Results 1 to 10 of about 136 (68)

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, Patricia Vazquez, Nicanor Prendes   +2 more
doaj   +1 more source

The relationship between ignimbrite lithofacies and topography in a foothill setting formed on Miocene pyroclastics – a case study from the Bükkalja, Northern Hungary

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, Mátyás Hencz, Tamás Telbisz, Zoltán Cseri, Dávid Karátson   +4 more
doaj   +1 more source

Zircon U-Pb geochronology and trace element dataset from the Southern Rocky Mountain Volcanic Field, Colorado, USA

Data in Brief, 2022
This contribution provides in-situ LA-ICP-MS U-Pb ages and trace element determinations of zircons from dacitic to rhyolitic lavas, ignimbrites and intrusions in the Southern Rocky Mountain Volcanic Field (SRMVF) in Colorado, USA.
J.T. Sliwinski, M. Guillong, P.W. Lipman, M.J. Zimmerer, C. Deering, O. Bachmann   +5 more
doaj   +1 more source

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

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, Adriano Pimentel, Stephen Self, José M. Pacheco, Adam J. Jeffery, Ralf Gertisser   +5 more
doaj   +1 more source

Varying processes, similar results: How composition influences fragmentation and subsequent feeding of large pyroclastic density currents

Frontiers in Earth Science, 2022
Unlike their silicic counterparts, mafic eruptions are known for being on the low-end of the explosivity spectrum with eruption styles commonly ranging from effusive to Hawaiian fire fountaining.
Olivier Bernard, Olivier Bernard, Olivier Bernard, Caroline Bouvet de Maisonneuve, Caroline Bouvet de Maisonneuve, Laurent Arbaret, Laurent Arbaret, Kazuhide Nagashima, Jeffrey Oalmann, Arief Prabowo, Antonius Ratdomopurbo   +10 more
doaj   +1 more source

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., White, John C., Macdonald, Ray, Rotolo, Silvio G.   +3 more
doaj   +1 more source

Magnetic Fabrics and Source Implications of Chisulryoung Ignimbrites, South Korea

Frontiers in Earth Science, 2016
The anisotropy of magnetic susceptibility (AMS) of late Cretaceous ash-flow tuffs in Chisulryoung Volcanic Formation, southeastern Korea was studied to define the primary pyroclastic flow azimuth.
Hoabin Hong, Yongjae Yu, Seong-Jae Doh, Dongwoo Suk, Jeongmin Kim   +4 more
doaj   +1 more source

Conic-Based 3D Rockfall Modeling with QGIS-Qproto Software: A Case Study of Mazı Village, Nevşehir (Ürgüp)

Doğal Afetler ve Çevre Dergisi, 2023
This study focuses on the high-resolution 3D cone-based rockfall modeling using Qproto, a QGIS plugin, based on UAV-DSM data in an area near Mazı Village, located north of Derinkuyu and Ürgüp districts in Nevşehir province, where rockfall events occur ...
Mustafa Utlu, Mehmet Fatih Akgümüş
doaj   +1 more source

The analysis of spatial distributions, origins of caldera-forming eruptions with basaltic-andesitic magma compositions, and genesis of Miocene ignimbrites of the Eastern volcanic belt, Kamchatka

Геодинамика и тектонофизика, 2019
Based on the statistical data of the Global Volcanism Program of the Smithsonian Institution and published materials, we present a comparative analysis of caldera-forming eruptions on global scale.
O. V. Bergal-Kuvikas, A. N. Rogozin, E. S. Klyapitsky   +2 more
doaj   +1 more source

Evidence for an Active, Transcrustal Magma System in the Last 60 ka and Eruptive Degassing Budget (H2O, CO2, S, F, Cl, Br): The Case of Dominica

Geochemistry, Geophysics, Geosystems, 2020
The Morne Trois Pitons‐Micotrin volcanic complex on the island of Dominica (Lesser Antilles) emitted a series of plinian eruptions between 18 and 9 ka BP.
T. d'Augustin, H. Balcone‐Boissard, G. Boudon, C. Martel, E. Deloule, P. Bürckel   +5 more
doaj   +1 more source