felsite
felsite · felsites
A fine grained volcanic extrusive rock, generally light in color, composed of felsic…A fine grained volcanic extrusive rock, generally light in color, composed of felsic minerals.
Meaning
2 sensesA fine grained volcanic extrusive rock, generally light in color, composed of felsic minerals.
The buff-colored dacites of the Superstition Mountains are felsites.
Any light-colored volcanic rock whose true mineralogy is not yet determined.