from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of the nature or texture of tufa.
from the GNU version of the Collaborative International Dictionary of English
- adj. Pertaining to tufa; consisting of, or resembling, tufa.
from The Century Dictionary and Cyclopedia
- Made up of tufa, or resembling it in a greater or less degree.
When these deposits occur in a flat tufaceous country like the present, a large space is devoid of vegetation, on account of the nitrates dissolving the tufa, and keeping it in a state unfavorable to the growth of plants.
I brought away specimens of one of the tufaceous layers of a pinkish colour and it is a most extraordinary fact that Professor
The secondary formation is represented by a fine limestone, in some places almost fit for the purposes of lithography, and a coarse gypsum often of a tufaceous nature.
In many places were signs of water: lines of basalt here and there seamed the surface, and wide sheets of the tufaceous gypsum called by the Arabs Sabkhah shone like mirrors set in the russet framework of the flat.
The vast quantity of this unworked fuel would be sufficient to warm the whole population of Iceland for a century; this vast turbary measured in certain ravines had in many places a depth of seventy feet, and presented layers of carbonized remains of vegetation alternating with thinner layers of tufaceous pumice.
I brought away specimens of one of the tufaceous layers of a pinkish colour and it is a most extraordinary fact, that Professor Ehrenberg5 finds it almost wholly composed of matter which has been organized: he detects in it some siliceous-shielded fresh-water infusoria, and no less than twenty-five different kinds of the siliceous tissue of plants, chiefly of grasses.
The lava flowed until it reached a nearly perpendicular precipice at the head of the valley of Calanna, over which it fell in a cascade, and being hardened by its descent, it was forced against the sides of the tufaceous rock at the bottom, so as to produce an extraordinary amount of abrasion, accompanied by clouds of dust worn off by the friction.
On the slopes going up toward the lake the streams have cut precipitous cañons a thousand feet deep in this whitish tufaceous material.
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.
At Jilmeca and some other points along the day's route the rock over which we passed was a white tufaceous material loaded with streaks of black flint.
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