Well, as of this moment, there isn't any volcanic activity. Obviously. Otherwise we'd be feeling earthquakes all the time and constantly running away from a steady stream of lava (like one of those endless runner games).
However, this page is going to focus on Taroona's past volcanic activity, not the present. So.
Basically, volcanic vents appeared in Tasmania 58 to just 8 million years ago. Basalt lava flows formed to a thickness of 20 feet (6.1 metres). In Sandy Bay, basalt has been found that dates from 26 to 0.3 million years ago: so it's potentially quite recent! There's not much else to say apart from the fact that the eruptions date from the Oligocene (when there was a global expansion of grasslands and regression of tropical forests) and Miocene (rise of the apes, humans find own evolutionary path) periods.
Oh, and here's an interesting thing: in the northwest of Tasmania, there was so much lava that valleys filled and overflowed, creating lava flows over 2,460 feet thick (750 metres)!
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