Wollumbin’s been around a long time. Over 23 million years ago, a shield volcano filled the landscape near where I live. Its diameter was over 100 kilometres (62mi) and its height 1156 metres (3,793ft). This large round shape and low profile resembled a warrior’s shield, hence its geological name. All that remains now is the eroded caldera around a volcanic plug. Yet what remains is significant. A caldera is the large cauldron-like… Read More