A5081896701- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Geological Studies and Exploration
- Landslides and related hazards
- Maritime and Coastal Archaeology
- Oceanographic and Atmospheric Processes
- Methane Hydrates and Related Phenomena
- High-pressure geophysics and materials
- Geological formations and processes
- Hydrology and Sediment Transport Processes
- Hydrocarbon exploration and reservoir analysis
Fort Lewis College
2023-2025
University of Oregon
2021-2023
Cascade (United States)
2021
Volcanic provinces are among the most active but least well understood landscapes on Earth. Here, we show that central Cascade arc, USA, exhibits systematic spatial covariation of topography and hydrology linked to aging volcanic bedrock, suggesting controls landscape evolution. At crest, a locus Quaternary volcanism, water circulates deeply through upper [Formula: see text]1 km crust transitions shallow dominantly horizontal flow as rocks age away from arc front. We argue this pattern...
40Ar/39Ar detrital sanidine (DS) dating of river terraces provides new insights into the evolution and bedrock incision history San Juan River, a major tributary Colorado USA, at million-year time scale. We dated terrace flights from Juan−Colorado River confluence to Rocky Mountains. report >5700 40Ar/ 39Ar dates on single DS grains axial facies within several meters above straths 30 individual terraces; these yielded ∼2.5% young (<2 Ma) that constrain maximum depositional ages...
Along subduction zones, high-relief topography is associated with sustained volcanism parallel to the plate margin. However, relationship between magmatism and mountain building in arcs poorly understood. Here, we study patterns of surface deformation correlated fluvial knickpoints Columbia River Gorge link long-term uplift ensuing topographic development Cascade Range. An upwarped paleochannel exposed walls constrains unsteady deep magma flux, ratio intrusive extrusive magmatic...
Mountain building in arc settings occurs through an interplay between the eruption and intrusion of mantle-derived magma, superimposed on regional tectonics. Although challenging to deconvolve, topography records local magmatic history as well structural erosional response volcanic perturbations. There is no better setting study these processes than Columbia River Gorge, where persistent incision by has provided a time-evolving cross section Cascade Arc pulse high output, accompanied...