In 1970 Robert Smithson (1938-1973), one of the most innovative and provocative artists of the twentieth century, created the landmark earthwork Spiral Jetty at Rozel Point on Utah's Great Salt Lake. This dramatic and highly influential work forms a coil 1,500 feet long and 15 feet wide and stretches out counterclockwise into the lake's translucent red water. Composed of black basalt rocks and earth, the sculpture comprises the materials of its location:...