noun
- plural of tuff; rocks formed from volcanic ash that has been compressed and hardened
Usage: geology
Examples
- The geologist collected samples of tuffs from the ancient volcanic site.
- These tuffs were formed millions of years ago during massive eruptions.
- The canyon walls revealed layers of colorful tuffs and other sedimentary rocks.
- Tuffs are often softer than other volcanic rocks and erode more easily.
- The building stones were cut from local tuffs quarried nearby.
- Scientists studied the tuffs to understand the region’s volcanic history.