"Excavation" is a trompe l'oeil piece. Half of the circle is composed of cactus fragments and rusted metal pieces that are painted to look like the cactus fragments. The other half of the circle is composed of rusted metal and cactus fragments that are painted to look like the rusted metal. It is virtually impossible to distinguish between the manmade objects and the natural objects, thereby blurring the distinction between them. Cactus, metal; 6' diameter; 1998.