In the Lake Superior region the older Proterozoic strata are nearly all more or less folded and altered (metamorphosed), and they have been intruded by considerable bodies of molten rock, mostly granite.
Sheets of molten rock, averaging fifty to one hundred feet in thickness, spread out over various parts of the region and piled up by overlapping layers one over another until the lava plateau more than a mile high was built up.
Frightful roaring sounds are suddenly heard, the earth shakes for many miles around, when suddenly a vast quantity of molten rock, and sometimes huge stones, are thrown out of the crater high up into the air.
These fissures were afterwards filled with molten rock, and in this manner were formed the long dikes of porphyry and other rocks that are seen to be passing through some of the older lavas of Mt.
From this fissure flames burst out, fragments of burning rock and stone, together with large quantities of ashes were thrown to great heights in the air, and were followed by streams of molten rock.
When rapidly cooled, as on the surface of a lava flow, molten rock chills to a glass, because the minerals of which it is composed have not had time to separate themselves from the fused mixture and form crystals.
In a volcano, molten rock from a region deep below, which we may call its reservoir, ascends through a pipe or fissure to the surface.
In each caldera the floor, which to the eye is a plain of black lava, is the congealed surface of a column of molten rock.
As already pointed out, a volcano at its birth is not a mountain at all, but only, so to speak, a shaft or channel of communication between the surface and a subterranean reservoir of molten rock.
The pointing rod lingered upon the huddled bodies for an instant, while that which had been human flesh vanished in a bursting cloud of smoke; while the stones beneath turned to a seething pool of molten rock.
There was a pool of molten rock, white and glaring with heat .
Yet before it changed Danny saw unbelievable things--pools of molten rock, glaring white through the smoke.
So if there's molten rock, or magma somewhere in the way, the shock wave that goes through it will slow down and arrive at the recorder later?
Toward this devoted town poured steadily the irresistible flood of molten rock.
The most marked variations in the process depend on the quantity of molten rock extruded, and on the freedom of escape of the steam and gases contained in the lava.
It was on Saturday, the 7th, that Bosco Trecase became the prey of the river of molten rock.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "molten rock" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
