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 - Cas, Ray; Wright, Heather; Folkes, Christopher; Lesti, Chiara; Porreca, Massimiliano; Giordano, Guido; Viramonte, Jose (Bulletin of Volcanology, 2011)