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Sagot :
Rock art is found throughout the world. These images afford us rare opportunities to look into the past and provide us with insight into the lives of ancient peoples. The southwestern United States is rich in this art, and Saguaro National Park has many rock art sites. Most southwestern rock art predates written history and had its origins hundreds (and perhaps thousands) of years ago among the people of this region.
Prehistoric occupation of Saguaro National Park spans the Archaic and Hohokam periods. Evidence of the Archaic Period in the park, which may go back as far as 5000 B.C., is limited to temporary camps and hunting sites. The Hohokam were farmers, gatherers and hunters who lived in the river valleys and deserts of southern Arizona from about A.D. 300 to 1450. Most of the rock art in the park appears to be from the Hohokam Period. Prehistoric rock art in Tucson falls into two categories: petroglyphs and pictographs. In the Hohokam region, the rock art is primarily petroglyphs.
Messages in Stone
Petroglyphs
Petroglyphs are designs pecked, incised or abraded onto rock surfaces. Petroglyph artists preferred patinated surfaces. Patina is a natural geological process that results in a dark coating on rock surfaces. It is also known as desert varnish. Chipping away on a patinated surface exposes the lighter color beneath. Different methods were used to create the petroglyphs. Pecking was the most common method used and was accomplished by a direct blow with a hammerstone or indirectly by striking a stone held against the rock face with a second stone or hammerstone. Another method was scratching or incising designs onto the rock surface with a sharp-edged stone. Abrading was sometimes
Prehistoric occupation of Saguaro National Park spans the Archaic and Hohokam periods. Evidence of the Archaic Period in the park, which may go back as far as 5000 B.C., is limited to temporary camps and hunting sites. The Hohokam were farmers, gatherers and hunters who lived in the river valleys and deserts of southern Arizona from about A.D. 300 to 1450. Most of the rock art in the park appears to be from the Hohokam Period. Prehistoric rock art in Tucson falls into two categories: petroglyphs and pictographs. In the Hohokam region, the rock art is primarily petroglyphs.
Messages in Stone
Petroglyphs
Petroglyphs are designs pecked, incised or abraded onto rock surfaces. Petroglyph artists preferred patinated surfaces. Patina is a natural geological process that results in a dark coating on rock surfaces. It is also known as desert varnish. Chipping away on a patinated surface exposes the lighter color beneath. Different methods were used to create the petroglyphs. Pecking was the most common method used and was accomplished by a direct blow with a hammerstone or indirectly by striking a stone held against the rock face with a second stone or hammerstone. Another method was scratching or incising designs onto the rock surface with a sharp-edged stone. Abrading was sometimes
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