trachytic texture
trachytic texture General petrographic term applied to volcanic rocks that have a fine mat of orientated feldspar laths, suggestive of flow. See TRACHYTOIDAL.
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foliation , foliation A continuous, sub-planar rock fabric formed by the preferred orientation of minerals with a generally platy or tabular habit. The layers ar… Hjulstrom Effect , Hjulström effect The contrast between the flow velocity at which a fine-grained cohesive sediment, may be deposited and that at which it will be erod… Hypopycnal Flow , hypopycnal flow Bankfull Flow , bankfull flow Trachyte , trachyte Fine-grained volcanic rock of the alkaline series of intermediate rocks. Trachyte is the volcanic equivalent of syenite.
trachyte gritty vol… Aphanitic , Aphanitic
Crystalline rocks with mineral grains that cannot be distinguished from one another without magnification have an aphanitic igneous texture…
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trachytic texture