Browsing Geology by Title

Now showing items 143-162 of 285

The geology, mineralization and geochemistry of the Pine Creek area, Lemhi County, Idaho

Hillesland, Larry L. (1981-05-18)
Geology, petrology, and geochemistry of the Jersey, East Jersey, Huestis, and Iona porphyry copper-molybdenum deposits, Highland Valley, British Columbia

Briskey, Joseph A. (1980-06-05)
Geology, petrology, and mineralization of the Paisley Mountains plutonic complex, Lake County, Oregon

Hammitt, Jay Wayne (1976-05-13)
Groundwater flow and radionuclide transport in fault zones in granitic rock

Geier, Joel E. (2004-12-10)

Fault zones are potential paths for release of radioactive nuclides from radioactive-waste repositories in granitic rock. This research considers detailed maps of en echelon fault zones at two sites in southern Sweden, ...
Helium isotope variations in peridotite, gabbro and basalt from the Kane Oceanic Core Complex

Konrad, Kevin (2012-10-05)

The Kane Oceanic Core Complex (OCC) is a valuable window into crustal architecture and chemical composition of the lithosphere beneath a slow-spreading ocean ridge. A suite of > 30 samples (comprised of whole rocks, mine ...
Hydrogeologic field investigation and groundwater flow model of the southern Willamette Valley, Oregon

Craner, Jeremy D. (2006-04-05)

Elevated groundwater nitrate (NO3 -) concentrations in the Southern Willamette Valley (SWV) caused the Oregon Department of Environmental Quality (ODEQ) to declare a Groundwater Management Area (GWMA) in Spring, 2004. ...
Hydrology and geomorphic evolution of basaltic landscapes, High Cascades, Oregon

Jefferson, Anne (Anne Jarvis) (2006-10-13)

The basaltic landscapes of the Oregon High Cascades form a natural laboratory for examining how geologic setting and history influence groundwater flowpaths, streamflow sensitivity to climate, and landscape evolution. In ...
Igneous petrology, structural geology, and mineralization of the central part of the Bayhorse Mining District, Custer County, Idaho

Hodges, Wade Allan (1977-09-14)

The central part of the Bayhorse Mining District is located in the Salmon River Mountains in north-central Idaho between the towns of Challis and Clayton. The area is underlain by metasedimentary rocks of Early to Middle ...
Interpreting a weird and scenic landscape to park visitors : tectonic and volcanic processes of Craters of the Moon National Monument and Preserve, Idaho

Truitt, Kimberly E. (2006-07-24)

This thesis develops a geology training manual for the Interpretation staff of Craters of the Moon National Monument and Preserve (CRMO) in southern Idaho. The manual will help the staff convey geologic principles to pa ...
Interpreting geology in Yosemite National Park, California : a monument to strong granite, powerful glaciers, and the perseverance of life

Dunham, Sarah E. (2008-01-02)

This thesis develops a thematic, geology-based interpretive training manual for the interpretive staff at Yosemite National Park (YNP), California. The manual will help staff understand and convey geologic principles to ...
Investigation of the hydraulic, physical, and chemical buffering capacity of Missoula Flood Deposits for water quality and supply in the Willamette Valley of Oregon

Iverson, Justin (2002-04-26)

The Willamette Silt is a surficial geologic unit composed of successive Missoula Flood Deposits that underlies 3100 km2 (1200 mil) of arable land in the Willamette Valley of Oregon. The Willamette Silt protects the under ...
Lacustrine micro-fossil assemblage in core NP04-KH3, a Kullenberg piston core from the Moba-Kalya Horst region of Lake Tanganyika, East Africa, as a biogeochemical proxy for Late Pleistocene and Early Holocene climate and lake level changes

Steinkamp, Matthew J. (2006-04-26)

The objective of this research is to determine the correlation of lacustrine micro-fossils in Lake Tanganyika to changes in climate and lake levels during the Late Pleistocene and Early Holocene. Lake Tanganyika is the ...
Landslide occurrence in the Elk and Sixes River basins, southwest Oregon

McHugh, Margaret H. (1986-12-10)

Timber management of coastal watersheds in southwest Oregon has been complicated by the need to protect anadromous fish habitat from accelerated stream sedimentation resulting from management activity. The rugged terr ...
The late holocene atmospheric methane budget reconstructed from ice cores

Mitchell, Logan E. (2013-03-04)

Ice cores are considered the gold standard for recording past climate and biogeochemical changes. However, gas records derived from ice core analysis have until now been largely limited to centennial and longer timescal ...
Late Pleistocene and Holocene glacier and climate change

Marcott, Shaun Andrew (2011-05-05)

This dissertation presents results from three studies that address major scientific questions in glacial geology and paleoclimatology for the late Pleistocene and Holocene using relatively new geochemical and statistical ...
Late Quaternary sedimentation and geologic history of the North Willamette Valley, Oregon

Glenn, Jerry L. (1965-01-16)

Late Quaternary sediments in the Willamette Valley, Oregon, include a unit of chiefly silt and fine sand, the Willamette Silt Formation. Previous workers have (1) Assigned the Willamette Silt different ages which range f ...
Lithofacies, stratiography, and geology of the middle eocene type cowlitz formation and associated volcanic and sedimentary units, Eastern Willapa Hills, southwest Washington

Payne, Charles William (1998-03-09)

Stratigraphic measurement of the 1,238-rn thick Cowlitz Formation in the southwest Washington type section along Olequa and Stillwater creeks reveals complex facies succession of wave- to tide-dominated deltaic sequenc ...
Magma chamber processes over the past 475,000 years at Mount Hood, Oregon : insights from crystal zoning and crystal size distribution studies

Darr, Cristina M. (2007-01-30)

Several different petrological techniques have been applied to lava flows between 200 to 475,000 years old from Mount Hood, Oregon. Mount Hood is unusual, in comparison to nearby Mount St. Helens and Mount Jefferson, in ...
Mass movement dynamics, geomorphology and their relationship to geology in the North Fork Siuslaw drainage basin, Oregon Coast Range

Graham, James Duncan, 1954- (1985-05-28)
Meeting of the magmas : the evolutionary history of the Kalama Eruptive Period, Mount St. Helens, Washington

Lieuallen, Athena Erin (2010-10-14)

Comprehension of eruptive histories is critical in understanding the evolution of magmatic systems at arc volcanoes and may supply evidence to the petrogenesis of intermediate and evolved magmas. Within the 300 ka erupt ...