The window in the cliff had become no more than dark rock.

As she went higher, the dark rock became dirt, in places held back with beams.

A huge dark rock, at least two hundred feet high, reared up a short distance away.

Indeed Mark thought that he could see some blackening, though on the dark rock it was difficult to be sure.

Here and there among the green were patches of dark red rock that might be blood, or mouths.

Blade saw a faint line of shadow in the dark rock.

Nothing else moved on the shelf of smooth dark rock.

His world was cut off now and circled by the dark rocks.

I could see the dark rocks upon which the vehicle was resting.

Only a few patches of dark rock were visible near the floors.