Volcanic Successions Modern and Ancient: A Geological Approach to Processes, Products and Successions
from volcanological and sedimentological perspec The idea for this book carne into being between 1981 and 1982 when J. V. W. came to Monash tives. One of our aims in the book is to provide geologists with a sound basis for making their own University to take up a Monash Postdoctoral Fellowship. During this period a short course on well founded interpretations. For that reason we facies analysis in modern and ancient successions cover not only concepts about processes, and the was put together, integrating J. V. W. 's extensive nature of the products, but also methods and volcanological experience in numerous modern approaches that may be useful in analysing both modern and ancient successions. Most importantly, volcanic terrains with R. A. F. C. 's extensive sedi mentological and volcanological experience in we treat the diversity of products in volcanic older volcanic and associated sedimentary succes terrains as facies, and we use the method of facies sions in the Palaeozoic and Precambrian of analysis and interpretation as a means of construct Australia. The enthusiastic response from the ing facies models for different volcanic settings. participants to the first short course, taught in May These models will, we hope, be useful as norms 1982, and to subsequent annual re-runs, encour for comparison for workers in ancient terrains. aged us to develop the short course notes into this The only publication which overlaps with this one book.
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activity air-fall associated basaltic base block breccias caldera Chapter characteristics clasts collapse common concentration cones contain crystals debris density described developed discussed dispersal distance effects epiclastic erosion eruption column et al example explosive facies fall deposits field Figure flow units fluid fluidisation formation fragments G. P. L. Walker grading grain grainsize ground height ignimbrite important increase indicate initial komatiites lake lateral lava layer lithics lower magma mass massive material maximum moving observed occur origin particles phase plinian pressure processes produced pumice pumice flows pyroclastic flow pyroclastic flow deposits relatively result rhyolite rock scoria sediment settings significant sorting Sparks structures studies subaqueous successions suggested surface surge surge deposits Taupo temperature term thickness transport tuff turbulent types upper velocity vent viscosity volcanic volcaniclastic volume welded Wilson Wright zone