The heat in the sun was oppressive on those volcanic rocks.

The stoves use heat-holding volcanic rocks broken down to the size of charcoal.

Sometimes there was a little coralline limestone, but no volcanic rocks.

The larger, darker forms are dunes made of dust from dark volcanic rocks.

The Catoctin schist is geographically the most important of the volcanic rocks of Loudoun.

Here I saw for the first and only time, in this peninsula, volcanic rocks.

They said the volcanic rocks stretched "to the horizon on all sides".

The clatter of jagged volcanic rocks announced Leoman's approach.

When magmas reach the surface red hot, they form extrusive rocks, such as volcanic rocks.

Some past beers have featured unusual ingredients like cornflakes, seawater, cardamom and super-heated volcanic rocks.

And he caught a finger between two volcanic rocks.

The volcanic rocks are lying under the coral, which has been gradually thrust upwards by them.

This tribal remnant sought the refuge of the impenetrable brush and volcanic rocks of Deer Creek Canyon.

We negotiated successfully two small rapids with large volcanic rocks just under the surface of the water.

We found the shore lined with black volcanic rocks, among which there was some difficulty in landing.

West of the great valley the range is composed of Mesozoic beds, together with Tertiary volcanic rocks.