Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"canyonlands"”.
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Occupancy and Abundance of Golden-cheeked Warblers (Dendroica chrysoparia) on the Balcones Canyonlands Preserve
… the goldencheeked warbler on the Balcones Canyonlands Preserve in Travis County, Texas. Occupancy and abundance were estimated using data from point-count surveys conducted on each of five 100 hectare detection girds in 2008 and seven grids in 2009. Data were analyzed using both single …
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Structural observations and stratigraphic variability in Jurassic strata, Upheaval Dome, Canyonlands National Park, Utah, USA
… deformed topographic depression located in Canyonlands National Park, southeast Utah. Multiple hypotheses for its origin have been proposed by various scientists over many years of research. The two remaining viable hypotheses are at opposite ends of the geologic spectrum, one proposing …
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Influences of Borders on Golden-Cheeked Warbler Habitat in the Balcones Canyonlands Preserve, Travis County, Texas
Destruction and fragmentation of breeding habitat threaten populations of many migrant songbird species, including the endangered Golden-cheeked Warbler. Fragmentation increases the proportion of habitat close to environmental borders, exposing flora and fauna in the bordering habitat to biotic and …
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Influence of Geomorphological Origin Upon Macroinvertebrate Community Structure in Black Hills Streams
… community structure. The Crystalline Canyonlands were dominated by larger order streams, with lower quality invertebrate habitat, associated with geomorphic structure and stream position in the drainage pattern. Macroinvertebrate community structure was different in the Crystalline …
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Fault formation in porous sedimentary rocks at high strain rates
… at the Upheaval Dome impact structure in Canyonlands National Park, southeast Utah, where high strain rate conditions are known to have occurred. We found no evidence for DBDZ formation along the fault planes at Upheaval Dome. Instead pulverized quartz grains within the Navajo Sandstone …
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The effect of preexisting joints on normal fault evolution : insights from fieldwork and analogue modeling
… Grabens Area of the Needles fault zone in the Canyonlands National Park, Utah/USA was chosen as field analogue. This arcuate array of young grabens (younger than SI{100}{ka}) extends over several kilometers along the Colorado River in Permian brittle lithologies with distinct preexisting joint …
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New incision rates on the Colorado River system based on cosmogenic burial dating of terraces : implications for a transient knickpoint at Lees Ferry and differential uplift of the Rocky Mountains
… uplift of the Colorado Rockies relative to the Canyonlands and Uinta Basin regions. This may be driven by mantle bouyancy associated with the Aspen Anomaly of central Colorado. The overall conclusions of this paper are that: 1) differential incision across the Lees Ferry and Desolation …
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Modeling canopy foliar traits and disturbance interactions in central Texas woodlands.
The present study examines canopy foliar traits and their interactions with the greater ecosystem at multiple scales. Leaf mass/area ratios, nitrogen, and phosphorus were measured and were shown to correlate with relative light levels in some species. Leaf nutrition is used as the basis for a leaf …