This rule does not apply to craters composed of lava and scoriae.

They remain thirty or forty years without emitting scoriae, ashes, or even vapours.

You walk over blackish scoriae encrusted with brazen bolts and particles of melted glass.

The solid matter thrown out by volcanoes consists of lapilli, scoriae, dust and bombs.

We ascended the Piton by grasping these half-decomposed scoriae, which often broke in our hands.

The column of cinders, of scoriae, of broken rocks and earth, had wholly ceased to ascend.

In a bed of scoriae several acres in extent, at Old Land Farm in Maresfield, the Rev.

There should be mountains of scoriae, the dross and relics of our abandoned sins, around us all.

Now, the part of ejected scoriae and ashes seemed to my mind a very rough one to act.

The path coiled down abruptly into a narrow ravine between two tumbled and knotty masses of blackish scoriae.

Along these fissures, in a few days, scoriae cones appeared; on one occasion no less than thirty-six in number.

Hence the numerous heaps of scoriae found in the neighbourhood of Leeds,-atMiddleton, Whitkirk, and Horsforth-allwithin the borough.

Occasionally a part of the wall might even go black, into pock-marked scoriae or into brilliant planes of obsidian.

Its entrails are strewn about; nearly the entire surface of the ground is covered with cinder-heaps and mounds of scoriae.

But now the clear flow of pure metal into the moulds was secured, while the scoriae were mechanically held back.

Myriads of tons of ashes, cinders, pumice and scoriae, hurled from the crater, fell in every section of the island.