Results 1 to 10 of about 3,246 (166)

Ignimbrite flare-ups and their drivers: A New Zealand perspective

open access: yesEarth-Science Reviews, 2016
Ignimbrite flare-ups are periods of intense silicic volcanism characterized by multiple caldera-forming eruptions that together evacuate 103 to 104 km3 of magma.
Graham S Leonard, J V Rowland
exaly   +2 more sources

Eruption Style, Emplacement Dynamics and Geometry of Peralkaline Ignimbrites: Insights From the Lajes-Angra Ignimbrite Formation, Terceira Island, Azores [PDF]

open access: yesJournal of Petrology, 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.
Gertisser, Ralf
core   +3 more sources

A crystal concentration method for calculating ignimbrite volume from distal ash-fall deposits and a reappraisal of the magnitude of the Campanian Ignimbrite

open access: yesJournal of Volcanology and Geothermal Research, 2014
Distribution of ignimbrites is controlled chiefly by preexisting topography forming thin veneer deposits on steepslope relief and thicker, valley-ponding deposits in valley bottoms.
Claudio Scarpati, Annamaria Perrotta
exaly   +2 more sources

Mineralogical and petrological features of the Cemilköy ignimbrite, Cappadocia, Turkey

open access: yesChemie Der Erde, 2018
The Cemilkoy ignimbrite is one of the voluminous ignimbrite deposits in Cappadocia. The Cemilkoy ignimbrite contains pumice and lithic clasts of volcanic and ophiolitic origin in an ash matrix. The unwelded Cemilkoy ignimbrite is distinguished from other
Abidin Temel, Alain Gourgaud
exaly   +2 more sources

Rheomorphic structures in a high-grade ignimbrite: the Nuraxi tuff, Sulcis volcanic district (SW Sardinia, Italy)

open access: yesJournal of Volcanology and Geothermal Research, 2005
Deposits of the 15.8 Ma Nuraxi explosive eruption crop out in the Sulcis volcanic district, southwestern Sardinia. They consist of a decimeter-thick pumice fallout layer overlain, with no apparent temporal break, by several tens of meters thick, high ...
L Pioli, Mauro Rosi
exaly   +2 more sources

Landscape evolution in ignimbrite terrain : a study of the Mamaku Plateau, Taupō Volcanic Zone, New Zealand. [PDF]

open access: yes, 2021
Landscape evolution in ignimbrite terrains is complex due to the diverse, heterogeneous nature of ignimbrite deposits. Globally, little landscape evolution research has been conducted on ignimbrite terrains, especially multi-ignimbrite systems.
Kidd, Maia Josephine
core   +1 more source

The incrementally zoned Miocene Ayagaures ignimbrite (Gran Canaria, Canary Islands) [PDF]

open access: yes, 2010
The 20–25 m thick trachyphonolitic Ayagaures ignimbrite cooling unit [(AY); 11.8 Ma] exposed over 250 km2 (onshore volume ca. 4.5 km3 DRE) is the uppermost and most voluminous cooling unit of the Middle Fataga Formation (MFF), part of the Fataga Group ...
Hans-Ulrich Schmincke   +5 more
core   +1 more source

Isotopic evidence for open system processes within the Campanian Ignimbrite (Campi Flegrei–Italy) magma chamber

open access: yes, 2009
New Sr and Nd isotope data for whole rocks, glasses and minerals are combined to reconstruct the nature and origin of mixing end-members of the 200 km3 trachytic to phonolitic Campanian Ignimbrite (Campi Flegrei, Italy) magmatic system.
Heumann, I.   +4 more
core   +2 more sources

Volcanic geology of the early Pleistocene ignimbrite succession in the western Papamoa Region, Bay of Plenty [PDF]

open access: yes, 2022
Volcanic activity in the Tauranga Volcanic Center (TgaVC) occurred between 2.95 to 1.9 Ma, some of the eruptions were explosive and led to the distribution of ignimbrites of varying volumes across the western Bay of Plenty Region (Tauranga Basin), North ...
Namaliu, Miriam Darusila Mangon
core  

Thermal impact of dykes on ignimbrite and implications for fluid flow compartmentalisation in calderas

open access: yes, 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.
Kennedy, Ben M.   +25 more
core   +1 more source

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