Results 101 to 110 of about 2,053 (253)

Along‐Strike Seismic Structure of the Andreanof Aleutian Arc Segment and Implications for the Formation of Continental Crust

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 6, June 2026.
Abstract Crust formed in volcanic arcs is accreted to continents over geologic time, serving as the source material for new continental crust in Earth's present and recent past. Geochemically, arcs are found to be significantly more mafic than bulk continental crust.
Hannah F. Mark, Daniel Lizarralde, Donna J. Shillington, Valeria Cortés‐Rivas, Mark D. Behn   +4 more
wiley   +1 more source

The Pomici di Avellino eruption of Somma-Vesuvius (3.9 ka BP) part II: Sedimentology and physical volcanology of pyroclastic density current deposits

, 2010
Pyroclastic density currents (PDCs) generated during the Plinian eruption of the Pomici di Avellino (PdA) of Somma-Vesuvius were investigated through field and laboratory studies, which allowed the detailed reconstruction of their eruptive and ...
MELE D, DI VITO M. A, SULPIZIO, ROBERTO, LA VOLPE L., DELLINO, Pierfrancesco, BONASIA R   +5 more
core   +1 more source

Grain Size Sorting and Steady Bars Formation in Straight Channels—Part 1: Laboratory Experiments

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 6, June 2026.
Abstract Surface grain size in gravel‐bed rivers is inherently heterogeneous, with marked spatial variability that remains challenging to predict, even in the presence of regular bedforms. This study investigates surface grain size variability on self‐formed alternate bars at the scale of a single bar unit, and is divided in two parts.
Marco Redolfi, Niccolò Ragno, Matilde Welber, Walter Bertoldi   +3 more
wiley   +1 more source

Grain Size Sorting and Steady Bars Formation in Straight Channels—Part 2: Linear Theory

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 6, June 2026.
Abstract This is the second of two papers aimed to investigate grain sorting patterns associated with the formation of steady alternate bars in gravel‐bed rivers. Part 1 presented the analysis of a series of tailored experiments, performed in a mobile bed laboratory flume with fixed, straight banks. The results showed that a consistent pattern of grain
Niccolò Ragno, Marco Redolfi
wiley   +1 more source

Predictive Models for Postfire Debris Flow Initiation in the Southwest USA

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 6, June 2026.
Abstract Postfire debris flows pose a threat to life and infrastructure and significantly contribute to sediment supply in upland channels, thereby impacting water quality, stream habitats, and landscape evolution. Models designed to assess postfire debris‐flow likelihood at the watershed scale in response to design or forecast rainstorms are ...
Ana Isabel Fernandez Sirgo, Luke A. McGuire, Ann M. Youberg, Tao Liu   +3 more
wiley   +1 more source

The young volcanic regions of southeastern Australia: Early studies, physical volcanology and eruption risk

, 2004
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

Modeling the Anthropogenic Effects on Watershed Evolution Trajectory: An Example From the Chestatee River in Northern Georgia, USA

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 6, June 2026.
Abstract Human activities shape erosion dynamics and landscape evolution, making effective modeling approaches essential for understanding these impacts. This study utilizes landscape evolution models with a streamlined parameterization process to evaluate the anthropogenic effects on the erosional trajectory of the Chestatee River watershed in ...
Christopher E. Sheehan, Mark D. Behn, Noah P. Snyder, Travis A. Dahl, Ilan Valencius   +4 more
wiley   +1 more source

Controls on Valley‐Floor Width in the Western Andes

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 6, June 2026.
Abstract River‐valley floors are low relief, confined parts of the landscape that store sediment en route from mountains to lowlands. Transient sediment storage influences sediment budgets, biogeochemical cycles, and the preservation of environmental signals. The controls on valley‐floor width remain poorly understood, limiting the ability to reproduce
S. Tofelde, F. J. Clubb, B. Bookhagen
wiley   +1 more source

Physical volcanology and hydrothermal alteration of the Rainy River Gold Project, northwest Ontario.

, 2011
University of Minnesota M.S. thesis. July 2011. Major: Geological sciences. Advisor:Dr. Ron Morton. 1 computer file (PDF); vii, 154 pages, appendices I-II.The Rainy River Gold Project (RRGP) is located 75km northwest of Fort Frances, Ontario, within the
Wartman, Jakob Michael
core  

Linked Canyons and Fans Communicate Through a Migrating Bedrock‐Alluvial Transition

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 6, June 2026.
Abstract Net‐erosional fluvial landscapes are often treated separately from net‐depositional fluvial landscapes. Yet these landscapes are often tightly linked by means of a moving‐boundary bedrock‐alluvial transition. We consider a linked canyon‐fan system in a Basin and Range province, basing our work loosely on Rainbow Canyon and Panamint Valley, USA.
Li Zhang, Gary Parker, Jeffrey Nittrouer, Xudong Fu, Shanghong Zhang, Guangqian Wang   +5 more
wiley   +1 more source