The central portion of Apollo has been covered by dark basaltic lava, and Onizuka lies at the southern edge of this plain.

Most of the surface of the ground was tumbled, pitted rock-cindery scoria and solidified dark lava.

Because of its anhydrous nature, gregoryite reacts quickly with the environment, causing the dark lava to be converted to white substance within hours.

He glanced around a taller irregular rock in time to see a patch dark gray against the darker lava downhill.

Spanish explorers who futilely searched for gold amid the mountains layered in dark lava and light ash called it "the unknown land."

Now hardy grasses peeped up here and there through the dark mounded lava.

The circular feature surrounded by dark lava flows in the western part of the image is a caldera, or large volcanic collapse pit.

The black or dark brown lava and ash erupted begins to turn white within a few hours.

A sequence of bright and dark lava flows appears in the image, the bright ones believed to be associated with the more recent volcanism.

Thus animals living mainly on dark lava are darker than ones which live in lighter, sandy environments.