Economic and Environmental Geology

Fig. 4.

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Fig. 4. Photographs of the welded lapilli tuff. (a) Clast-supported, coarse-grained lowermost part of the welded lapilli tuff. (b) Closeup view of the lowermost part of the welded lapilli tuff. This part is composed of angular lithic lapilli locally showing a jigsaw-fit texture (arrows). (c) Poorly sorted, massive middle part of the welded lapilli tuff. (d) Microphotographs of welded lapilli tuff. Note a welded texture determied by warped, fine-grained matrix (arrows) (Lfs: lithic fragments, Pl: plagioclase). (e) Coated ash pellets consisting of massive core and single, concentric rim in the upper part of the welded lapilli tuff. (f) Accretional lapilli (arrow) composed of massive core and multiple concentric rims surrounding the core exposed in the topmost part of the welded lapilli tuff.
Econ. Environ. Geol. 2022;55:295-307 https://doi.org/10.9719/EEG.2022.55.3.295
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