Some of these actually triggered volcanism, which created these huge pools of molten rock on the surface, which then solidified to form a rock called basalt, which are the dark splodges that we can see on the moon today.
Splodge is a fictional character from the British comic strip, The Topper. Drawn by Charles Grigg, Splodge himself was the last of the goblins, a mischievous one who would play sneaky, nasty tricks on the animals of the woods, but they usually had the last laugh at the end. No humans could see or hear him, except readers of The Topper.