American Heritage Dictionary of the English Language, 5th Edition
Tufa Sentence Examples
Ten shafts lined with slabs of tufa which were there found may have been the approaches to tombs or may have served as wells.
Calcareous tufa or travertine occurs in the valley of Matlock and elsewhere, and in some places is still being deposited by springs.
Catacomb of benches cut out of the tufa rock.
The igneous formation of which the greater part of the Roman Campagna is, in its superior portion, composed, contains three strata known under the common name of tufa, - the " stony," " granular," and " sandy " tufa, - the last being commonly known as pozzolana.
The stony tufa (tufa litoide) is quarried as building-stone.