HR: 12:05h
AN: V12B-08 INVITED     [Abstracts]
TI: Lava-ice interaction: A database describing characteristics and known examples
AU: * Lescinsky, D T
EM: dlescins@uwo.ca
AF: University of Western Ontario, Department of Earth Sciences, London, ON N6A 5B7 Canada
AB: The identification of past lava-ice interaction is accomplished using specific features, such as: 1) the presence of fractures that indicate of rapid cooling, the penetration of water, and/or the presence of non-horizontal cooling surfaces; and 2) unusually great lava flow thicknesses that show confinement or ponding against now non-existent walls (implied to have been glacial walls). In addition to helping reconstruct the physical parameters during specific volcanic events, the recognition of lava-ice interaction provides important information regarding the climate and local environment at the time of eruption. To aid in the identification of lava-ice interaction and paleoclimatological studies, a comprehensive database has been created of examples from around the world. The examples of lava-ice interaction come from publications of field studies, personal observations and personal communications. This database includes descriptions, photos, detailed locations, lava compositions and ages as available and will be available on the World Wide Web. The database currently contains over 200 examples of lava-ice interaction, representing more than 125 volcanoes. Lava-ice interaction examples range from subglacial to englacial to emergent and include eruptions associated with both ice sheets and valley glaciers. The database also includes descriptions and photos from more than 17 historic volcanic eruptions that experienced lava and ice interaction.
DE: 8425 Effusive volcanism
DE: 8427 Subaqueous volcanism
DE: 8429 Lava rheology and morphology
DE: 8486 Field relationships (1090, 3690)
SC: Volcanology, Geochemistry, Petrology [V]
MN: Fall Meeting 2005