But his departure did not end the Somerset assault, with Kieswetter continuing his best season with the bat by hitting four sixes in his half-century before the declaration came.
With two-and-a-half days remaining in the match, Australia needed to bat at least six sessions if they were to stand any chance of keeping the series alive for the final Test in Sydney on 2 January.
Having won the toss, Australia chose to bat and carded 401-9 declared, with John Dyson constructing a diligent 102 and half-centuries coming from Kim Hughes and Graham Yallop.