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This has included the identification of newly-discovered mass flow deposits offshore Montserrat from marine sediment cores, improving the understanding of the dynamics, frequency and triggers of hazardous volcanic island landslides.
I am also focussing on developing quantitative methods to detect tephra in marine sediment cores and to help distinguish primary eruption tephras from reworked volcanic material with image analysis. These methods will advance the manner in which volcanic records are constructed from marine sediment cores applicable across all settings.
During my PhD, I was involved in a five-week research cruise on board RRS Discovery to assess the biological response to volcanic ash input into the North Atlantic Ocean from the Eyjafjallajökull volcano. This cruise led to interesting results about the role of ocean iron fertilisation in the removal of carbon from the atmosphere.
A current project in Southampton aims to understand the how volcanic landslides affect the frequency, style and composition of subsequent volcanic activity.
Publications:
Cassidy, M., Watt, S.F.L., Talling, P.J., Palmer, M.R., Edmonds M., Jutzeler, M., Wall-Palmer, D., Coussens, M., Gernon, T., Manga, M., Taylor, R.N., Michalik, A., Inglis, E., Breitkreuz, C., Boudon, G., McCanta, M.C., Adachi, T., Hornbach, M.J., Colas, S.L., Endo, D., Fujinawa, A., Kataoka, K.S., Maeno, F., Tamura, Y., Wang, F., Ishizuka, O., Le Friant, A., and Shipboard Science Party ' Magmatism following unloading by volcanic edifice collapse is mafic, deep and rapid' Geophysical Research Letters (in review)
Cassidy, M., Watt, S.F.L., Palmer, M.R., Trofimovs, J., Symons, W., Maclaren, S., Stinton, A. (2014) ‘Construction of volcanic records from marine sediment cores: A review and case study (Montserrat, West Indies)’. Earth Science Reviews. 138, 137-155pp. DOI: 10.1016/j.earscirev.2014.08.008
Wall-Palmer, D., Coussens, M., Talling, P., Jutzeler, M., Cassidy, M., Marchant , I., Palmer M., Watt, S.F.L., Smart, C., Fisher. J., Hart, M., Fraas, A., Trofimovs, J., Le Friant, A., Ishizuka, O., Adachi, T., Aljahdali, M., Boudon, G., Breitkreuz, C., Endo, D., Fujinawa, A., Hatfield, R., Kataoka, K., Lafuerza, S, Maneo, M., Martinez-Colon, M., McCanta, M., Morgan, S., Saito, T., Slagle, A., Stinton, A., Konduri, S., Tamura, Y., Villemant, B., Wang, F., 'Late Pleistocene stratigraphy of IODP Site U1396 and compiled chronology offshore of south and south west Montserrat, Lesser Antilles'. Geochem. Geophys. Geosyst. DOI:10.1002/2014GC005402
Cassidy, M., Trofimovs, J., Watt, S.F.L., Palmer, M.R., Taylor, R.N., Gernon, T.M., Talling, P.J., Le Friant, A. ‘Multi-stage collapse events in the South Soufrière Hills, Montserrat, as recorded in marine sediment cores’ (2014), In: Wadge, G., Robertson, R., Voight, B., (eds) The eruption of Soufrière Hills volcano, Montserrat from 2000 to 2010, Memoir of the Geological Society, London
Trofimovs, J., Talling, P.J., Fisher, J.K., Hart, M.B., Sparks, R.S.J., Watt, S.F.L., Cassidy, M., Le Friant, A., Moreton, S.G., Leng, M.J., Smart, C., (2013) ‘Timing, origin, and emplacement dynamics of mass flows offshore SE Montserrat in the last 110 ka: implications for landslide and tsunami hazards, eruption history, and volcanic island evolution.’ Geochem. Geophys. Geosyst. doi: 10.1002/ggge.20052
Cassidy, M., Trofimovs, J., Palmer, M.R., Talling, P.J., Watt, S.F.L., Moreton, S., Taylor, R.N. (2013) ‘Timing and emplacement dynamics of newly recognised mass flow deposits at ~8-12 ka offshore Soufrière Hillsvolcano, Montserrat: how submarine stratigraphy can complement subaerial eruption histories’ Journal of Volcanology and Geothermal Research, 1-14 10.1016/j.jvolgeores.2012.12.002
Achterberg, E.P., Moore, M.C., Henson, S.A., Steigenberger, S., Stohl, A., Eckhardt. S., Cassidy, M., Hembury D., Klar, J., Lucas, M.I., Marsay, C.M., Ryan-Keogh, T.J., (2013) Naturaliron fertilisation by the Eyjafjallajökull volcanic eruption. Geophysical Research Letters 40, 1–6, doi:10.1002/grl.50221
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