Evidence for fire fountaining at Skillion Hill, Southern Tasmania

At Skillion Hill, Southern Tasmania, a Cenozoic alkaline basaltic volcanic centre, 600 m in diameter, is composed of overlapping lenses of vesicular lava, fluidal and blocky basaltic breccia and dykes. It is likely that Skillion Hill was formed from eruptions of alkaline, low viscosity lava with high effusion and/or low eruption columns (to form coalesced spatter), alternating with eruptions having a higher volatile content and greater explosivity which formed more vesicular lava, breccias and volcanic bomb-rich deposits.

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