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Maars to calderas: end-members on a spectrum of explosive volcanic depressions [PDF]

open access: yesFrontiers in Earth Science, 2015
We discuss maar-diatremes and calderas as end-members on a spectrum of negative volcanic landforms (depressions) produced by explosive eruptions (note – we focus on calderas formed during explosive eruptions, recognizing that some caldera types are not ...
Danilo M. Palladino   +3 more
doaj   +3 more sources

Corrigendum: Maars to calderas: end-members on a spectrum of explosive volcanic depressions [PDF]

open access: yesFrontiers in Earth Science, 2017
A corrigendum on Maars to calderas: end-members on a spectrum of explosive volcanic depressions by Palladino, D. M., Valentine, G. A., Sottili, G., and Taddeucci, J. (2015). Front. Earth Sci. 3:36. doi: 10.3389/feart.2015.00036 Reason for Corrigendum:
Danilo M. Palladino   +3 more
doaj   +3 more sources

Origin and K-Ar age of the phreatomagmatic breccia at the Trepča Pb-Zn-Ag skarn deposit, Kosovo: Implications for ore-forming processes [PDF]

open access: yesGeologia Croatica, 2016
The Trepča Pb-Zn-Ag skarn deposit in Kosovo is spatially and temporarily related to the phreatomagmatic breccia of Oligocene age (~23 Ma). The deposit shows features typical for skarn deposits worldwide, including a stage of isochemical metamorphism, a ...
Sabina Strmić Palinkaš   +6 more
doaj   +4 more sources

Updates to Concepts on Phreatomagmatic Maar-Diatremes and Their Pyroclastic Deposits [PDF]

open access: yesFrontiers in Earth Science, 2017
Recent work is changing our understanding of phreatomagmatic maar-diatreme eruptions and resulting deposits. In previous models, explosions were often inferred to take place only at the base of a diatreme, with progressive downward migration due to a ...
Greg A. Valentine   +4 more
doaj   +3 more sources

Lava lakes and shallow level magmatic feeding systems of mafic volcanoes of an ocean island: Ambrym, Vanuatu (New Hebrides), South Pacific [PDF]

open access: yes, 2006
Ambrym is an active volcanic island with 2 major vent complexes; Marum and Benbow. These vent complexes are continuously active over at least the past two thousands of years.
Cronin, Shane J., Nemeth, Karoly
core   +10 more sources

Complex styles of phreatomagmatic explosions at Kīlauea Volcano, Hawaii, controlled by magma structure

open access: yesFrontiers in Earth Science, 2023
Explosive eruptions at basaltic volcanoes remain poorly understood. Kīlauea Volcano is a type locality for basaltic eruptions and is well-known for effusive activity.
J. Schmith, D. A. Swanson
doaj   +1 more source

The influence of regional stress and structural control on the shape of maar craters

open access: yesVolcanica, 2021
Maars are volcanic craters excavated by the interaction of magma and groundwater in subsurface phreatomagmatic explosions. Maar craters display a variety of shapes and sizes, but commonly display elongation.
Cody Nichols, Alison Graettinger
doaj   +1 more source

Geoheritage and geodiversity aspects of catastrophic volcanic eruptions: Lessons from the 15th of January 2022 Hunga Tonga - Hunga Ha'apai eruption, SW Pacific

open access: yesInternational Journal of Geoheritage and Parks, 2022
On the 15th of January 2022, a massive hydrovolcanic eruption at Hunga Tonga-Hunga Ha'apai in Tonga (SW Pacific) sent shockwaves in the near-field regime, close to the volcano. The far-field disturbances that encircled the globe were of a slower velocity.
Károly Németh
doaj   +1 more source

Explosion depths for phreatomagmatic eruptions [PDF]

open access: yesGeophysical Research Letters, 2014
Subsurface phreatomagmatic explosions can result from the interaction of ascending magma with groundwater. Experiments over a wide range of energies show that for a given energy there is a depth below which an explosion will be contained within the subsurface (not erupt), and there is a corresponding shallower depth that will optimize ejecta dispersal.
Greg A. Valentine   +2 more
openaire   +1 more source

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