and Quaternary volcanism in the Massif Central, France 517 KOGARKO, L. N. Alkaline rocks of the eastern...transitional basalts, and these typically form major volcano complexes and have associated felsic magmas. Such...geology, petrology and geochemistry of Caldeira volcano, Graciosa, Azores, and its bearing on contemporaneous...(unpublished). - - , J. G. & BAILEY, D. K. 1982. Caldeira volcano, Graciosa, Azores: Progress Report. J. geol. Soc...Province) c + 4.3 to + 34.1 0.056-1.28 Fiji - 13.4 -France (Massif Central) - 14.2 to 0 0.153-1.225 French
mainly consisting of intermediate plagioclase + augite + opaques’) into an informative, appropriate name...Mineralogical Society of America (Fig. 6.6), Montserrat Volcano Observatory (Fig. 7.4a and the front cover image)...previously erupted products the hazard presented by a volcano to surrounding communities; • investigating magma...chamber that originally lay 5 km below an active volcano (but whose contents – or erupted products – are...minerals – such as quartz, olivine, nepheline, aegirine–augite – provides immediate, key clues about the melt’s