Coming now to Ice Springs Craters in Utah, we find here three small craters formed of scoriae and lapilli (volcanic ashes consisting of small angular stony fragments).
Jorullo's plantation was covered by an especially fertile soil, since it was formed by the deposits of volcanic ashes, dust, tufa, etc.
The largest of these fragments are called cinders; the finer particles volcanic dust; while most of those of intermediate particles are known among other things as volcanic ashes.
In such cases the largest fragments form what are called volcanic cinders, the smaller pieces, volcanic ashes, and the extremely small particles, volcanic dust.
There is no difficulty in conceiving that the pumiceous mud, if so thrown out, may have set into a kind of stone on drying, just as some cements, composed of volcanic ashes, are known to consolidate with facility.
Volcanic ashes, largely used as mortar for buildings, similar in nature to what is called in this country Roman cement.
For eleven feet above their bases these columns are uninjured, for to this height they were protected by an accumulation of volcanic ashes; but from eleven to nineteen feet they are closely pitted with the holes of boring marine mollusks.
The finer particles into--which the lava is exploded are called volcanic dust or volcanic ashes, and are often carried long distances by the wind before they settle to the earth.
Pliny the younger, his description of the great eruption of Mount Vesuvius, and the phenomenon of volcanic ashes, 235.
Both these islands appear to be similarly formed of successive strata of volcanic ashes, which, being of the most vivid and variegated colors, present a striking contrast to the black and cindery aspect of the central isles.
All deposition, therefore, except in the case of a shower of volcanic ashes, is the sign of superficial waste going on contemporaneously, and to an equal amount elsewhere.
Even without the aid of organic remains we might have decided that the deposit was newer than the chalk, for chalk- flints containing cretaceous fossils were detected by the duke in the principal mass of volcanic ashes or tuff.
It is worthy of remark that, when it occurs under the form of trappean tuff (volcanic ashes of De la Beche), as in the crest of Snowdon, the peculiar species which distinguish it from the Llandeilo beds are still observable.
Its usually snow-clad summit became covered in a short time with a thick layer of volcanic ashes, which greatly altered its appearance.
The whole island was strown with volcanic ashes, which, where they did not smother the grass outright, gave it a poisonous taint.
So great was the drift of volcanic ashes, that boats could hardly struggle through the water, and multitudes of dead fishes floated on its surface.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "volcanic ashes" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
