Results 41 to 50 of about 14,904 (246)
Bulletin of Volcanology, 2018 Broken crystals have been documented in many large-volume caldera-forming ignimbrites and can help to understand the role of crystal fragmentation in both eruption and compaction processes, the latter generally overlooked in the literature.
M. E. Zalinge, K. Cashman, R. Sparks
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Indonesian Journal on Geoscience, 2015 DOI:10.17014/ijog.2.2.111-124Batur is one of the finest known calderas on Earth, and is the source of at least two major ignimbrite eruptions with a combined volume of some 84 km3 and 19 km3.
Igan S. Sutawidjaja +2 more
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Volcanological and Geochemical Features of the Products of Sabalan’s Last Eruption, NW Iran [PDF]
پترولوژی, 2019 Sabalan volcano is located in the northwest part of Iran and 25km south of Meshkinshahr in the west Alborz-Azerbaijan structural zone. The rocks forming the Sabalan and its eastern and northern slopes are covered with significant amounts of white-gray ...
Reza Fahim Guilany +3 more
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Interpretation of Bouguer Anomaly to Determine Fault and Subsurface Structure at Blawan-ijen Geothermal Area [PDF]
, 2016 Gravity survey has been acquired by Gravimeter Lacoste & Romberg G-1035 at Blawan-Ijen geothermal area. It was a focusing study from previous research.
Azhari, A. P. (Anjar) +2 more
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Composition and correlation criteria of the rhyolitic ignimbrites in the Monts Dore volcanic field (France) [PDF]
BSGF - Earth Sciences Bulletin, 2016 Rhyolitic pyroclastic deposits, mostly ignimbrites (ash-and-pumice flow deposits) from plinian eruptions belonging to the early activity (> 2.5 Ma) of the Plio-Quaternary Monts Dore volcanic field (Massif central, France) are documented in order to ...
Bourdier Jean-Louis +3 more
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Evolution of the magma system of Pantelleria (Italy) from 190 ka to present
Comptes Rendus. Géoscience, 2021 The eruptive history of Pantelleria has been marked by the eruption of nine peralkaline ignimbrites, with inter-ignimbrite episodes from small, local volcanic centres.
Jordan, Nina J. +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
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Scientific Reports, 2016 The 39 ka Campanian Ignimbrite (CI) super-eruption was the largest volcanic eruption of the past 200 ka in Europe. Tephra deposits indicate two distinct plume forming phases, Plinian and co-ignimbrite, characteristic of many caldera-forming eruptions ...
A. Marti, A. Folch, A. Costa, S. Engwell
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Ages on weathered Plio-Pleistocene tephra sequences, western North Island, New Zealand [PDF]
, 2001 Using the zircon fission-track method, we have obtained five ages on members of two strongly-weathered silicic, Pliocene-Pleistocene tephra sequences, the Kauroa and Hamilton Ash formations, in western North Island, New Zealand.
Briggs, Roger M. +5 more
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Nature, 1961 A FIELD and laboratory study of the Ordovician ignimbrites of North Wales that has been in progress since 19531–3 has revealed certain limitations in Marshall's original hypothesis4 regarding the origin of this interesting category of rocks. These limitations have been apparent to workers elsewhere5–8.
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