American, 1938–1973. During the early 1960s, Smithson shifted from making collages and paintings towards a drastically different style of producing art. Robert Smithson was an American artist and writer who reigned the movement of Land Art. His works were a result of the combined influences of his contemporaries, geology, science fiction, and the process of entropy. He is best recognized for his large scale geographical sculpture, “Spiral Jetty” (1970), a large, coil-shaped basalt formation extending out into the waters of the Great Salt Lake in Utah. Smithson's work explored the opportunity of converting the non-fertile parts of geography and energy into a natural museum.