ELSEVIER Journal of Volcanology and Geothermal Research 70 (1996) 265 Contents Volume 70, 1996 Research Papers The geochemistry of ashes from Vesterisbanken Seamount, Greenland Basin: implications for the evolution of an alkaline volcano K.M. Haase, M. Hartmann and H.-J. Wallrabe-Adams The internal structure of lava flows— insights from AMS measurements I: Near-vent a’a E. Cafién-Tapia, G.P.L. Walker and E. Herrero-Bervera Magma dynamics beneath Kameni volcano, Thera, Greece, as revealed by crystal size and shape measurements M.D. Higgins The caldera-forming eruption of Ksudach volcano about cal. A.D. 240: the greatest explosive event of our era in Kamchatka, Russia O.A. Braitseva, 1.V. Melekestsev, V.V. Ponomareva and V.Yu. Kirianov On the self-organized critical state of Vesuvio volcano G. Luongo, A. Mazzarella and A. Palumbo Computer-assisted image analysis on clast shape fabric from the Orvieto—Bagnoregio ignimbrite (Vulsini District, central Italy): implications on the emplacement mechanisms B. Capaccioni and D. Sarocchi A subaqueous welded tuff from the Ordovician of County Waterford, Ireland W.J. Fritz and C.J. Stillman The Kizilkaya ignimbrite — an unusual low-aspect-ratio ignimbrite from Cappadocia, central Turkey R. Schumacher and U. Mues-Schumacher Internal structure of Piton de la Fournaise volcano from seismic wave propagation and earthquake distribution A. Nercessian, A. Hirn, J.-C. Lépine and M. Sapin Stress, failure and fluid flow deduced from earthquakes accompanying eruptions at Piton de la Fournaise volcano M. Sapin, A. Hirn, J.-C. Lépine and A. Nercessian Experiments on gas—ash separation processes in volcanic umbrella plumes R.E. Holasek, A.W. Woods and S. Seif Volcanic complexes in the eastern ridge of the Canary Islands: the Miocene activity of the island of Fuerteventura E. Ancochea, J.L. Brandle, C.R. Cubas, F. Hernan and M.J. Huertas Chaos and stochasticity in volcanic eruptions the case of Mount Etna and Vesuvius W. Marzocchi Separation of intrinsic and scattering Q for volcanic areas: a comparison between Ema and Campi Flegrei E. Del Pezzo, M. Simini and J.M. Ibafiez Evidence for gas influence on volcanic seismic signals recorded at Stromboli M. Ripepe Organic matter in the Soultz HDR granitic thermal exchanger (France): natural tracer of fluid circulations between the basement and its sedimentary cover B. Ledésert, J. Joffre, A.A mblés, P. Sardini, A. Genter and A. Meunier Discussion Comment on **Age and cooling history of the Manaslu granite: implications for Himalayan tectonics’’ by Copeland et al. I.M. Villa Reply to the Comment on **Age and cooling history of the Manaslu granite: implications for Himalayan tectonics’ by Igor Villa P. Copeland, T.M. Harrison and P. Le Fort Contents Volume