Gianfranco Gorgoni, “From the portfolio Smithson’s Spiral Jetty Photographs, 1970-2014,” 1970, digital print, 13 x 17 in. Utah Museum of Fine Arts, purchased with funds from The Paul L. and Phyllis C. Watts Fund, UMFA2018.6.1.8. Photo © Estate of Gianfranco Gorgoni. Art © Holt/Smithson Foundation and Dia Art Foundation / VAGA at Artist Rights Society (ARS) NY