Sentences with phrase «molten rock once»

IF MOLTEN rock once rained onto Earth's surface, it might explain puzzling differences between the chemical compositions of our planet and the moon.

Not exact matches

At its base, scientists expect to find a hodgepodge of chunks of bedrock blasted up by the impact and once - molten rock that fell back into the crater in the minutes after impact.

Apparently it was once a molten world, similar to early Earth, whose interior separated into a mantle and a crust covered with volcanic rock.

Lava leaking from the ridges creates the crust's upper layer; beneath that lies a second layer, composed of the fossilized channels that once piped molten rock to the ridges.