Results 21 to 30 of about 85,438 (161)

Pre‐Eruptive Outgassing and Pressurization, and Post‐Fragmentation Bubble Nucleation, Recorded by Vesicles in Breadcrust Bombs From Vulcanian Activity at Guagua Pichincha Volcano, Ecuador

Journal of Geophysical Research: Solid Earth, Volume 128, Issue 9, September 2023., 2023
Abstract Breadcrust bombs formed during Vulcanian eruptions are assumed to originate from the shallow plug or dome. Their rim to core texture reflects the competition between cooling and degassing timescales, which results in a dense crust with isolated vesicles contrasting with a highly vesicular vesicle network in the interior. Due to relatively fast
M. Colombier, M. Manga, H. Wright, B. Bernard, R. deGraffenried, F. Cáceres, P. Samaniego, J. Vasseur, K. Jakata, P. Cook, D. B. Dingwell   +10 more
wiley   +1 more source

Guanaco colonisation of Tierra del Fuego Island from mainland Patagonia: Walked, swam, or by canoe?

Geo: Geography and Environment, Volume 9, Issue 2, July‐December 2022., 2022
A geographical and biological puzzle that has perplexed scientists since the late 1800s working in southern South America: why are there so few vertebrates on the island of Tierra del Fuego compared to the adjacent Patagonia mainland, including the absence of the ubiquitous Guanaco (Lama guanicoe), wild camelid of the south? An interdisciplinary search
William L. Franklin
wiley   +1 more source

Volcanic Hot-Spot Detection Using SENTINEL-2: A Comparison with MODIS−MIROVA Thermal Data Series [PDF]

, 2020
In the satellite thermal remote sensing, the new generation of sensors with high-spatial resolution SWIR data open the door to an improved constraining of thermal phenomena related to volcanic processes, with strong implications for monitoring ...
Cigolini, Corrado, Coppola, Diego, Laiolo, Marco, Massimetti, Francesco, Ripepe, Maurizio, Valade, Sébastien   +5 more
core   +1 more source

Predicting Patagonian Landslides: Roles of Forest Cover and Wind Speed

Geophysical Research Letters, Volume 48, Issue 23, 16 December 2021., 2021
Abstract Dense tree stands and high wind speeds characterize the temperate rainforests of southern Chilean Patagonia, where landslides frequently strip hillslopes of soils, rock, and biomass. Assuming that wind loads on trees promote slope instability, we explore the role of forest cover and wind speed in predicting landslides with a hierarchical ...
Eric Parra, Christian H. Mohr, Oliver Korup   +2 more
wiley   +1 more source

Explosive Behavior of Intermediate Magmas: The Example of Cotopaxi Volcano (Ecuador)

Geochemistry, Geophysics, Geosystems, Volume 22, Issue 11, November 2021., 2021
Abstract The variability in intensity and style shown by explosive volcanism has been traditionally explained by a complex interplay among melt composition and pre‐eruptive volatile content, which modulate magma ascent and conduit dynamics. However, magmas having similar compositions may be characterized by subtle textural changes affecting magma ...
M. Pistolesi, A. Aravena, L. Costantini, C. Vigiani, R. Cioni, C. Bonadonna   +5 more
wiley   +1 more source

Impact of volcanism on the sedimentary record of the Neuquén rift basin, Argentina: towards a cause and effect model [PDF]

, 2018
The analysis of volcano-sedimentary infill in sedimentary basins constitutes a challenge for basin analysis and hydrocarbon exploration worldwide. In order to understand the contribution of volcanism to the sedimentary record in rift basins, we study the
Abebe, Acocella, Acocella, Acocella, Aguirre-Díaz, Allan, Allen, Backert, Bahk, Baker, Baker, Bernard, Bilmes, Blair, Blair, Blair, Bosworth, Brantley, Brown, Busby, Cabrera, Caineng, Cas, Chambefort, Chorowicz, Clavero, Cole, Corvec, Costa, Coussot, Cristallini, D'Elia, D'Elia, D'Elia, D'Elia, Damborenea, Davidson, Downs, Dupraz, Ebinger, Ebinger, Ebinger, Feng, Ferguson, Fisher, Fisher, Fisher, Franzese, Franzese, Franzese, Gawthorpe, Glicken, Goodbred, Gravley, Groeber, Gudmundsson, Hackett, Haughton, Hayes, Hinterwimmer, Howell, Karátson, Lara, Leanza, Leeder, Leeder, Legarreta, Legarreta, Lenhardt, Lipman, Lipman, Manville, Martina, Martí, Mathisen, McPherson, McPhie, Moore, Moore, Morel, Morley, Muravchik, Muravchik, Nemec, Nishikia, Németh, Németh, Németh, Orton, Palmer, Palmer, Palmer, Paredes, Parfitt, Petterson, Pierson, Postma, Postma, Pángaro, Pángaro, Ramos, Ramos, Ravnås, Reading, Reading, Riding, Riggs, Rowland, Rowland, Schiuma, Schlische, Schlische, Schlische, Schneider, Scott, Scott, Shultz, Siebert, Skilling, Smith, Smith, Smith, Smith, Smith, Spalletti, Spinks, Sruoga, Sruoga, Stipanicic, Stipanicic, Talbot, Thouret, Tucker, Ui, Uliana, Umazano, Van Wyk De Vries, Varela, Vergani, Vergani, Vessell, Walker, White, White, Wilson, Wolfenden, Wolfenden, Wooller, Wyk de Vries, Zanchetta, Ziegler   +150 more
core   +2 more sources

Arsenic-bearing phases in South Andean volcanic ashes: Implications for As mobility in aquatic environments [PDF]

, 2015
Three samples of volcanic ashes collected after eruptions of the volcanos Hudson in 1991, Chaitén in 2008 and Puyehue in 2011 were analyzed in order to define the solid speciation of arsenic and the dynamics of its release to the aqueous phase.
Bia, Gonzalo Luis, Borgnino Bianchi, Laura Carolina, Gaiero, Diego Marcelo, Garcia, Maria Gabriela   +3 more
core   +1 more source

The Influence of Chemical and Mineral Compositions on the Parameterization of Immersion Freezing by Volcanic Ash Particles

Journal of Geophysical Research: Atmospheres, Volume 126, Issue 17, 16 September 2021., 2021
Abstract Volcanic ash (VA) from explosive eruptions contributes to aerosol loadings in the atmosphere. Aside from the negative impact of VA on air quality and aviation, these particles can alter the optical and microphysical properties of clouds by triggering ice formation, thereby influencing precipitation and climate.
N. S. Umo, R. Ullrich, E. C. Maters, I. Steinke, N. Benker, K. Höhler, R. Wagner, P. G. Weidler, G. A. Hoshyaripour, A. Kiselev, U. Kueppers, K. Kandler, D. B. Dingwell, T. Leisner, O. Möhler   +14 more
wiley   +1 more source

Emplacement of the Rocche Rosse rhyolite lava flow (Lipari, Aeolian Islands) [PDF]

, 2018
The authors acknowledge Airbus Defence and Space for providing satellite imagery, financial support from Keele University and fieldwork grants from the Mineralogical Society of Great Britain and Ireland and the Volcanic and Magmatic Studies Group.
Bullock, Liam A, Gertisser, Ralf, O’Driscoll, Brian   +2 more
core   +2 more sources

Bayesian geomorphology

Earth Surface Processes and Landforms, Volume 46, Issue 1, Page 151-172, January 2021., 2021
Geomorphologists rarely use Bayesian methods in their research, often relying instead on model averages that largely miss out on the variability of form and process. The aim of this article is to introduce the Bayesian toolkit to scientists concerned with Earth surface processes and landforms, and to show how geomorphic models might benefit from ...
Oliver Korup
wiley   +1 more source