Results 21 to 30 of about 3,224 (207)
Geosciences, 2020 Maar volcanoes are monogenetic landforms whose craters cut below the pre-eruptive surface and are surrounded by a tephra ring. Both the maar crater and the surrounding tephra rim deposits are typically formed due to magma–water explosive interactions ...
Gabriel Ureta +3 more
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Maars to calderas. End-members on a spectrum of explosive volcanic depressions [PDF]
, 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 ...
Palladino, Danilo Mauro +3 more
core +1 more source
Earth, Planets and Space, 2019 At many volcano observatories, measurements of the plume height are frequently applied. On the other hand, the recent development of the satellite measurements enables the monitoring of the SO2 mass emitted by the passive degassing at sufficient temporal
Masaaki Morita
doaj +1 more source
Evidence of two Holocene phreatomagmatic eruptions at Stromboli volcano (Aeolian Islands) from paleomagnetic data [PDF]
Geophysical Research Letters, 2006 We present detailed stratigraphic‐sedimentological and paleomagnetic analyses of Holocene phreatomagmatic deposits at Stromboli volcano (Aeolian Islands, Italy). The investigated deposits belong to the Secche di Lazzaro succession (SDL) and to the Advanced Operations Center of the Department of Civil Defense (COA) succession, both lying on the ...
M. Porreca +3 more
openaire +4 more sources
The geology and geochronology of Al Wahbah maar crater, Harrat Kishb, Saudi Arabia [PDF]
, 2014 Al Wahbah is a large (∼2.2 km diameter, ∼250 m deep) maar crater in the Harrat Kishb volcanic field in western Saudi Arabia. It cuts Proterozoic basement rocks and two Quaternary basanite lava flows, and is rimmed with an eroded tuff ring of debris from ...
Abdel Wahab, Antar +4 more
core +1 more source
Frontiers in Earth Science, 2018 At Kawah Ijen (Indonesia), vigorous SO2 and HCl degassing sustains a hyperacid lake (pH ~0) and intensely alters the subsurface, producing widespread residual silica and advanced argillic alteration products.
Jacob B. Lowenstern +6 more
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Survival of the Mýrdalsjökull ice cap through the Holocene thermal maximum: evidence from sulphur contents in Katla tephra layers (Iceland) from the last ∼8400 years [PDF]
, 2007 International audienceThe climate in Iceland was drier and warmer during the Holocene thermal maximum than it is today and it has been suggested that ice caps disappeared entirely. Katla, a volcano covered by the Mýrdalsjökull ice cap in southern Iceland,
Bergrun A. Oladottir +16 more
core +4 more sources
Journal of Palaeogeography, 2021 As the second common type of volcanic vent on Earth, maar-diatreme volcanoes and their post-eruptive lacustrine sediments are a main focus of volcanology, palaeolimnology, palaeoclimatology and palaeontology.
Cong Chen +5 more
doaj +1 more source
Geophysical Research Letters, 2019 Identification of unambiguous signals of volcanic unrest is crucial in hazard assessment. Processes leading to phreatic and phreatomagmatic eruptions remain poorly understood, inhibiting effective eruption forecasting.
J. M. deMoor +10 more
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Ignimbrite Analyses of Batur Caldera, Bali, based on 14C Dating
Indonesian Journal on Geoscience, 2014 http://dx.doi.org/10.17014/ijog.vol4no3.20094The Batur Caldera, in the northeastern part of Bali Island, is an elliptical collapse structure 13.8 by 10 km in size and another circular composite collapse structure with a diameter of 7.5 km in its centre ...
Igan S. Sutawidjaja
doaj +1 more source