******************************************************** From: John Smellie <JLSM@xxxxxxxxx> ******************************************************** Dear Colleagues, We invite you to participate in our upcoming Special Session at the 2008 General Assembly of IAVCEI in August, titled "Glaciovolcanism (session 3b)" (see description below). We had an exceptionally good response to our call for contributions and it promises to be an important event for all with an interest in glaciovolcanism. We urge you to come along and join in the lively discussion that it will doubtless promote. We look forward to seeing you there. Best wishes from the convenors, John Smellie, Dave McGarvie, Magnus Gudmundsson and Jennie Gilbert. _______________________________________________________________ Session 3b: Glaciovolcanism Conveners: J.L. Smellie, British Antarctic Survey, jlsm@xxxxxxxxx D.W. McGarvie, The Open University, d.mcgarvie@xxxxxxxxxx M.T. Gudmundsson, Institute of Earth Sciences, University of Iceland, mtg@xxxxxxxxxxxxx J.S. Gilbert, Lancaster University, j.s.gilbert@xxxxxxxxxxxxxxx Glaciovolcanism is distinct from subaqueous volcanism because of the various forms of interaction between ice and magma. Ice often confines the eruptive products and a proportion of the meltwater. Rapid heat transfer from magma to ice causes large scale melting leading to jokulhlaups and lahars that can be a major hazard in volcanic areas with ice-covered volcanoes. These various interactions between magma and ice result in added complexity and the opportunity for the construction of distinctive landforms. During past glacial periods many volcanic areas were heavily glaciated and interaction of magma and ice was much more widespread than at present. In many areas glaciovolcanism provides the only physical record of the thickness of ancient land-based ice sheets. This session will focus on: - Glaciovolcanic landforms and the way in which these relate to the properties of magma and ice (e.g. magma rheology, eruption rate, ice hydrology, ice rheology and glacier dynamics). - Observations of volcano-ice interaction. - Hazards from glaciovolcanic eruptions. - The physics of glaciovolcanic eruptions: Experimental and theoretical investigations. - Links between glaciovolcanism and climate. - Studies of ancient glaciovolcanic products, diagnostic criteria for palaeoeruption environments. - Microbial activity in glaciovolcanic environments (e.g. subglacial lakes, alteration of glass). - Palaeoenvironmentally-diagnostic proxies in glaciovolcanic sequences (e.g. stable isotope studies; volatile contents). - Hydraulics of glaciovolcanic outburst floods. Commission: Volcano - Ice Interactions ============================================================== To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxxx To contribute to the volcano list, send your message to: volcano@xxxxxxxx Please do not send attachments. ==============================================================
