Earth science fascinated Smithson when he was growing up in New Jersey. As a kid, he collected fossils and seashells, proudly displaying them in a “museum” in his basement. This early interest in nature stayed with Smithson, inspiring him to use organic forms in his art.
Smithson’s best-known sculpture, called Spiral Jetty, above, is an enormous spiral that juts into Utah’s Great Salt Lake. Created in 1970, it consists of rock, mud, and salt. The monumental coil is 1,500 feet long and 15 feet wide. The artist chose to create a spiral because it is one of nature’s basic shapes and suggests a galaxy or a seashell. Viewers can experience this earthwork by walking on top of it or boating around it.
Spiral Jetty still exists today, but it has changed over time. In the 1970s, the water level rose, completely submerging the sculpture. When it re-emerged during a dry spell 30 years later, salt residue had stained the rocks white.