Sentence Examples with the word Phonolite

Staffordshire, the diorites of Warwickshire, the phonolite of the Wolf Rock (to which he first directed attention), the pitchstones of Arran and the altered igneous rocks near the Land's End were investigated and described by him during the years1869-1879in the Quarterly Journal of the Geological Society and in the Geological Magazine.

West of the volcanic region, nearer to Lake Victoria and the Eastern province, ironstone, granite, gneiss and schistose formations predominate, with phonolite in places.

Of the Sauerbrunnen lies the Bofen or Biliner Stein (1763 ft.), a large mass of phonolite or clinkstone, with rare flora and fine view.