Volcanoes Are the Original 3D Printer, Everything Else Is Geomimicry references plastiglomerate, a recently classified anthropogenic stone discovered in Hawai’i, where melted beach plastic fuses with basalt to form a synthetic composite, accidental, but stratigraphically real. The iron is sharp: as plastic trash melds with volcanic substrate, the beach becomes both a dump site and a kiln. Meanwhile, 3D printing pens (like the one I used to make this piece) are sold to children as creative tools, despite plastics comprising the majority of ocean pollution. In this work, layered filaments of plastic echo the textures of pahoehoe lava, highlighting how extrusion, laying, and terrain formation have long been the domain of geologic forces, only recently to be appropriated by technological progress. Additive manufacturing is less invention and more geomimicry; the volcano came first.