The ancient Greeks had a myth about five successional kinds (ages) of mankind: gold, silver, bronze, heroic and iron. While most classicists accept the last three kinds have some basis in historical truth (interpreting them as the archaeological sequence of bronze and iron metalworking), the silver or gold kinds are instead treated as metaphorical or symbolic. In this article it is instead argued for a geomythological interpretation; the first two metals as a folk memory of the Neolithic, when deposits of these native metals were discovered.
Smith, O. D. (2018). "Hesiod and Geomythology". Logoi: The Oxford and Cambridge Undergraduate Classics Journal. 1(1): 1-10. URL