Chambers excavated in volcanic ashes by Indians for habitations .
The whole mountain was enveloped in clouds of volcanic ashes and vapors.
When most volcanic ashes and lava have been exposed for some time to the atmosphere they make a very fertile soil.
From the dark cloud immense quantities of red hot stones, pumice, and volcanic ashes descended on the earth.
Evidently the only things thrown out from them have been gases, volcanic ashes, and lapilli.
For more than a year a thick cloud of smoke and volcanic ashes covered the whole of Iceland, and nearly darkened the sunlight.
At Tadoussac, a shower of volcanic ashes descended upon the rivers, agitating the waters like a tempest.
In the year 472, says Procopius, all Europe was covered more or less with volcanic ashes.
Volcanic ashes, used in cement, especially if required under water.
At Rome lime and volcanic ashes (lapis Puteolnus) were used with pieces of stone as large or larger than the fist.