Meanings of volcanic forces in English

Hills were low and sparse, and usually displayed signs of volcanic forces.

But to-night volcanic forces in Roy were rising like champagne when the cork begins to move.

And what can have been the cause of this furious outbreak of volcanic forces on the moon?

The invasion of a region by volcanic forces is attended by movements of the crust heralded by earthquakes.

But for some reason the volcanic forces within this mountain, which has been called Mazama, awoke to renewed action.

Not the least remarkable among the phenomena produced by volcanic forces, are the strange underground noises which are occasionally heard.

It looks as if the volcanic forces, content with rending the mountain top in twain, had then passed into an endless repose.

The Indians approach it under the fear of a superstition originating in the volcanic forces surrounding it, which amounts almost to entire exclusion.

Jets of steam issue from the sides of the cañon at frequent intervals, marking the presence of thermal springs and active volcanic forces.

The bases of the cliffs are very rocky; and the curious wrinklings and corrugations of the coast suggest the work of ancient volcanic forces.