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Water glyphs are a recurring type of petroglyph found across the American southwest, but primarily in southern Utah, northern Arizona, and Nevada. The symbols are thought to be of ancient origin, (perhaps created by the Ancient Pueblo Peoples), and have been dated via x-ray fluorescence to ~2,000 old by (Dr. Farrel Lytle ). Classification as a water glyph requires the presence of certain distinctive characteristics including both visual elements and location. Although the glyphs have likely been previously noted by local ranchers and farmers, the recurring pattern was first documented in 1997〔("WATER TRAILS OF THE ANASAZI" ), June 25th 1997 @ Udvar-Hazy business building server(http://144.38.20.128/cody/bobby.html) on the (Dixie State College ) Campus〕 by (Robert Ford ) and (Dixon Spendlove ) of Fredonia, Arizona. To date, more than 370 instances of these petroglyphs had been cataloged in an extensive GIS study.〔(Wilderness Utah - Water Trails of the Anasazi )〕 == Visual Elements == Water glyphs are usually 48 inches long by 24 inches wide, with grooves carved half an inch to an inch deep. * The symbol consists of a circle or ellipse bisected by a single straight line. * The line usually extends beyond the edge of the circle on one side by a distance roughly equal to the diameter of the circle. * Sometimes the extending line drops off the edge of the cliff or rock. * The petroglyph usually contains a single deep depression, or "dot," within or near the circle. Examples of "Waterglyphs": The position of the dot with respect to the glyph varies: * It may be found outside or within the circle * It may be found to the right or left of the bisecting line * It may be found along one of the circular "horizon" lines. The circle may also contain additional arcs, or partial arcs, forming a crescent on one side of the ring, or a double ellipse; but the basic glyph remains the same. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Water glyphs」の詳細全文を読む スポンサード リンク
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