Quite beautiful, a clear deep rock pool sliced into the back of a narrow cleft.

Only those with some taste for deep rock, who managed to reach a suitable vein of it, would survive.

Evidently the pipe had emerged from the deep rock and was now at or near the surface, possibly even above it.

Any realistic attempt to harvest geothermal energy from deep hot dry rocks failed.

Another section of the deeper rock collapsed, but the tower shivered.

A 1.8 m deep rock lies between the two groupings.

Because these deep rocks are gradually deforming they cannot store energy, which is a requirement for having earthquakes.

Again the tremors shook the mountain, reverberating out of the deep rock.

And he could not simply step into deep rock.

"We must find each other," she said immediately, rapping her message into the deep rock.