 Pre-Roman silver slag is found in the Tartessian cities of Huelva Province.Cypriot and Phoenician metalworkers produced 15 million tons of pyrometallurgical residues at the vast dumps of Riotinto.Mining and smelting preceded the arrival, from the 8th century BC onwards, of Phoenicians and then Greeks, who provided a stimulating wider market and whose influence sparked an "orientalizing" phase in Tartessian material culture (ca.750-550 BC) before Tartessian culture was superseded by the Classic Iberian culture.