British artist Andy Goldsworthy created a project that illustrated his commitment to the use of organic material and the exploration of time as a central element within his work. Titled Andy Goldsworthy: Two Stones/Andy Goldsworthy: dos piedras, the work was located at the San Diego Museum of Art and outside in Gold Gulch Canyon, Balboa Park. Created with two large boulders and wooden sticks covered with clay, the pieces were installed and left to dry and crack over the course of the exhibition. The artist documented the progression at each site daily, showing the effects of time on the clay.