation located in the Methow-Pasayten belt, north-central Washington. Single high-stability components of magnetization, chiefly retained by high-unblocking temperature hematite exist in specimens from all but two of the sites. Directions calculated from these components were found to form circular within-site distributions and to be consistent across several meters of section. The single high-stability components, positive inclinations, and pre-folding, thus pre-Paleocene magnetizations suggest that the Ventura Member records a single Late Cretaceous dipole-field.

Proportionally untilting site-mean directions did not produce a reasonable field direction nor …

Quantification Of Net Shore-Drift Rates In Puget Sound And The Strait Of Juan De Fuca, Washington, R. Scott Wallace

WWU Graduate School Collection

Quantitative analysis of net shore-drift has been carried out at twenty-six sites in Puget Sound and the Strait of Juan de Fuca, Washington, U.S.A. Three methods were used to obtain net shore-drift rates: (1) field measurement of sediment accumulation at drift obstructions; (2) extrapolation of spit growth using aerial photographs and historical maps; and (3) evaluation of maintenance-dredging volumes at navigation channels.

The study area was divided into four regions based on physiography, and the effect of wind patterns on the area. The largest volumes of sediment were transported in the west-central region, along the southern coast of the Strait …

A Gravity Survey And Analysis Of The Mount Stuart Block Of Washington State, Gregg M. Petrie

WWU Graduate School Collection

Gravity data were gathered in the vicinity of the Mt. Stuart Block, a horst of pre-Tertiary rocks which include the Chiwaukum Schist, the composite Mt. Stuart Batholith, and the Ingalls Complex with its related metasedimentary-volcanic sequence, located in the east central Cascade Mountains of Washington. The final complete Bouguer map suggests the following features: (1) displacement of the Chiwaukum Graben occurs mostly on the west side in a narrow, 4-5 km, block 5.5 to 7.5 km deep, expanding in width to the north; (2) the Ingalls Complex is a relatively shallow feature: certainly a model hypothesizing a deep plug of …

The Petrography And Tectonic Significance Of The Blue Mountain Unit, Olympic Peninsula, Washington, Jon M. Einarsen

WWU Graduate School Collection

The sedimentary rocks of the early to middle Eocene Blue Mountain unit compose the stratigraphic base of the otherwise predominantly basaltic Crescent Formation in the Olympic Peninsula, Washington. In the study area, primarily in northeastern portions of the Olympic Peninsula, the Blue Mountain unit consists of two distinct petrofacies, one a plagioclase-rich feldspathic arenite, the other a chert-rich lithic arenite. A third petrofacies is a feldspathic-lithic arenite and is a petrologic combination of the two distinct petrofacies. The source areas for the plagioclase-rich and chert-rich petrofacies are interpreted to be the Coast Plutonic Complex and San Juan Islands, respectively. The …

Depositional Environment, Provenance, And Tectonic Setting Of The Upper Oligocene Sooke Formation, Vancouver Island, B. C., Susan Elaine Bream

WWU Graduate School Collection

The Upper Oligocene Sooke Formation, the uppermost unit of the Carmanah Group, is exposed along the southeastern coast of Vancouver Island, British Columbia, where it is part of the Crescent terrane. The Sooke Formation is generally less than 45 meters thick.

Typically, a basal boulder breccia is overlain by interdigitated layers of cross-stratified, often fossiliferous sandstone and conglomerate. Deposition of the Sooke Formation occurred along a steep coast with abundant cliffs, narrow boulder beaches and sandy beaches, and a nearby fluvial source. The conglomerates and breccias were deposited by debris flows, rock falls, and as storm lag deposits. Sandstones were …

Biostratigraphic Zonation Of Late Paleozoic Depositional Sequences, Charles A. Ross, June R. P. Ross

Geology Faculty Publications

Correlation of more than seventy third-order depositional sequences in Carboniferous and Permian strata uses assemblage zones of warm water benthic and nektonic shelf faunas. These include calcareous foraminifers, bryozoans, conodonts, and ammonoids and represent tropical, subtropical, and warm temperate water faunas from carbonate shelves and adjacent cratonic basins.

After the Early Carboniferous faunal zonation was highly provincial and worldwide correlations of depositional sequences are based on interpretations of evolutionary lineages and depositional patterns in each province and in identifying times of limited dispersals between provinces.

Associated with these faunal zones there were times of expanded or reduced faunal diversities and …