Dear Colleagues, I should like to draw your attention to the forthcoming Bicentennial Conference of the London Geological Society, and in particular to invite you to submit a contribution to the poster session on Mid-Ocean Ridges which I am convening. The conference will be held at the Queen Elizabeth II conference centre, opposite Westminster Abbey, on 10-12 September 2007, and will feature a host of invited talks by international leaders in their fields. The aim is to present the range of exciting present-day achievements and ongoing work in the Earth sciences under four concurrent themes. One of these, Earth and Planetary Interiors, will be linked to the mid-ocean ridge poster session and will included an invited talk by Joe Cann on “Rapid formation of ocean lithosphere through complex integration of igneous, hydrothermal and tectonic processes”. Please see the conference announcement and draft programme at http://www.geolsoc.org.uk/gsl/society/bicentenary/bicentenaryconference for further details. Abstract submission (deadline 15 June) and meeting registration (deadline for low-cost registration is 31 May) can be completed via the same website. Please forward this information to any relevant colleagues, and accept my apologies for multiple mailings. Roger Searle Department of Earth Sciences, Durham University, [log in to unmask]