A petroglyph is an image that has been carved or engraved into a rock surface. The meanings of many petroglyphs at Parowan Gap have been lost over time. Multiple contemporary interpretations of the Zipper Glyph include a travel map, symbolizing the journey path and time taken, or perhaps a solar calendar with an outline that conforms to the contours of the Gap at The Narrows. Photographer: Bob Biek