Noun: tufa too-fu
- A soft porous rock consisting of calcium carbonate deposited from springs rich in lime
"Calc-tufa formations can be seen in many limestone caves";
- calc-tufa
- Hard volcanic rock composed of compacted volcanic ash
"The ancient buildings were constructed from blocks of tufa";
- tuff
Derived forms: tufas
Type of: rock, stone, volcanic rock
Encyclopedia: Tufa