Australia end dismal T20 World Cup by thrashing Oman
Marsh reached his fifty inside the six-over power play and hit four sixes and seven fours in all as Australia, having bowled out Oman for 104, raced to 108-1 with more than 10 overs to spare.
Fellow opener Travis Head made 32 and Josh Inglis 12 not out but the win against a 20th-ranked Oman side will be scant consolation after a chaotic campaign in Sri Lanka.
A depleted Australia failed to make the second phase for only the second time in the event's history after defeats to Zimbabwe and co-hosts Sri Lanka.