reference for jewellery in science
Many boundaries between geologic eras are marked by physical golden spikes.
Cover image: Anthropocene spike, a golden spike driven into a rockface to mark the beginning of the Anthropocene geological era. © Victoria and Albert Museum, London
Does the Anthropocene, the Age of Humans, Deserve a Golden Spike? article, The New York Times
Driving the Golden Spike, article, e-flux
Credit Brad Sageman, Northwestern University