noun
- plural of calctufa; porous, lightweight rock formed by the precipitation of calcium carbonate from water, often found near hot springs or limestone regions
Usage: geological term; also spelled 'calcareous tufa' or 'tufa'
Examples
- The geologist examined the calctufas deposited around the mineral spring.
- Calctufas form slowly as mineral-rich water evaporates and leaves behind calcium deposits.
- The ancient Roman aqueducts were sometimes lined with calctufas to prevent water loss.
- These calctufas are prized by builders for their insulating properties.