Mauro Rosi - Academia.edu (original) (raw)
Papers by Mauro Rosi
Journal of Volcanology and Geothermal Research, 2021
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Journal Of Geophysical Research: Solid Earth, Apr 1, 2015
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RENDICONTI ONLINE DELLA SOCIETÀ GEOLOGICA ITALIANA, Sep 1, 2010
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Journal of Volcanology and Geothermal Research, Aug 1, 1999
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Bulletin of Volcanology, Apr 1, 1996
... Page 5. Fig, 4 a Proximal deposits of the Campanian Ignimbrite eruption in the sea cliff of P... more ... Page 5. Fig, 4 a Proximal deposits of the Campanian Ignimbrite eruption in the sea cliff of Pozzo Vecchio, Procida island. The outcrop is approximately 15 m high. b Detail of the base of the sintered ig-nimbrite of unit B in the same section. ...
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Journal of Volcanology and Geothermal Research, Nov 1, 1993
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Bulletin of Volcanology, Mar 1, 2013
ABSTRACT Cotopaxi volcano is situated in the Eastern Cordillera of the Ecuadorian Andes and consi... more ABSTRACT Cotopaxi volcano is situated in the Eastern Cordillera of the Ecuadorian Andes and consists of a symmetric volcanic cone that reaches an altitude of 5,897 m above sea level; it is capped over its upper 1,000 m by a permanent glacier. The volcano has erupted frequently in the past few centuries and, according to the archival records, has produced dozens of lahars by catastrophic snow and ice melting during eruptions. In this work, we present a detailed map and a stratigraphic study of the lahar deposits of the past 800 years in two different topographic settings. A thorough knowledge of the tephrostratigraphy of the explosive activity over the same time period was a first-order pre-requisite for the complete reconstruction and dating of lahar activity and also allowed us to precisely link lahar units to eruptive phases of individual eruptions. Results indicate that, during the thirteenth to seventeenth centuries, high-intensity eruptions (Plinian events or blast-like explosions) produced large debris flows that transported meter-sized boulders. A subsequent period of activity that started in 1742 was characterized by several lahar-generating eruptive episodes that were smaller in scale but with significant variability in size (the 1877 being the smallest and most recent). Analysis of events occurring in the eighteenth century suggests that eruption style affects the volume and energy of the resulting lahars, with different pyroclastic flow types causing different mechanisms of water release from the summit glacier. Lahars produced during this time period were triggered by: (1) dilute pumice and ash-rich radially distributed density currents and (2) column collapse-related radially distributed scoria and lithic-rich pyroclastic-flows. The former produced lahar deposits that are matrix-rich, block-poor, and valley-confined, while the high erosive capacity of the latter produced lahars that are block-rich, highly energetic, and widespread. The youngest (1853 and 1877) lahars were triggered by (3) confined scoria-flow lobes that had less capacity to scour and melt the glacier; resulting flows had lower energy and smaller volumes than lahars produced by eighteenth-century eruptions. We conclude that the dynamics of pyroclastic–density–current can exert a major control on the size and destructive capacity of lahar at ice-capped volcanoes. Moreover, the total extent of the glacier at the moment of eruption, which is commonly considered to exert a major control on lahar formation, may actually be a second-order factor compared with the way in which the eruptive products interact with the glacier.
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Physics of the Earth and Planetary Interiors, Dec 1, 2006
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Journal of Volcanology and Geothermal Research, Sep 1, 1983
The main event within the volcanic history of the Phlegraean Fields was the eruption, about 35,00... more The main event within the volcanic history of the Phlegraean Fields was the eruption, about 35,000 years ago, of a huge alkali trachytic ignimbrite (80 km 3 , dre) followed by caldera collapse. The pre-caldera activity (evidence from geothermal wells and surface outcrops) changed from ...
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AGU Fall Meeting Abstracts, Dec 1, 2005
The 2450 BP Plinian eruption of Pululagua is known to have occurred in no-wind condition, resulti... more The 2450 BP Plinian eruption of Pululagua is known to have occurred in no-wind condition, resulting in circular-shape isopach and isopleth maps. Previous studies showed that the Plinian fallout is composed of 3 main units: the basal grey ash (BGA), the basal Plinian fallout (BF) and the white ash (WA). This study focuses on the BF unit, (consisting of three
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AGUFM, Dec 1, 2006
Tephra deposits result from the combination of plume rising and particle dispersal through the at... more Tephra deposits result from the combination of plume rising and particle dispersal through the atmosphere. The description of particle sedimentation is therefore complicated by the interaction between volcanic plumes and atmospheric processes. Most volcanic clouds are advected by tropospheric winds and Plinian eruptions typically generate columns that can reach the stratospheric jet stream. As a result, the physical model describing
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Journal of applied volcanology, Dec 7, 2021
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Geophysical monograph, Mar 19, 2013
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Frontiers in Earth Science, Feb 17, 2022
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Journal of Volcanology and Geothermal Research, 2021
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Journal Of Geophysical Research: Solid Earth, Apr 1, 2015
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RENDICONTI ONLINE DELLA SOCIETÀ GEOLOGICA ITALIANA, Sep 1, 2010
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Journal of Volcanology and Geothermal Research, Aug 1, 1999
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Bulletin of Volcanology, Apr 1, 1996
... Page 5. Fig, 4 a Proximal deposits of the Campanian Ignimbrite eruption in the sea cliff of P... more ... Page 5. Fig, 4 a Proximal deposits of the Campanian Ignimbrite eruption in the sea cliff of Pozzo Vecchio, Procida island. The outcrop is approximately 15 m high. b Detail of the base of the sintered ig-nimbrite of unit B in the same section. ...
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Journal of Volcanology and Geothermal Research, Nov 1, 1993
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Bulletin of Volcanology, Mar 1, 2013
ABSTRACT Cotopaxi volcano is situated in the Eastern Cordillera of the Ecuadorian Andes and consi... more ABSTRACT Cotopaxi volcano is situated in the Eastern Cordillera of the Ecuadorian Andes and consists of a symmetric volcanic cone that reaches an altitude of 5,897 m above sea level; it is capped over its upper 1,000 m by a permanent glacier. The volcano has erupted frequently in the past few centuries and, according to the archival records, has produced dozens of lahars by catastrophic snow and ice melting during eruptions. In this work, we present a detailed map and a stratigraphic study of the lahar deposits of the past 800 years in two different topographic settings. A thorough knowledge of the tephrostratigraphy of the explosive activity over the same time period was a first-order pre-requisite for the complete reconstruction and dating of lahar activity and also allowed us to precisely link lahar units to eruptive phases of individual eruptions. Results indicate that, during the thirteenth to seventeenth centuries, high-intensity eruptions (Plinian events or blast-like explosions) produced large debris flows that transported meter-sized boulders. A subsequent period of activity that started in 1742 was characterized by several lahar-generating eruptive episodes that were smaller in scale but with significant variability in size (the 1877 being the smallest and most recent). Analysis of events occurring in the eighteenth century suggests that eruption style affects the volume and energy of the resulting lahars, with different pyroclastic flow types causing different mechanisms of water release from the summit glacier. Lahars produced during this time period were triggered by: (1) dilute pumice and ash-rich radially distributed density currents and (2) column collapse-related radially distributed scoria and lithic-rich pyroclastic-flows. The former produced lahar deposits that are matrix-rich, block-poor, and valley-confined, while the high erosive capacity of the latter produced lahars that are block-rich, highly energetic, and widespread. The youngest (1853 and 1877) lahars were triggered by (3) confined scoria-flow lobes that had less capacity to scour and melt the glacier; resulting flows had lower energy and smaller volumes than lahars produced by eighteenth-century eruptions. We conclude that the dynamics of pyroclastic–density–current can exert a major control on the size and destructive capacity of lahar at ice-capped volcanoes. Moreover, the total extent of the glacier at the moment of eruption, which is commonly considered to exert a major control on lahar formation, may actually be a second-order factor compared with the way in which the eruptive products interact with the glacier.
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Physics of the Earth and Planetary Interiors, Dec 1, 2006
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Journal of Volcanology and Geothermal Research, Sep 1, 1983
The main event within the volcanic history of the Phlegraean Fields was the eruption, about 35,00... more The main event within the volcanic history of the Phlegraean Fields was the eruption, about 35,000 years ago, of a huge alkali trachytic ignimbrite (80 km 3 , dre) followed by caldera collapse. The pre-caldera activity (evidence from geothermal wells and surface outcrops) changed from ...
Bookmarks Related papers MentionsView impact
AGU Fall Meeting Abstracts, Dec 1, 2005
The 2450 BP Plinian eruption of Pululagua is known to have occurred in no-wind condition, resulti... more The 2450 BP Plinian eruption of Pululagua is known to have occurred in no-wind condition, resulting in circular-shape isopach and isopleth maps. Previous studies showed that the Plinian fallout is composed of 3 main units: the basal grey ash (BGA), the basal Plinian fallout (BF) and the white ash (WA). This study focuses on the BF unit, (consisting of three
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
AGUFM, Dec 1, 2006
Tephra deposits result from the combination of plume rising and particle dispersal through the at... more Tephra deposits result from the combination of plume rising and particle dispersal through the atmosphere. The description of particle sedimentation is therefore complicated by the interaction between volcanic plumes and atmospheric processes. Most volcanic clouds are advected by tropospheric winds and Plinian eruptions typically generate columns that can reach the stratospheric jet stream. As a result, the physical model describing
Bookmarks Related papers MentionsView impact
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Journal of applied volcanology, Dec 7, 2021
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Geophysical monograph, Mar 19, 2013
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Frontiers in Earth Science, Feb 17, 2022
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