Results 1 to 10 of about 14,904 (246)
Frontiers in Earth Science, 2021 Ignimbrites are relatively uncommon on ocean island volcanoes and yet they constitute a significant portion of the stratigraphy of Terceira Island (Azores). The Lajes-Angra Ignimbrite Formation (ca.
Adriano Pimentel +5 more
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Large-magnitude (VEI ≥ 7) ‘wet’ explosive silicic eruption preserved a Lower Miocene habitat at the Ipolytarnóc Fossil Site, North Hungary [PDF]
Scientific Reports, 2022 During Earth’s history, geosphere-biosphere interactions were often determined by momentary, catastrophic changes such as large explosive volcanic eruptions.
Dávid Karátson +14 more
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Subsurface geophysical profiling in Awash Melkesa: Insights into lithology and resource potential. [PDF]
PLoS ONEIntegrated geophysical investigations were conducted around Awash Melkesa, located 106 km southeast of Addis Ababa, utilizing electrical resistivity, magnetic, radiometric, and seismic refraction methods.
Eyayu Ayalew Dessalew +2 more
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A 13.06 Ma widespread ignimbrite in the Pannonian Basin captured a snapshot of shallow marine to coastal environment in Central Paratethys [PDF]
Scientific ReportsVoluminous Miocene silicic volcanism sourced mainly from the extensional Pannonian Basin played a major role in the evolution of the Central Paratethys.
Dávid Karátson +21 more
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Thermal impact of dykes on ignimbrite and implications for fluid flow channelisation in a caldera
Volcanica, 2022 Ignimbrites within calderas host intrusions with hazardous and/or economically significant hydrothermal systems. The Hvítserkur ignimbrite at Breiðuvík caldera, north-eastern Iceland, is intruded by basaltic dykes.
Ben Kennedy +11 more
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Frontiers in Earth Science, 2021 The Aso-4 caldera-forming event (86.4 ± 1.1 ka, VEI-8) is the second largest volcanic eruption Earth experienced in the past 100 ka. The ignimbrite sheets produced during this event are some of the first ever described compositionally zoned pyroclastic ...
Franziska Keller +3 more
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Wide-ranging and Violent Volcanic History of a Quiet Transborder Area: Volcanic Geoheritage of the Novohrad–Nógrád UNESCO Global Geopark [PDF]
Geoconservation Research, 2023 The Novohrad–Nógrád UNESCO Global Geopark is the first cross-border geopark located between Slovakia and Hungary, Eastern–Central Europe. “Ancient world without borders” – its motto reflects both the remarkable geodiversity and the strong link between ...
Szabolcs Harangi +2 more
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Properties of the Ignimbrites in the Architecture of the Historical Center of Arequipa, Peru
Applied Sciences, 2021 The petrographic and petrophysical characteristics of three varieties of ignimbrites used in the architectural heritage of Arequipa (southwest Peru) are analyzed. The modal classification QAFP and TAS diagram discriminate their dacitic nature.
Rosa Bustamante +2 more
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Frontiers in Earth Science, 2020 Estimations of the distribution and eruptive volume of large-scale pyroclastic density current (PDCs) and tephra fall deposits are essential for evaluation of the affected area, long-term volcanic hazards assessments, volcanic activity, and geophysical ...
Shinji Takarada, Hideo Hoshizumi
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Hungarian Geographical Bulletin, 2022 Units with extremely variable erodibility are typical in the succession of pyroclastic-dominated volcanic fields. Welded ignimbrites are usually resistant to erosion, thus, they often appear as positive landforms, i.e., mesas or tilted plateaus after ...
Tamás Biró +4 more
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