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The term petroglyph should not be confused with pictograph, which is an image drawn or painted on a rock face. Both types of image belong to the wider and more general category of rock art. Petroforms, or patterns and shapes made by many large rocks and boulders over the ground, are also quite different. Inukshuks are also unique, and found only in the Arctic (except for reproductions and imitations built in more southerly latitudes).
Petroglyphs on Newspaper Rock near Canyonlands National Park, south of Moab, south eastern Utah, USA
A petroglyph of a caravan of bighorn sheep near Moab, Utah, USA; a common theme in glyphs from the desert southwest
Asia Photo of Cheung Chau Rock Carving
Pacific Petroglyph on western coast of Hawaii
North America Petroglyphs on a Bishop Tuff tableland, eastern California, USA