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Volcanic ash, tuff, etc --- Volcans --- Cendres, tufs, etc --- Volcanic ash, tuff, etc. --- Pyroclastics --- Rocks, Volcanic --- Tephra --- Tuff --- Volcanic ejecta --- Volcanic rocks --- Igneous rocks --- Andosols

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Volcanic ash, tuff, etc. --- Volcanic hazard analysis. --- Volcanic hazard analysis --- Hazard analysis, Volcanic --- Volcanic eruption hazard analysis --- Volcanic hazard assessment --- Volcanoes --- Volcanic activity prediction --- Pyroclastics --- Rocks, Volcanic --- Tephra --- Tuff --- Volcanic ejecta --- Volcanic rocks --- Igneous rocks --- Andosols --- Hazard analysis

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Volcanic ash, tuff, etc --- Volcanoes --- Volcanism --- Volcans --- Volcanisme --- Cendres, tufs, etc --- 551.21 --- Volcanos --- Landforms --- Volcanology --- Volcanicity --- Vulcanism --- Geodynamics --- Pyroclastics --- Rocks, Volcanic --- Tephra --- Tuff --- Volcanic ejecta --- Volcanic rocks --- Igneous rocks --- Andosols --- Vulcanicity. Vulcanism. Volcanoes. Eruptive phenomena. Eruptions --- 551.21 Vulcanicity. Vulcanism. Volcanoes. Eruptive phenomena. Eruptions --- Volcanologie

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55 (410) --- Earth sciences. Geology. Meteorology etc.--?<410> --- 55 (410) Earth sciences. Geology. Meteorology etc.--?<410> --- Geology, Stratigraphic --- Volcanic ash, tuff, etc --- Volcanism --- Volcanicity --- Vulcanism --- Geodynamics --- Volcanology --- Pyroclastics --- Rocks, Volcanic --- Tephra --- Tuff --- Volcanic ejecta --- Volcanic rocks --- Igneous rocks --- Andosols --- Tertiary Period

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This book analyzes the Early Cretaceous volcanic processes in Misiones Province and in Sierra Chica de Córdoba (Argentina). The volcanism in Misiones is tholeiitic and belongs to the Parana Magmatic Province (PMP), which extends throughout South America. In contrast, the volcanism in Córdoba is geographically restricted and of alkaline nature, representing a potassic locality peripheral to the PMP. To understand the causes of and geodynamic processes involved in these volcanisms, a new 40Ar /39Ar of 129.6 ± 1 Ma of a trachyte from Sierra Chica de Córdoba is presented. This dating points out that the volcanism in Sierra Chica de Córdoba slightly postdates PMP lavas. Moreover, complementary geochemical analyses from Misiones Province are presented and compared with those from the whole PMP in order to characterize its source.

Geology - General --- Geology --- Earth & Environmental Sciences --- Volcanism --- Volcanic ash, tuff, etc. --- Geology, Stratigraphic --- Cretaceous Period --- Pyroclastics --- Rocks, Volcanic --- Tephra --- Tuff --- Volcanic ejecta --- Volcanic rocks --- Volcanicity --- Vulcanism --- Igneous rocks --- Andosols --- Geodynamics --- Volcanology --- Geology. --- Geochemistry. --- Historical Geology. --- Chemical composition of the earth --- Chemical geology --- Geological chemistry --- Geology, Chemical --- Chemistry --- Earth sciences --- Geognosy --- Geoscience --- Natural history --- Historical geology.