Felsite Definition

Felsite Sentence Examples

• These are penetrated by intrusions of granitic and felsitic character; one of these masses in Papa Stour is a handsome pink felsite.

• Igneous rocks are not extensively developed; in Wales they form an important feature and occur in considerable thickness; they are represented by lavas of olivine-diabase and by contemporaneous tuffs which are traversed by later granite and quartz felsite.

• Tertiary-aged dolerite and felsite dikes occur throughout the area and have a strike of NW-SE.

• The orthoschists are white mica-schists produced by the shearing of acid rocks, such as felsite and porphyry.

• In the south of the island there are sills and dykes of felsite, quartz-porphyry, rhyolite, trachyte and pitchstone.