An umbrella cloud model to explain thickness and grain size variation in tephra deposits: Pululagua (Ecuador)
Robert Constantinescu, University of South Florida Tampa, School of Geosceinces, Tampa, FL, United States, Aurelian Hopulele - Gligor, Freelance Software Developer, Cluj Napoca, Romania, Laura Connor, University of South Florida, Tampa, FL, United States, Charles Connor, University of South Florida, School of Geosciences, Tampa, FL, United States, Costanza Bonnadona, University of Geneva, Geneva, Switzerland, Alain Volentik, ExxonMobil, Houston, TX, United States, Sylvain J Charbonnier, University of South Florida, Geosciences, Tampa, FL, United States and Jan Marie Lindsay, The University of Auckland, Auckland, New Zealand