pumice
noun
a porous or spongy form of volcanic glass, used as an abrasive.
pumiceous
-
a word derived from
pumice.
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.
Basaltic lavas are frequently spongy or pumiceous, especially near their surfaces; and, in course of time, the steam cavities become filled with secondary minerals such as calcite, chlorite and zeolites.
From Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" by Various
All the upper part of the mountain is composed of a pumiceous tufa, rich in sanidine and of a characteristic greenish colour.
From A Study of Recent Earthquakes by Charles Davison
These beds are covered by others of a peculiar soft white stone, including much gypsum, and resembling chalk, but really of a pumiceous nature.
From The Voyage of the Beagle by Charles Darwin
Half way up was a square enclosure of some greyish stone, which I found subsequently was built partly of coral and partly of pumiceous lava.
From The Island of Doctor Moreau by H. G. (Herbert George) Wells
Portions, therefore, of this lava were either thrown 383 out by explosions, or torn off by the waves, during the deposition of the pumiceous strata beneath the sea.
From Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology by Sir Charles Lyell
