F4E1L1S1I1T1E1
10 points
FELSITE is validvalid
an igneous rock [n FELSITES]
a fine-grained rock consisting essentially of orthoclase feldspar with occasional grains of quartz, also FELSTONE [n -S]
an igneous rock [n FELSITES]
a fine-grained rock consisting essentially of orthoclase feldspar with occasional grains of quartz, also FELSTONE [n -S]