tufas

Stalactites and tufas, the long, distorted columns of hardened calcium carbonate that bulge from the cliff walls in shapes looking like elephants 'trunks or a tree's limbs, are a big draw for visiting climbers.

To Climbers, Greek Island Rocks 2009

It's possible that tufs/tufas were in general use, but then why would Bede make a point to mention it?

Paths of Exile - now available Carla 2007

Mororan to Sarufuto there are everywhere traces of new and old volcanic action — pumice, tufas, conglomerates, and occasional beds of hard basalt, all covered with recent pumice, which, from

Unbeaten Tracks in Japan Isabella Lucy 2004

Campania, red and black tufas; in Umbria, Picenum, and Venetia, white tufa which can be cut with a toothed saw, like wood.

The Ten Books on Architecture Vitruvius Pollio

Any mass of igneous matter, that might determine the further rupture of a collateral fissure, would result in the conduction of any changes of pressure or vibrations, along the column of highly elastic trachyte; whilst the same earth-waves would be annulled or absorbed by the inelastic tufas surrounding it, so that the blow would be struck perpendicularly to the surface, and in a small area with well defined limits.

A Study of Recent Earthquakes Charles Davison 1899

Lacco and Casamicciola, this tufa is seen reaching down to the sea; but, in all other parts, it is covered by streams of trachitic lava, by more recent tufas, or by a deposit of marly appearance, which is regarded by Fuchs as resulting from the decomposition of the Epomean tufa.

A Study of Recent Earthquakes Charles Davison 1899

About this time, Epomeo seems to have originated in eruptions occurring in a sea at least 1,700 feet in depth -- eruptions that preceded the formation of Monte Somma and were either contemporaneous or alternating with those that gave rise to the oldest trachitic tufas of the Phlegræan Fields.

A Study of Recent Earthquakes Charles Davison 1899

Most of the land, resulting from the decomposition of the tufas, is of extreme fertility; and, therefore, we find on the

The Naturalist in Nicaragua Thomas Belt 1855

For scores of miles every rock is trachytic, and the earth decomposing tufas.

The Naturalist in Nicaragua Thomas Belt 1855

Whilst the country to the north-east of the lakes is mostly composed of rocks, of great age, geologically, such as schists, quartzites, and old dolerytic rocks, with newer but still ancient trachytes, that to the south-west of them is formed principally of recent volcanic tufas and lavas, the irruption of which has not yet ceased.

The Naturalist in Nicaragua Thomas Belt 1855