In creating his "fungus accretion" vases, Simon brushed the rough surface of a ceramic vase with a clay-and-water solution until it built upon itself like a hand-dripped sand castle.
So in late 1997, when the navy began dredging 9m cubic yards of sand from San Diego harbour, a ready-made solution seemed at hand: the dredgings would more than replace the beach sand lost over the past decade.