Petroglyph – Art, illustration, or message made by removing the surface layer of stone.

Petrolglyph – A visible remnant of drilling for or moving petroleum taken from the earth. Examples: Subsidence of land. Oil derricks or pumps on the landscape. Oil left over from a spill.

Pet Your Glyph – Gylphs are social creatures and appreciate social bonding events. Examples: A pat on the head.