A geoglyph is a large design or motif (generally longer than 4 metres) produced on the ground and typically formed by clastic rocks or similarly durable elements of the landscape, such as stones, stone fragments, live trees, gravel, or earth. A positive geoglyph is formed by the arrangement and alignment of materials on the ground in a manner akin...
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images formed on the ground by scraping away surface material to form an image out of the exposed underlying soil, or by arranging stones to form a figure such as a petroform
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geoglyph, geoglyphs, geoglyphic, geoglyphics Any ground-constructed example of rock art; such as, intaglios or rock alignments; straight lines, geometric shapes, and other representative designs found on the desert plain. Geoglyphs can be formed by piling up materials on the ground surface or by removing surface materials and most suggest a largel...
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http://www.wordinfo.info/words/index/info/view_unit/2483/
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