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This stratovolcano is located on the North American continental plate above the subducting Juan de Fuca oceanic plate. A magnitude 5.1 earthquake on May 18, 1980, triggered a massive landslide (∼ 3 km 3 of debris) on the north flank leading to a sudden surge of magma, reducing the elevation of the mountain summit by ∼ 400 m to form a 1.6-km ...
Abstract. We studied the shape of the most regular-shaped stratovolcanoes of the world to mathematically define the form of the ideal stratovolcano. Based on the Shuttle Radar Topographic Mission data we selected 19 of the most circular and symmetrical volcanoes, which incidentally all belong to subduction-related arcs surrounding the Pacific.
Here, we present major and trace element volcanic rock compositions from Antuco Volcano, Chile, a typical continental arc stratovolcano, in order to characterise chalcophile behaviour during the generation and subsequent processing of magmas through a continental arc. Bulk compositions at Antuco span basaltic to andesitic compositions (Lopez ...
Abstract. We studied the shape of the most regular-shaped stratovolcanoes of the world to mathematically define the form of the ideal stratovolcano. Based on the Shuttle Radar Topographic Mission data we selected 19 of the most circular and symmetrical volcanoes, which incidentally all belong to subduction-related arcs surrounding the Pacific.
Villarrica stratovolcano basalts (<53% SiO 2) have a larger proportion of phenocrysts (up to 20% of sample volume) than most of the SEC basalts (Caburgua, Cerro Redondo, Huelemolle, La Barda), which contain less than 6% phenocrysts. Except for SEC San Jorge, SEC samples are composed of a fine-grained plagioclase-rich intersertal groundmass.
The Nemrut stratovolcano is the most interesting volcanic center in the region with its large collapse caldera and last known lava eruptions at 1441 A.D. (Oswalt, 1912). The volcano is located on the western shore of the Lake Van, the largest soda lake in the world, covering a surface area of 3573 km 2 .
To address these gaps in knowledge, a comprehensive study was completed of a central intrusive complex near the base of the eroded Summer Coon stratovolcano in Colorado (USA; Fig. 1). I investigated the geometry and distribution of CIC intrusions and their host rock using detailed geologic mapping and a ground-based magnetic survey.
The Sancy stratovolcano s.s. lies on the southeastern flank of the Guéry stratovolcano, north of the Plio–Pleistocene Cézallier volcanic area in the central part of the FMC (Fig. 1). The Sancy covers about 16 km 2. Its activity started about 1.0 Ma ago (Pastre and Cantagrel, 2001). Volcanic products belong to both undersaturated (basanites ...
Volcanological evolution of Hasan Dagi stratovolcano Hasan Dagi is a double-peaked (3253 m and 3069 m) stratovolcano covering an area of about 760 km 2 , with a volume of about 354 km 3 . Three successive stages of edifice construction have been recognized for this volcano: Paleo-, Meso- and Neo-Hasan Dagi (Aydar, 1992).
Turrialba stratovolcano in Costa Rica has been persistently active with periods of eruptive activity punctuating sustained passive degassing for the past ∼20 years (Vaselli et al., 2009; Martini et al., 2010; Campion et al., 2012; Conde et al., 2014; Di Piazza et al., 2015; de Moor et al., 2016; Rizzo et al., 2016; Epiard et al., 2017 ...