Phonolites are vesicular and pumiceous in nature, although phonolites with trachytic texture are also present.
2.
The petrologically similar lavas show evidence of a differentiation by flow and gravity and have trachytic textures.
3.
Andesite at Slag Hill consists of 70 % dark brown volcanic glass with varied degrees of trachytic texture in the plagioclastic matrix and less than 5 % of the andesite comprises vesicular textures.
मोबाइल