St Kilda's powerful march towards the AFL finals continued as a sensational performance from tough forward Aaron Hamill led a 41-point AFL victory against an impotent Geelong at Telstra Dome.

The Saints won every quarter to grind the Cats into submission and win 13.18 (96) to 8.7 (55).

They have now won six straight games in impressive fashion, while Geelong has lost seven of its past 10 and its hold on a top-eight berth is starting to look shaky.

The margin did not reflect the Saints' dominance of the game, particularly after half-time, with some poor kicking for goal meaning they kicked 8.17 in the last three quarters.

Hamill was the major difference between the two teams, building on the strong form he showed in his return from an 11-game injury absence last week against Melbourne.

His four goals and 11 marks, eight of them contested, were fitting reward for his ferocious attack on the ball and on his opponents.

Fittingly, he sealed the game early in the last quarter with a terrific pack mark from a high Aussie Jones kick and a rock-solid set shot from 45 metres for his fourth goal.

With Nick Riewoldt kicking three goals, the Saints had far too much firepower for the Cats even with full-forward Fraser Gehrig shut out of the game by Cats' full-back Matthew Scarlett who played superbly.

The Saints' forward strength highlighted both the worries Geelong has at its defensive end, with centre half-back Tom Harley missing through injury, and in attack where there was no standout contributor.

Lively half-forward Paul Chapman was the most dangerous looking Cats forward in the first term when he kicked one goal, but he left the ground with a hamstring injury 27 minutes into the match in a major blow for the Cats.

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