**************************************************************** From: Harry Pinkerton <h.pinkerton@xxxxxxxxxxxxxxx> **************************************************************** As most readers will know, the 2008 IAVCEI General Assembly is to be held in Reykjavik, Iceland, from 18th to 25th of August. The main theme of the meeting will be "Understanding Volcanoes". For those with interests in lava flows and domes, there are a number of sessions of interest, one of which is on 'Lavas and domes: Rheology, structures and emplacement dynamics' This session will focus on: - Detailed field and/or remote sensing observations of processes during the emplacement of active or inactive flows or domes (and differences arising from emplacement in subaerial or subaqueous conditions) - Field measurements of flows or domes during emplacement, including the usefulness of new techniques - Flow and dome simulations in the laboratory - Mathematical modelling of flows or domes - Laboratory measurements of key properties of lava that affect flow behaviour Presentations that cover more than one of these areas are particularly welcome. Background information: Lava flows and domes have a range of dimensions and structures, and one of our challenges is to understand the factors responsible for their formation. Flows and domes that are emplaced during single pulses of magma are generally less complex, structurally, than those emplaced over long time-periods at variable effusion rates. Factors that control the flow behaviour and morphology of flows and domes include: the rheological properties of magma on eruption from the vent and how this changes during emplacement as a consequence of cooling both by heat transfer and undercooling by gas loss; effusion rate and how this changes during eruption; eruption duration; environmental factors during eruption (including emplacement in contact with snow, ice or water); pre-existing topography (particularly river valleys that capture flows) and gravitational instabilities at the margins of flows (e.g. as they encounter very steep slopes) or domes. For details of the IAVCEI meeting, field excursion, deadlines etc., please see links from http://www.iavcei2008.hi.is/page/I08-intro . If you require any additional information on the lava flow and dome part of the programme, please contact one of the convenors of this session. They are: Harry Pinkerton, Lancaster University, h.pinkerton@xxxxxxxxxxxxxxx Katharine V. Cashman, Univ. of Oregon, cashman@xxxxxxxxxxx Gordon E. Grant, USDA Forest Service, Gordon.Grant@xxxxxxxxxxxxxxx and Armann Höskuldsson, University of Iceland, armh@xxxxx ============================================================== 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. ==============================================================
