Lava flows from the Port Hills have been widely used as building stone around Christchurch. This stone wall, outside St Barnabas Church in Fendalton, is typical. The inset shows the gas bubbles (vesicles) and white crystals of feldspar which had started to form the magma before it was erupted.
Te whakamahi i tēnei tūemi
Photograph by Glen Coates
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