A light, porous rock formed by consolidation of volcanic ash.
More example sentences
- Among the 30 different types of stone recognized are varieties of diorite, granite, bedded tuff, sandstones, limestones, and tufa.
- Lenses incorporate varicoloured tuffaceous cherts intercalated with tuffaccous mudstone and tuff.
- The lower series consists of alternating basalt lava, tuff breccia, tufite, and siliceous rock, whereas the upper one is dominated by diabase.
- More example sentences
- Further up section the geology is dominated by a succession of unmetamorphosed but strongly fractured and veined blocky andesites, basalts and tuffaceous rocks.
- In addition, there are tuffaceous (volcanic ash) layers at various horizons throughout the Green River Formation.
- Built of uniformly gray, granular volcanic tufa, or peperino, the courtyard was completed by 1579, as recorded in the building documents.
Definition of tuff in:
- The US English dictionary