Stratigraphy and Geology of Volcanic Areas

Groppelli, Gianluca; Viereck-Goette, L.

doi:10.1130/spe464

Cited by 13 publications

(6 citation statements)

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“…Geological survey was carried out on lithostratigraphic basis, which allowed for the definition of various formations. Indeed, lithostratigraphic units are the only ones easily recognizable in the field because of their lithology and stratigraphic position (Groppelli & Martì-Molist, 2013;Groppelli & Viereck-Goette, 2010; Martí, Groppelli, & da Silveira, 2018; Salvador, ). In addition to the stratigraphic position, we used abrupt change in lithology, presence of palaeosols, or intercalation of marine sediment to define formations.…”

Section: Methodsmentioning

confidence: 99%

Geology of La Reforma caldera complex, Baja California, Mexico

et al. 2019

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A new geological map at 1:50,000 scale of La Reforma Caldera Complex has been produced applying modern survey methodologies to volcanic areas. This map aims to represent a reliable and objective tool to understand the geological evolution of the region. La Reforma Caldera Complex is a Pleistocene nested caldera located in the central part of the Baja California peninsula, Mexico. The twelve formations defined within the Quaternary volcanic record were grouped into three phases (pre-caldera, caldera, and post-caldera). The pre-caldera phase (>1.35 Ma) is characterized by scattered eruptions, mostly occurred in submarine environment. The caldera phase (1.35-0.96 Ma) groups several distinct explosive and effusive eruptions that formed the present-day caldera depression. The post caldera phase includes scattered effusive eruptions (ended at 0.28 Ma) and resurgence, characterized by several hundred meters of uplift of the central block within the caldera depression.

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Section: Methodsmentioning

confidence: 99%

Geology of La Reforma caldera complex, Baja California, Mexico

et al. 2019

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“…The volcanic rocks of Campania have been deeply studied by different authors through different methodologies, including volcanology, geochemistry, age dating and applied geological aspects (Di Girolamo and Stanzione, 1973;Pescatore and Rolandi, 1981;Di Girolamo et al, 1984;Rosi and Sbrana, 1987;Rosi et al, 1988;De Vivo et al, 2001;Rolandi et al, 2003;De Astis et al, 2004;Deino et al, 2004;Revellino et al, 2004;. Relevant geological surveys in volcanic deposits have been recently carried out also in the Etna volcano (Sicily; Branca et al, 2004;Groppelli and Goette, 2010) addressed to the construction of significant geological maps of volcanic areas.…”

Section: Methodsmentioning

confidence: 99%

Geologic and geomorphologic study of the Terra Murata and Centane-Panoramica sites (Island of Procida, Naples Bay, Southern Tyrrhenian sea) aimed at solving some applied geological and geotechnical problems

Aiello

2018

JGC

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A geologic and geomorphologic study aimed at solving some geological and geotechnical problems, regarding the massive seepage of meteoric waters in the coastal cliffs of the Island of Procida (Naples Bay, southern Italy), composed of both tuffs and loose pyroclastic deposits, has been carried out in the geosites of Terra Murata (Middle Ages village and coastal cliff towards the Corricella Bay) and Centane-Panoramica (coastal cliff facing on the Tyrrhenian sea).A detailed geologic and geomorphologic survey has allowed to suggest solutions to the applied geological and geotechnical problems related to the occurrence of massive seepages of waters at the physical interface between pyroclastic rocks and loose pyroclastic deposits, characterized by different density, permeability and porosity and also controlled by a dense network of fractures, involving the pyroclastic deposits cropping out in the selected areas. Field sampling and geotechnical laboratory analyses have been carried out to calculate the values of main geotechnical parameters of the yellow tuffs cropping out at the Terra Murata promontory. At the same time, a detailed monitoring of the seepages of waters has been carried out through a detailed geological survey of the tuff outcrops of the promontory. The obtained results have suggested a strong control from both the geomorphologic instability of the coastal cliff and tectonic setting. At the Centane-Panoramica geosite the geological survey, coupled with geotechnical analyses and standard penetrometric tests, has accordingly evidenced that the geomorphologic instability was mainly concentrated in the sectors of the tuff coastal cliffs facing seawards towards the Tyrrhenian sea.

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“…However, until Thouret et al (1990), no comprehensive study had been conducted to understand the eruptive history of the volcanic complex, nor the volcanic facies architecture and its interaction with the terrestrial environment. Furthermore, in recent years, key changes to the understanding of basic concepts in volcanology have occurred and new internationally validated volcanic mapping and stratigraphy methods have been introduced (e.g., Fisher & Schmincke, 1984;Groppelli & Viereck-Goette, 2010;Lucchi, 2013;Martí et al, 2018;Murcia et al, 2013;Sigurdsson et al, 2000). The present study gathers and summarizes the results from integrated research conducted in recent years by the Grupo de Geología de Volcanes of the SGC on the geology, stratigraphy, and eruptive history of the NRVC (Martínez et al, 2014).…”

Section: Introductionmentioning

confidence: 93%

Chapter 7

SGC¹

2019

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New results based on modern methods of volcanic mapping and stratigraphy used in the area domain of the Nevado del Ruiz Volcano, combined with the review of previous studies and the contribution of new geochronological, petrographic, and geochemical data, are presented to define the Nevado del Ruiz Volcanic Complex. The geological evolution of this complex consists of four eruptive periods that were characterized by the construction and destruction of volcanic edifices and deposits associated with effusive products (lava flows and lava domes), primary volcaniclastic deposits (pyroclastic density currents and pyroclastic falls), secondary volcaniclastic deposits (lahars and debris avalanches), and glacial and fluvial deposits. The Pre-Ruiz eruptive period was dominated by effusive volcanism and the construction of the "Ancestral Ruiz" volcano; known ages range from 1.8 to 0.97 Ma. The First eruptive period Ruiz corresponded to the construction of the "Older Ruiz" volcano and it was defined by effusive volcanism that started less than 0.97 Ma; the construction of La Olleta Volcano began at the end of this eruptive period at approximately 107 ka, and the destructive period of the "Older Ruiz" volcano occurred at approximately 95 ka, leading to the formation of a caldera. The Intermediate eruptive period Ruiz corresponded to the origin of the volcanoes Piraña and Nereidas and to the continuation of the construction of La Olleta Volcano, as well as the occurrence of other minor eruptive centers. In the Second eruptive period Ruiz the Nevado del Ruiz Volcano was formed; this eruptive period began 66 ka ago. During the last 13 ka, explosive activity has been predominant, at least fourteen pulses and eruptive phases have occurred. The present study provides new knowledge towards understanding the eruptive history of the Nevado del Ruiz Volcanic Complex.

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Stratigraphy and Geology of Volcanic Areas

Cited by 13 publications

References 0 publications

Geology of La Reforma caldera complex, Baja California, Mexico

Geology of La Reforma caldera complex, Baja California, Mexico

Geologic and geomorphologic study of the Terra Murata and Centane-Panoramica sites (Island of Procida, Naples Bay, Southern Tyrrhenian sea) aimed at solving some applied geological and geotechnical problems

Chapter 7

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