tufa
noun
a porous limestone formed from calcium carbonate deposited by springs or the like.
tufaceous
-
a word derived from
tufa.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Both men and women braid palm, and in every yard there is excavated in the soft, tufaceous rock, a cueva, or cave, in which they work.
From In Indian Mexico (1908) by Frederick Starr
The tufaceous stratum on which this feldspathic lava rests is much hardened, stained purple, and has a spherico-concretionary structure; it here contains a good many pebbles of claystone porphyry.
From Geological Observations on South America by Charles Darwin
The limestone chiefly consists of an irregular assemblage of angular fragments united by a tufaceous cement.
From Old Mackinaw The Fortress of the Lakes and its Surroundings by W. P. (William Peter) Strickland
It seems to have been embedded in some reddish tufaceous matter; and may have been transported either by the aborigines or by natural means.
From Volcanic Islands by Charles Darwin
Puzzuoli itself stands chiefly on a promontory of the older tufaceous formation, which cuts off the new deposit, although I detected a small patch of the latter in a garden under the town.
From Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology by Sir Charles Lyell
