Page 16 - Volcanic Textures A Guide To The Interpretation of Textures In Volcanic Rocks

naming scheme should be adapted to suit the aims and In naming coherent volcanic deposits, the emphasis in
scale of the textural analysis, the range of compositional available classifications is on chemical composition
variation present, and the state of preservation of the which, of course, can only be roughly guessed in the
volcanic sequence. field. In most cases, it is possible to distinguish
mappable units, so long as the terminology is used con-

Fig. 2 Characteristics of coherent and autoclastic facies of lavas and syn-volcanic intrusions (Part 3).
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