calc-tufa

Definitions

Examples

• These are chambers excavated in the tufa on either side of the galleries, with which they communicate by doors, as seen in Fig. 4.

• For the same reason the different piani were generally separated by a thick stratum of solid tufa.

• At B will be observed the employment of masonry to strengthen the crumbling walls of the friable tufa.

• The tufa granolare, on the contrary, was admirably adapted for the construction of these subterranean cemeteries.

• The most ancient and lowest stratum of this igneous formation is a compact conglomerate known as tufa lithoide.