These grottoes have been cut in the face of a layer of volcanic rock of extraordinary smoothness and of flesh-coloured hue.
The foreground, on our side of the river, was strewn with boulders of volcanic rock.
A volcanic rock, having the lustre of mother of pearl; usually having a nodular structure; intimately related to obsidian, but less glassy.
At the further or western side rose the middle crest of the mountain, a dark-looking ridge of volcanic rock.
The hills are in many places entirely covered with small fragments of volcanic rock.
This stream is of the same class as the Walahwalah river, with a bed of volcanic rock, in places split into fissures.
A huge block of volcanic rock--shot and deposited there evidently from elsewhere--was to be seen near by.
The domed hills showed through the grass great blocks of volcanic rock, while at the foot of the hills could be noticed huge boulders of consolidated ashes with veins of crystals and marble.
This is a remnant of the vast mass of volcanic rockthat in long ago prehistoric times was poured out in molten sheets over the region, and that formed the range we shall shortly see at the north end of the Lake--the Mount Pluto range.
Obsidian is a volcanic rock--a sort of combination of glass and flint for hardness," Tom explained.
Yes, it is powerful enough, but whether it will have the right effect on volcanic rock is hard to say.
The basin is in volcanic rock, but none of the characteristics of a crater due to volcanic explosions can be recognized.
Between them, separating one from another, the mountain-walls rose precipitously and terminated in bare, columnar peaks of black basaltic or volcanic rock, as sharp as needles.
The whole mass of the mountain consists of volcanic rock, varieties of andesite; there is no trace of a crater, nor of any fragmental materials, such as are usually ejected from a volcanic vent of eruption.
The presence of a small quantity of non-volcanic rock, as of clay-slate on three of the Azores (This is stated on the authority of Count V.
St. Maria has no volcanic rock, according to Captain Boyd (Von Buch "Descript.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "volcanic rock" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
