Results 21 to 30 of about 2,249 (210)

Flow-direction and palaeoslope indicators in rheomorphic ignimbrites: Structural studies on Pantelleria & Gran Canaria

open access: yes, 2022
Pyroclastic density currents (PDCs), alongside other density currents (i.e. turbidity currents, lahars, dust storms or avalanches), are principal mechanisms for lateral sediment transport across varying landscapes.
Gregor Hahn (7807967)
core   +1 more source

Composition and correlation criteria of the rhyolitic ignimbrites in the Monts Dore volcanic field (France) [PDF]

open access: yesBSGF - 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
doaj   +1 more source

Localization features of pyrite-polymetallic ores of the Tushkanikhinskoye deposit (Rudny Altai)

open access: yesРуды и металлы, 2022
The Tushkanikhinskoye deposit is confined to the Devonian basalt-bearing rhyolite calcareous-siliceous-terrigenous formation, which is represented by sedimentary, volcano-sedimentary, sedimentary-volcanogenic, pyroclastic, volcanic rocks of felsic and ...
Tatiana V. Seravina   +4 more
doaj   +1 more source

The Magnitude of the 39.8 ka Campanian Ignimbrite Eruption, Italy: Method, Uncertainties and Errors

open access: yesFrontiers in Earth Science, 2020
The calculation of the magnitude of an eruption needs the accurate estimate of its deposit volume. This is particularly critical for ignimbrites as no methods for their volume calculations and associated errors and uncertainties are consolidated in the ...
Aurora Silleni   +4 more
doaj   +1 more source

Hydraulic properties of ignimbrites: matrix and fracture permeabilities in two pyroclastic flow deposits from Cimino‐Vico volcanoes (Italy) [PDF]

open access: yes, 2022
Hydrological properties of ignimbrites are known in detail only for some areas, although these rocks cover large areas with considerable thicknesses in many volcanic regions of the world.
Vincenzo Allocca   +4 more
core   +1 more source

Characteristics and properties of Bitlis ignimbrites and their environmental implications

open access: yesMateriales de Construccion, 2020
Bitlis rock is used as a construction material and comes from the lava emitted by volcanoes and their subsequent transformation into ignimbrites. This type of rocks has been characterized physically, chemi­cally, toxicologically and radioactively using ...
E. Işık   +4 more
doaj   +1 more source

Paleoproterozoic felsic volcanism of Iricoumé group, Erepecuru-Trombetas domain, Amazonian central province: Field and petrographic characterization and Pb-Pb zircon geochronology [PDF]

open access: yesGeologia USP. Série Científica, 2013
The Iricoumé group consists of very well preserved pyroclastic and effusive volcanic rocks as a part of an extensive volcano-plutonic event, which marked the central part of the Amazonian craton during the Orosirian. Such rocks occur in the southern part
Lúcia Travassos da Rosa Costa   +3 more
doaj   +1 more source

Isotopic and Petrologic Investigation, and a Thermomechanical Model of Genesis of Large-Volume Rhyolites in Arc Environments: Karymshina Volcanic Complex, Kamchatka, Russia

open access: yesFrontiers in Earth Science, 2019
The Kamchatka Peninsula of eastern Russia is currently one of the most volcanically active areas on Earth where a combination of >8 cm/yr subduction convergence rate and thick continental crust generates large silicic magma chambers, reflected by ...
Ilya N. Bindeman   +8 more
doaj   +1 more source

Digital geologic map, petrography and U-Pb geochronology of the Río Santiago Shear Zone, southernmost Sierra Madre Occidental, western Mexico

open access: yesTerra Digitalis, 2022
The boundary between the Sierra Madre Occidental (SMO) and the Trans-Mexican Volcanic Belt (TMVB) is well exposed along the Santiago River, on the border of the states of Nayarit and Jalisco.
Juan Carlos Castillo Reynoso   +3 more
doaj   +1 more source

Eruption and emplacement timescales of ignimbrite super-eruptions from thermo-kinetics of glass shards

open access: yesFrontiers in Earth Science, 2015
Super-eruptions generating hundreds of cubic kilometres of pyroclastic density currents are commonly recorded by thick, welded and lava-like ignimbrites.
Yan eLavallée   +11 more
doaj   +1 more source

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