an earthwork sculpture constructed on the northeastern shore of the Great Salt Lake near Rozel Point in Utah, in April 1970 that is considered to be the central work of American sculptor Robert Smithson. Built of entirely of mud, salt crystals, basalt rocks and water Spiral Jetty forms a 1,500-foot-long (460 m), 15-foot-wide (4.6 m) counterclockwise …
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