In addition, there is rock art made by aligning or piling natural stones. The stones themselves are used as large markings on the ground.
One can find petroglyphs and pictographs on the walls of a cave or on rock in open-air.
Rock art has also been described as rock records,[2] rock sculptures,[3] rock inscriptions,[4] rock carvings,[5] rock paintings,[6] rock engravings,[7] rock drawings,[8] rock pictures,[9]
The term "rock art" appears to have been used first used in about 1959: "The rock art tells us little for certain about marriage customs." J D. Clark, Prehist. S. Afr. ix. 248, 1959
Man No. 119. 178/2, 1939: "On one of the stalactite pillars was found a big round stone with traces of red paint on its surface, as used in the rock-pictures"
Malotki, Ekkehart and Weaver, Donald E. Jr., 2002, Stone Chisel and Yucca Brush: Colorao Plateau Rock Art, Kiva Publishing Inc., Walnut, CA, ISBN1-885772-27-0 (cloth). For the "general public", this book has well over 200 color prints with commentary on each site where the photos were taken; the organization begins with the earliest art and goes to modern times.
Rohn, Arthur H. and Freguson, William M, 2006, Puebloan ruins of the Southwest, University of New Mexico Press, Albuquerque, NM, ISBN0-8263-3970-0 (pbk,: alk. paper). Adjunct to the primary discussion of the ruins, contains color prints of rock art at the sites, plus interpretations.
Schaafsma, Polly, 1980, Indian Rock Art of the Southwest, School of American Research, Sana Fe, University of New Mexico press, Albuquerque, NM, ISBN0-8263-0913-5. Scholarly text with 349 references, 32 color plates, 283 black and white "Figures", 11 Maps, and 2 Tables.
Rock Art studiesArchived 2002-01-27 at the Wayback Machine - A Bibliographic database at the Bancroft Library containing over 10,000 citations to the world's rock art literature.