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Bookmark or Share- Petroglyph - WikipediaPetroglyphs, estimated to be 20,000 years old are classified as protected monuments and have been added to the tentative list of UNESCO's World Heritage Sites. Petroglyphs are found worldwide, and are often associated with prehistoric peoples.
- Eight Spots in the United States Where You Can See PetroglyphsFlickr, by minnemom. Jeffers Petroglyphs is the largest collection of rock carvings in one place in the Midwest. The site has about 8,000 petroglyphs, and they’re sacred for many of the local...
- Photos of Petroglyphs, Pictographs, Rock Art - Geology.comADVERTISEMENT. What is a Petroglyph? A petroglyph is an image that is carved into a rock. This "carving" can produce a visible indentation in the rock, or it can simply be the scratching away of a weathered surface to reveal unweathered material of a different color below. Petroglyph Photo Gallery.
- What are Petroglyphs - U.S. National Park ServicePetroglyphs are rock carvings (rock paintings are called pictographs) made by pecking directly on the rock surface using a stone chisel and a hammerstone. When the desert varnish (or patina) on the surface of the rock was chipped off, the lighter rock underneath was exposed, creating the petroglyph.
- Petroglyph - New World EncyclopediaPetroglyphs are images created by removing part of a rock surfaces by incising, pecking, carving, and abrading. Petroglyphs are found world-wide, and are often (but not always) associated with prehistoric peoples. They are one of the three different techniques used in Rock art, the prehistoric precursors to art.
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