Results 11 to 20 of about 26,142 (273)

The Osmium Isotope Signature of Phanerozoic Large Igneous Provinces

open access: yesGeophysical Monograph Series, Page 229-246., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Alexander J. Dickson   +2 more
wiley  

+16 more sources

Simultaneous effusive and explosive cinder cone eruptions at Veniaminof Volcano, Alaska

open access: yesVolcanica, 2021
Historical eruptions of Veniaminof Volcano, Alaska have all occurred at a 300-m-high cinder cone within the icefilled caldera that characterizes the volcano.
Christopher Waythomas
doaj   +1 more source

Volcanological challenges to understanding explosive large-scale eruptions

open access: yesEarth, Planets and Space, 2020
An explosive eruption, associated with the formation of a large ignimbrite sheet and collapsed caldera, is the most severe volcanic disaster on Earth.
Nobuo Geshi
doaj   +1 more source

Crystallization of peralkaline rhyolitic magmas: pre- and syn-eruptive conditions of the Pantelleria system

open access: yesComptes Rendus. Géoscience, 2021
Pantelleritic magmas are low-viscosity peralkaline rhyolites which exhibit large differences in eruptive style (explosive to effusive). The processes that promote fragmentation and explosive eruptions of pantelleritic magma remain subject to debate, but ...
Stabile, Paola   +2 more
doaj   +1 more source

Volcanic climate impacts can act as ultimate and proximate causes of Chinese dynastic collapse

open access: yesCommunications Earth & Environment, 2021
Collapses of China’s ruling dynasties were associated with explosive volcanic eruptions over the past two millennia, with the degree of influence depending on pre-existing stress in society, as suggested by a systematic analysis of eruptions and Chinese ...
Chaochao Gao   +8 more
doaj   +1 more source

Can nanolites enhance eruption explosivity? [PDF]

open access: yesGeology, 2020
Abstract Degassing dynamics play a crucial role in controlling the explosivity of magma at erupting volcanoes. Degassing of magmatic water typically involves bubble nucleation and growth, which drive magma ascent. Crystals suspended in magma may influence both nucleation and growth of bubbles.
Cáceres, Francisco   +9 more
openaire   +2 more sources

Holocene volcanism at the Quetrupillán Volcanic Complex (39°30’ S, 71°43’ W), southern Chile

open access: yesVolcanica, 2020
This paper provides the first detailed description of Holocene volcanism at the Quetrupillán Volcanic Complex. This volcanic complex consists of a truncated and eroded stratocone plus sixteen well-preserved satellite vents on its lower flanks.
Isla Simmons   +4 more
doaj   +1 more source

The pyroclastic komatiite complex at Sattasvaara in northern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1985
The Sattasvaara komatiite complex is part of an extensive zone of explosive komatiitic volcanism which may have been a significant stage in the Lapponian evolution regarded as Archean.
M. Saverikko
doaj   +1 more source

Late Holocene explosive activity of the Atsonupuri volcano (Iturup Island, Southern Kuril Islands): preliminary results [PDF]

open access: yesГеосистемы переходных зон
The first results of the study of Late Holocene activity of the Atsonupuri volcano (Iturup Island, Southern Kuril Islands) obtained during field work in 2013–2014 are presented. On the basis of tephrochronological studies and radiocarbon dating, it was
Degterev, Artem V.
doaj   +1 more source

A stress-controlled mechanism for the intensity of very large magnitude explosive eruptions [PDF]

open access: yes, 2011
Large magnitude explosive eruptions are the result of the rapid and large-scale transport of silicic magma stored in the Earth's crust, but the mechanics of erupting teratonnes of silicic magma remain poorly understood.
Costa, Antonio   +3 more
core   +1 more source

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