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Sandro Conticelli - One of the best experts on this subject based on the ideXlab platform.

  • cyclic growth and mass wasting of submarine los frailes lava flow and dome complex in cabo de gata se spain
    Journal of Volcanology and Geothermal Research, 2012
    Co-Authors: Carles Soriano, Nancy R Riggs, Guido Giordano, Massimiliano Porreca, Sandro Conticelli
    Abstract:

    Abstract The Los Frailes Formation lava-flow and dome complex is a Miocene succession that is part of the Cabo de Gata volcanic zone of SE Spain. The complex comprises dominantly dacitic, subaqueous dome rocks and interstratified sedimentary horizons emplaced over a few tens of thousands of years. Facies of the Los Frailes Formation include coherent lava, in-situ hyaloclastite, locally with microfossil-bearing siltstone matrix, pumiceous and block-rich tuff, and massive monomict breccia and Megabreccia, in which clasts are locally several metres in diameter. The monomict Megabreccias display both “block facies” and “matrix facies” architecture and show internal deformation at the block-matrix contacts. They are inferred to have derived from debris avalanches. Facies are divided into four volcanic units separated by fossiliferous marine sedimentary units emplaced during hiatuses in volcanism. The Los Frailes Formation lava-flow and dome complex were emplaced in a shallow setting that may have included emergent areas. Lava flows and the margins of dome edifices interacted with sea water to form hyaloclastite, and pyroclastic currents deposited pumiceous materials. Sector collapse of marine domes fed small-volume debris avalanches with generally the same facies and distribution of facies as the larger-scale equivalents on which traditional models are built.

  • Cyclic growth and mass wasting of submarine Los Frailes lava flow and dome complex in Cabo de Gata, SE Spain
    Journal of Volcanology and Geothermal Research, 2012
    Co-Authors: Carles Soriano, Guido Giordano, Massimiliano Porreca, Nancy Riggs, Sandro Conticelli
    Abstract:

    The Los Frailes Formation lava-flow and dome complex is a Miocene succession that is part of the Cabo de Gata volcanic zone of SE Spain. The complex comprises dominantly dacitic, subaqueous dome rocks and interstratified sedimentary horizons emplaced over a few tens of thousands of years. Facies of the Los Frailes Formation include coherent lava, in-situ hyaloclastite, locally with microfossil-bearing siltstone matrix, pumiceous and block-rich tuff, and massive monomict breccia and Megabreccia, in which clasts are locally several metres in diameter. The monomict Megabreccias display both >block facies> and >matrix facies> architecture and show internal deformation at the block-matrix contacts. They are inferred to have derived from debris avalanches. Facies are divided into four volcanic units separated by fossiliferous marine sedimentary units emplaced during hiatuses in volcanism. The Los Frailes Formation lava-flow and dome complex were emplaced in a shallow setting that may have included emergent areas. Lava flows and the margins of dome edifices interacted with sea water to form hyaloclastite, and pyroclastic currents deposited pumiceous materials. Sector collapse of marine domes fed small-volume debris avalanches with generally the same facies and distribution of facies as the larger-scale equivalents on which traditional models are built. © 2012 Elsevier B.V.This research was funded by projects CGL2005-03511/BTE, HI2006-0073 and CGL2009-06968-E from the Ministerio de Ciencia e Innovación of Spain. Chemical analyseswere performedwith the financial support of ItalianMIUR — PRIN 2008 funds, and grant 2008HMHYFP_002 issued to Conticelli.Peer Reviewe

Carles Soriano - One of the best experts on this subject based on the ideXlab platform.

  • cyclic growth and mass wasting of submarine los frailes lava flow and dome complex in cabo de gata se spain
    Journal of Volcanology and Geothermal Research, 2012
    Co-Authors: Carles Soriano, Nancy R Riggs, Guido Giordano, Massimiliano Porreca, Sandro Conticelli
    Abstract:

    Abstract The Los Frailes Formation lava-flow and dome complex is a Miocene succession that is part of the Cabo de Gata volcanic zone of SE Spain. The complex comprises dominantly dacitic, subaqueous dome rocks and interstratified sedimentary horizons emplaced over a few tens of thousands of years. Facies of the Los Frailes Formation include coherent lava, in-situ hyaloclastite, locally with microfossil-bearing siltstone matrix, pumiceous and block-rich tuff, and massive monomict breccia and Megabreccia, in which clasts are locally several metres in diameter. The monomict Megabreccias display both “block facies” and “matrix facies” architecture and show internal deformation at the block-matrix contacts. They are inferred to have derived from debris avalanches. Facies are divided into four volcanic units separated by fossiliferous marine sedimentary units emplaced during hiatuses in volcanism. The Los Frailes Formation lava-flow and dome complex were emplaced in a shallow setting that may have included emergent areas. Lava flows and the margins of dome edifices interacted with sea water to form hyaloclastite, and pyroclastic currents deposited pumiceous materials. Sector collapse of marine domes fed small-volume debris avalanches with generally the same facies and distribution of facies as the larger-scale equivalents on which traditional models are built.

  • Cyclic growth and mass wasting of submarine Los Frailes lava flow and dome complex in Cabo de Gata, SE Spain
    Journal of Volcanology and Geothermal Research, 2012
    Co-Authors: Carles Soriano, Guido Giordano, Massimiliano Porreca, Nancy Riggs, Sandro Conticelli
    Abstract:

    The Los Frailes Formation lava-flow and dome complex is a Miocene succession that is part of the Cabo de Gata volcanic zone of SE Spain. The complex comprises dominantly dacitic, subaqueous dome rocks and interstratified sedimentary horizons emplaced over a few tens of thousands of years. Facies of the Los Frailes Formation include coherent lava, in-situ hyaloclastite, locally with microfossil-bearing siltstone matrix, pumiceous and block-rich tuff, and massive monomict breccia and Megabreccia, in which clasts are locally several metres in diameter. The monomict Megabreccias display both >block facies> and >matrix facies> architecture and show internal deformation at the block-matrix contacts. They are inferred to have derived from debris avalanches. Facies are divided into four volcanic units separated by fossiliferous marine sedimentary units emplaced during hiatuses in volcanism. The Los Frailes Formation lava-flow and dome complex were emplaced in a shallow setting that may have included emergent areas. Lava flows and the margins of dome edifices interacted with sea water to form hyaloclastite, and pyroclastic currents deposited pumiceous materials. Sector collapse of marine domes fed small-volume debris avalanches with generally the same facies and distribution of facies as the larger-scale equivalents on which traditional models are built. © 2012 Elsevier B.V.This research was funded by projects CGL2005-03511/BTE, HI2006-0073 and CGL2009-06968-E from the Ministerio de Ciencia e Innovación of Spain. Chemical analyseswere performedwith the financial support of ItalianMIUR — PRIN 2008 funds, and grant 2008HMHYFP_002 issued to Conticelli.Peer Reviewe

Massimiliano Porreca - One of the best experts on this subject based on the ideXlab platform.

  • cyclic growth and mass wasting of submarine los frailes lava flow and dome complex in cabo de gata se spain
    Journal of Volcanology and Geothermal Research, 2012
    Co-Authors: Carles Soriano, Nancy R Riggs, Guido Giordano, Massimiliano Porreca, Sandro Conticelli
    Abstract:

    Abstract The Los Frailes Formation lava-flow and dome complex is a Miocene succession that is part of the Cabo de Gata volcanic zone of SE Spain. The complex comprises dominantly dacitic, subaqueous dome rocks and interstratified sedimentary horizons emplaced over a few tens of thousands of years. Facies of the Los Frailes Formation include coherent lava, in-situ hyaloclastite, locally with microfossil-bearing siltstone matrix, pumiceous and block-rich tuff, and massive monomict breccia and Megabreccia, in which clasts are locally several metres in diameter. The monomict Megabreccias display both “block facies” and “matrix facies” architecture and show internal deformation at the block-matrix contacts. They are inferred to have derived from debris avalanches. Facies are divided into four volcanic units separated by fossiliferous marine sedimentary units emplaced during hiatuses in volcanism. The Los Frailes Formation lava-flow and dome complex were emplaced in a shallow setting that may have included emergent areas. Lava flows and the margins of dome edifices interacted with sea water to form hyaloclastite, and pyroclastic currents deposited pumiceous materials. Sector collapse of marine domes fed small-volume debris avalanches with generally the same facies and distribution of facies as the larger-scale equivalents on which traditional models are built.

  • Cyclic growth and mass wasting of submarine Los Frailes lava flow and dome complex in Cabo de Gata, SE Spain
    Journal of Volcanology and Geothermal Research, 2012
    Co-Authors: Carles Soriano, Guido Giordano, Massimiliano Porreca, Nancy Riggs, Sandro Conticelli
    Abstract:

    The Los Frailes Formation lava-flow and dome complex is a Miocene succession that is part of the Cabo de Gata volcanic zone of SE Spain. The complex comprises dominantly dacitic, subaqueous dome rocks and interstratified sedimentary horizons emplaced over a few tens of thousands of years. Facies of the Los Frailes Formation include coherent lava, in-situ hyaloclastite, locally with microfossil-bearing siltstone matrix, pumiceous and block-rich tuff, and massive monomict breccia and Megabreccia, in which clasts are locally several metres in diameter. The monomict Megabreccias display both >block facies> and >matrix facies> architecture and show internal deformation at the block-matrix contacts. They are inferred to have derived from debris avalanches. Facies are divided into four volcanic units separated by fossiliferous marine sedimentary units emplaced during hiatuses in volcanism. The Los Frailes Formation lava-flow and dome complex were emplaced in a shallow setting that may have included emergent areas. Lava flows and the margins of dome edifices interacted with sea water to form hyaloclastite, and pyroclastic currents deposited pumiceous materials. Sector collapse of marine domes fed small-volume debris avalanches with generally the same facies and distribution of facies as the larger-scale equivalents on which traditional models are built. © 2012 Elsevier B.V.This research was funded by projects CGL2005-03511/BTE, HI2006-0073 and CGL2009-06968-E from the Ministerio de Ciencia e Innovación of Spain. Chemical analyseswere performedwith the financial support of ItalianMIUR — PRIN 2008 funds, and grant 2008HMHYFP_002 issued to Conticelli.Peer Reviewe

Guido Giordano - One of the best experts on this subject based on the ideXlab platform.

  • cyclic growth and mass wasting of submarine los frailes lava flow and dome complex in cabo de gata se spain
    Journal of Volcanology and Geothermal Research, 2012
    Co-Authors: Carles Soriano, Nancy R Riggs, Guido Giordano, Massimiliano Porreca, Sandro Conticelli
    Abstract:

    Abstract The Los Frailes Formation lava-flow and dome complex is a Miocene succession that is part of the Cabo de Gata volcanic zone of SE Spain. The complex comprises dominantly dacitic, subaqueous dome rocks and interstratified sedimentary horizons emplaced over a few tens of thousands of years. Facies of the Los Frailes Formation include coherent lava, in-situ hyaloclastite, locally with microfossil-bearing siltstone matrix, pumiceous and block-rich tuff, and massive monomict breccia and Megabreccia, in which clasts are locally several metres in diameter. The monomict Megabreccias display both “block facies” and “matrix facies” architecture and show internal deformation at the block-matrix contacts. They are inferred to have derived from debris avalanches. Facies are divided into four volcanic units separated by fossiliferous marine sedimentary units emplaced during hiatuses in volcanism. The Los Frailes Formation lava-flow and dome complex were emplaced in a shallow setting that may have included emergent areas. Lava flows and the margins of dome edifices interacted with sea water to form hyaloclastite, and pyroclastic currents deposited pumiceous materials. Sector collapse of marine domes fed small-volume debris avalanches with generally the same facies and distribution of facies as the larger-scale equivalents on which traditional models are built.

  • Cyclic growth and mass wasting of submarine Los Frailes lava flow and dome complex in Cabo de Gata, SE Spain
    Journal of Volcanology and Geothermal Research, 2012
    Co-Authors: Carles Soriano, Guido Giordano, Massimiliano Porreca, Nancy Riggs, Sandro Conticelli
    Abstract:

    The Los Frailes Formation lava-flow and dome complex is a Miocene succession that is part of the Cabo de Gata volcanic zone of SE Spain. The complex comprises dominantly dacitic, subaqueous dome rocks and interstratified sedimentary horizons emplaced over a few tens of thousands of years. Facies of the Los Frailes Formation include coherent lava, in-situ hyaloclastite, locally with microfossil-bearing siltstone matrix, pumiceous and block-rich tuff, and massive monomict breccia and Megabreccia, in which clasts are locally several metres in diameter. The monomict Megabreccias display both >block facies> and >matrix facies> architecture and show internal deformation at the block-matrix contacts. They are inferred to have derived from debris avalanches. Facies are divided into four volcanic units separated by fossiliferous marine sedimentary units emplaced during hiatuses in volcanism. The Los Frailes Formation lava-flow and dome complex were emplaced in a shallow setting that may have included emergent areas. Lava flows and the margins of dome edifices interacted with sea water to form hyaloclastite, and pyroclastic currents deposited pumiceous materials. Sector collapse of marine domes fed small-volume debris avalanches with generally the same facies and distribution of facies as the larger-scale equivalents on which traditional models are built. © 2012 Elsevier B.V.This research was funded by projects CGL2005-03511/BTE, HI2006-0073 and CGL2009-06968-E from the Ministerio de Ciencia e Innovación of Spain. Chemical analyseswere performedwith the financial support of ItalianMIUR — PRIN 2008 funds, and grant 2008HMHYFP_002 issued to Conticelli.Peer Reviewe

C.d. Woodhouse - One of the best experts on this subject based on the ideXlab platform.

  • Chaotic breccia zones on the Pembroke Peninsula, south Wales: Evidence for collapse into voids along dilational faults
    Journal of Structural Geology, 2014
    Co-Authors: Nigel Woodcock, A.v.m. Miller, C.d. Woodhouse
    Abstract:

    Chaotic breccias and Megabreccias – locally called gash breccias – hosted within the Pembroke Limestone Group (Visean, Mississippian, lower Carboniferous) of southwest Wales are re-mapped along with spatially-related crackle and mosaic breccias. Of thirteen studied Megabreccia bodies, seven lie along steep, NNW- or NNE-striking strike-slip faults originating during north–south Variscan (late Carboniferous) shortening, though reactivated during later extension. Four bodies are conformable with E–W striking, steeply-dipping bedding, and two have irregular or indeterminate margins. The bedding-parallel zones are interpreted as the dilational tips of listric normal faults, and the cross-strike faults as transtensional transfer zones. Sub-horizontal clast fabrics suggest brecciation by gravitational collapse into opening fissures rather than by cataclasis along the faults. Most fissures have geometrically matched margins produced by this dilational faulting, and only locally have the indented margins indicating solutional processes. The most likely age for the main fissure extension and fill is late Triassic, based on analogous dated fills at the eastern end of the Bristol Channel Basin. The Pembroke Megabreccias blur the distinction between fault rocks formed by deformation and those formed by redeposition along fault zones.

  • Chaotic breccia zones on the Pembroke Peninsula, South Wales: evidence for collapse into voids along dilational faults
    Journal of Structural Geology, 2014
    Co-Authors: Woodcock Nigel, Miller Avm, C.d. Woodhouse
    Abstract:

    Chaotic breccias and Megabreccias – locally called gash breccias – hosted within the Pembroke Limestone Group (Visean, Mississippian, lower Carboniferous) of southwest Wales are re-mapped along with spatially-related crackle and mosaic breccias. Of thirteen studied Megabreccia bodies, seven lie along steep, NNW- or NNE-striking strike-slip faults originating during north-south Variscan (late Carboniferous) shortening, though reactivated during later extension. Four bodies are conformable with E-W striking, steeply-dipping bedding, and two have irregular or indeterminate margins. The bedding-parallel zones are interpreted as the dilational tips of listric normal faults, and the cross-strike faults as transtensional transfer zones. Sub-horizontal clast fabrics suggest brecciation by gravitational collapse into opening fissures rather than by cataclasis along the faults. Most fissures have geometrically matched margins produced by this dilational faulting, and only locally have the indented margins indicating solutional processes. The most likely age for the main fissure extension and fill is late Triassic, based on analogous dated fills at the eastern end of the Bristol Channel Basin. The Pembroke Megabreccias blur the distinction between fault rocks formed by deformation and those formed by redeposition along fault zones.This is the accepted manuscript version. The final version is available from Elsevier at http://www.sciencedirect.com/science/article/pii/S0191814114002338