Member Since 2001
Jill A. Marshall
Assistant Professor, Portland State University
AGU Research
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Tall Walls and Talus Piles: Investigating the Influence of Talus and Wall Height on the Evolution of Wide Bedrock Valleys
AGU 2024
earth and planetary surface processes | 11 december 2024
Clay Robertson, Abigail L. Langston, Jill A. Marsh...
In many landscapes across the world, bedrock rivers represent the first domino to fall in the series of events required to cause broad landscape trans...
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Rock Wall Fracture Spacing as a Potential Control on River Valley Widening, Buffalo National River, Arkansas
AGU 2024
earth and planetary surface processes | 11 december 2024
Kindle Hon, Jill A. Marshall, Abigail L. Langston
River valley widening rates are often attributed to rock wall erodibility. Here, we test the alternate hypothesis that rock wall fracture patterns, ra...
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What Controls Bedrock Valley Width? Towards a Process-based Understanding of Bedrock Valley Evolution
AGU 2024
earth and planetary surface processes | 11 december 2024
Abigail L. Langston, Jill A. Marshall, Clay Robert...
Understanding how bedrock canyons evolve into wide bedrock valleys is a frontier in geomorphology. Valley width is largely controlled by lithology and...
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Post-Glacial Erosional Response of a Permafrost Landscape Across Decadal to Millennial Timescales, Aklavik Range, Arctic Canada
AGU 2024
earth and planetary surface processes | 09 december 2024
Bailey Nordin, Alexander Getraer, Jill A. Marshall...
The Arctic is warming rapidly, which is leading to accelerated permafrost thaw and erosion on upland landscapes through a combination of landslides, d...
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A Multi-Chronometer Approach to Constrain Alluvial Fan Formation in the Northwest Territories, Canada
UNRAVELING SOURCE-TO-SINK DYNAMICS FROM SEDIMENTARY RECORDS I POSTER
earth and planetary surface processes | 15 december 2023
Bailey Nordin, Alexander Getraer, Jill A. Marshall...
Climate change in the Arctic accelerates changes in already dynamic landscapes, increasing permafrost degradation and upland erosion and transport fro...
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Using Seismology to Examine the Weathering Potential of Tree-Captured Wind
LIFE AND LANDSCAPES ACROSS SCALES: HOW SURFACE PROCESSES SHAPE AND ARE SHAPED BY ECOLOGY, EVOLUTION, AND BEHAVIOR II POSTER
earth and planetary surface processes | 14 december 2023
Mel Zhang, Danica L. Roth, Valerie J. Sahakian, Ji...
Recent field studies indicate that wind energy transmitted by plant roots is an important yet unquantified driver of physical weathering and soil prod...
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Rock Wall Fracture Density as a Potential Control on River Valley Width in the Buffalo River National River, Arkansas
FLUID FLOW, SEDIMENT TRANSPORT, AND LANDSCAPE EVOLUTION IN FLUVIAL SYSTEMS ACROSS SCALES V POSTER
earth and planetary surface processes | 14 december 2023
Kindle Hon, Jill A. Marshall, Abigail L. Langston,...
Although it can seem intuitive that rock hardness is the primary control on bedrock valley widening, variations in valley width can occur even when ro...
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Key Constraints in the Seismic Signature of Tree-Captured Wind Using Collocated Pressure, Wind Speed, and Ground Motion Measurements
ENVIRONMENTAL SEISMOLOGY: A GEOPHYSICAL TOOL TO STUDY SURFACE AND NEAR-SURFACE PROCESSES II ORAL
seismology | 14 december 2023
Mel Zhang, Danica L. Roth, Valerie J. Sahakian, Ji...
Recent research has increasingly revealed the importance of biota in Critical Zone geomorphic processes such as weathering and mass movement. While ve...
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