Results 21 to 30 of about 14,597 (213)

Characteristics of Sub-Aerially Emplaced Pyroclasts in the Surtsey Eruption Deposits: Implications for Diverse Surtseyan Eruptive Styles

open access: yesGeosciences, 2022
The 1963–1967 shallow-to-emergent eruption in Iceland’s Vestmannaeyjar earned a place in the history of volcanology by creating the island of Surtsey while under close observation of volcanologist Sigurdur Thorarinsson (Sigurður Þórarinsson in Icelandic).
Andrea Verolino   +4 more
doaj   +1 more source

The Basaltic Monogenetic Volcanic Field of the Bakony–Balaton UNESCO Global Geopark, Hungary: From Science to Geoeducation and Geotourism [PDF]

open access: yesGeoconservation Research, 2023
As a part of the long-standing volcanism of the Carpathian–Pannonian Region, a basaltic monogenetic volcanic field developed here from 8–2.3 Ma. This is a specific type of volcanism, when mostly a small volume of magma erupts intermittently and always in
Szabolcs Harangi, Barnabás Korbély
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

Crystals and inclined conduits: analogue experiments for slug-driven volcanism

open access: yesVolcanica, 2023
Basaltic volcanism is the dominant mode of volcanism on Earth and exhibits a range of activity, from passive degassing to the most common explosive style: strombolian volcanism.
Hannah Calleja, Tom Pering
doaj   +1 more source

Explosive Volcanism in a tuff-dominated Intraplate Setting, Sarmiento Formation (Middle Eocene- lower Miocene), Patagonia Argentina

open access: yesLatin American Journal of Sedimentology and Basin Analysis, 2021
The Sarmiento Formation (middle Eocene to early Miocene) represents the distal record of the activity of the Andean volcanic arc in central Patagonia, mainly dominated by accumulation and reworking of fine ash in a low-gradient continental setting ...
José Matildo Paredes   +5 more
doaj   +2 more sources

Explosive volcanic eruptions can act as carbon sinks. [PDF]

open access: yesNat Commun
Volcanic soils, covering only ~1% of the Earth’s land, store over 5% of the global soil organic C stock. The frequent burial of these soils by tephra fallout from explosive volcanic eruptions is a critical but poorly quantified C storage process in soils
Delmelle P, Biass S, Paque M, Lobet B.
europepmc   +2 more sources

A uniform isotopic and chemical signature of dust exported from Patagonia: Rock sources and occurrence in southern environments [PDF]

open access: yes, 2007
Patagonia is considered to be the most important source of dust from South America that is deposited in surrounding areas, and we present here a systematic Sr and Nd isotopic study of sediment currently being exported.
Brunet, Frédéric   +3 more
core   +3 more sources

Chemical composition and origin of the shock metamorphic rocks of the Sääksjärvi area, Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1973
Chemical compositions of the shock metamorphic rocks of the Lake Sääksjärvi area show that the breccias are considerably richer in potassium and silica and poorer in calcium than the country rocks around Lake Sääksjärvi.
H. Papunen
doaj   +1 more source

Ice core paleovolcanic records from the St. Elias Mountains, Yukon, Canada [PDF]

open access: yes, 2007
We previously reported a record of regionally significant volcanic eruptions in the North Pacific using an ice core from Eclipse Icefield (St. Elias Mountains, Yukon, Canada).
Germani, Mark S   +4 more
core   +3 more sources

Pitted-Ground Volcanoes on Mercury

open access: yesRemote Sensing, 2022
On the planet Mercury, pyroclastic deposits formed by explosive volcanism are developed around rimless volcanic pits that are up to dozens of kilometers in diameters.
Ru Xu, Zhiyong Xiao, Yichen Wang, Rui Xu
doaj   +1 more source

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