Results 81 to 90 of about 78,130 (318)

New 40Ar/39Ar dating of the Grande Ronde lavas, Columbia River Basalts, USA: Implications for duration of flood basalt eruption episodes [PDF]

open access: yes, 2010
Grande Ronde Basalt (GRB) lavas represent the most voluminous eruptive pulse of the Columbia River-Snake River-Yellowstone hotspot volcanism. With an estimated eruptive volume of 150,000 km3, GRB lavas form at least 66% of the total volume of the ...
Barry, T. L.   +5 more
core   +1 more source

“The Excuses We Make”: Defining Eight Corruption Rationalization Categories

open access: yesRegulation &Governance, EarlyView.
ABSTRACT The rationalization of corruption allows individuals to detach from moral imperatives, enabling them to perceive unethical or unlawful actions as acceptable or justifiable. Closely linked to the concept of moral disengagement, rationalization involves cognitive distortions that frame inhumane or immoral behavior as neither wrong nor ...
Caio César Coelho Rodrigues
wiley   +1 more source

The 1984 Mauna Loa eruption and planetary geolgoy [PDF]

open access: yes
In planetary geology, lava flows on the Moon and Mars are commonly treated as relatively simple systems. Some of the complexities of actual lava flows are illustrated using the main flow system of the 1984 Mauna Loa eruption. The outline, brief narrative,
Moore, Henry J.
core   +1 more source

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

open access: yesSedimentology, EarlyView.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti   +5 more
wiley   +1 more source

Some lava flows may not have been as thick as they appear [PDF]

open access: gold, 2021
Jonas Katona   +4 more
openalex   +2 more sources

The 1998 eruption of Axial Seamount: New insights on submarine lava flow emplacement from high‐resolution mapping

open access: yesGeochemistry, Geophysics, Geosystems, 2013
Axial Seamount, an active submarine volcano on the Juan de Fuca Ridge at 46°N, 130°W, erupted in January 1998 along 11 km of its upper south rift zone.
W. W. Chadwick Jr.   +10 more
doaj   +1 more source

Toward a model for leveed lava flows [PDF]

open access: yes
Many lava flows have two distinct volumetric components during emplacement. First, there is a component actively flowing in accordance with Newtonian or other constitutive relations.
Baloga, Stephen
core   +1 more source

Evolution Model for the Paleoproterozoic Talvivaara Mudstone‐Hosted Ni‐Zn‐Cu‐Co Deposit in Fennoscandia

open access: yesTerra Nova, EarlyView.
ABSTRACT The Paleoproterozoic Talvivaara mudstone is a very large sulfidic Ni‐Co deposit that records enhanced organic matter accumulation during the global Shunga Event. Here, rock geochemistry and microscale S and Fe isotope composition of in situ pyrrhotites and pyrites are studied in well‐characterised, well‐preserved drill core samples.
Raimo Lahtinen   +3 more
wiley   +1 more source

Quantitative analysis of the 1981 and 2001 Etna flank eruptions: a contribution for future hazard evaluation and mitigation

open access: yesAnnals of Geophysics, 2011
Lava flows produced during Etna flank eruptions represent severe hazards for the nearby inhabited areas, which can be protected by adopting prompt mitigation actions, such as the building of diversion barriers.
Cristina Proietti   +3 more
doaj   +1 more source

Lava‐seawater interactions at shallow‐water submarine lava flows

open access: yesGeophysical Research Letters, 1991
Hydrothermal plumes associated with nearshore lava flows from Kilauea Volcano, Hawaii were studied on five occasions during 1989–1990 to address the current lack of data on direct lava‐seawater interactions. The following enrichments were found in the sea‐surface hydrothermal plumes above the active underwater lava flows: H2, 15,000x ambient seawater ...
Sansone, Francis J.   +5 more
openaire   +3 more sources

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