tuff

IPA: tˈʌf

(petrology) A light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.
A surname.

Examples of "tuff" in Sentences

Its remains are on a tuff butte.
The tuff also appears to be layered.
In the north west is purple and green tuff.
Conflicting opposition is tuff to respond to.
A search for somthing nonexistent is a tuff issue.
There is a question as to whether it is tuff either.
It is built of stone and tuff, with plastered facades.
The cliff is Tertiary period tuff and tuff breccia of volcanic origin.
The Himmeldunkberg comprises mainly of the volcanic rocks basalt and tuff.
This tuff, lapilli tuff and breccia outcrops a little to the west of the summit.