Hout Bay Manganese Mine is one of three mines still in tact in the Greater Cape Town region. The manganese occurs in a narrow lode up to 1.14 metres wide and hosted by sandstone of the Ordovician Peninsula Formation. The lode trends northwest for 600 metre and at this site it was worked by shallow open-cast mining. The ore was sent down a chute lined with with corrugated iron sheets to a jetty near Chapman's Peak Drive from where it was shipped to Belgium.