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The Granada ignimbrite: A compound pyroclastic unit and its relationship with Upper Miocene caldera volcanism in the northern Puna
(PERGAMON-ELSEVIER SCIENCE LTD, 2008)
The Granada ignimbrite, an Upper Miocene volcanic unit from the northern Puna, previously has been interpreted as an extensive ignimbrite (>2300 km(2)) associated with eruptions from the Vilama caldera (trap-door event). ...
Late Miocene ignimbrites at the southern Puna-northern Sierras Pampeanas border (~27°S): Stratigraphic correlation
(Elsevier, 2015-10)
New field observations and petrographic and geochemical data of pyroclastic deposits exposed along the Las Papas valley (border between southern Puna and northern Sierras Pampeanas, Argentina) and further north, lead us ...
A re-appraisal of the stratigraphy and volcanology of the Cerro Galán volcanic system, NW Argentina
(Springer Verlag Berlín, 2011-12)
From detailed fieldwork and biotite 40Ar/39Ar dating correlated with paleomagnetic analyses of lithic clasts, we present a revision of the stratigraphy, areal extent and volume estimates of ignimbrites in the Cerro Galán ...
Textural evidence for high-grade ignimbrites formed by low-explosivity eruptions, Parana Magmatic Province, southern Brazil
(Elsevier B.V., 2018-04-15)
The Parana-Etendeka Province is a Lower Cretaceous huge bimodal tholeiitic volcanic province (1 million.km(3)) that predated the Gondwana breakup. Its silicic portion makes up a total volume of at least 20,000 km(3) and ...
Silicic, high- to extremely high-grade ignimbrites and associated deposits from the Paraná Magmatic Province, southern Brazil
(2018-04-15)
The Cretaceous trachydacites and dacites of Chapecó type (ATC) and dacites and rhyolites of Palmas type (ATP) make up 2.5% of the ~ 800.000 km3 of volcanic pile in the Paraná Magmatic Province (PMP), emplaced at the onset ...
Characteristics and emplacement mechanisms of the Coranzulí ignimbrites (Central Andes)
(Elsevier Science, 2020-07-15)
We present a detailed stratigraphy of the Coranzulí caldera-forming deposits. This caldera, located in the Altiplano-Puna Volcanic Complex (Central Andes), generated four ignimbrite deposits with similar field characteristics ...
Yardangs in terrestrial ignimbrites: synergistic remote and field observations on Earth with applications to Mars
(Elsevier, 2010-03)
The conditions of formation and the form of yardangs in ignimbrites in the Central Andes of Chile, Bolivia, and Argentina may be the most convincing terrestrial analog to the processes and lithology that produce the extensive ...
Landscapes developed on ignimbrites
(Springer, 2017)
This paper analysesthe landforms and landscapes developed on ignimbrites outcroppingin different regions of Argentina: Portezuelo (province of Mendoza), LihuelCalel (province of La Pampa), Pilcaniyeu (province of Río Negro), ...
The flow dynamics of an extremely large volume pyroclastic flow, the 2.08-Ma Cerro Galán Ignimbrite, NW Argentina, and comparison with other flow types
(Springer Verlag Berlín, 2011-12)
The 2.08-Ma Cerro Galán Ignimbrite (CGI) represents a >630-km3 dense rock equivalent (VEI 8) eruption from the long-lived Cerro Galán magma system (∼6 Ma). It is a crystal-rich (35–60%), pumice (<10% generally) and lithic-poor ...