Lake Wombat formed when a big block of ice melted about 9,000 years ago.
(Lake Wombat; formed; T:when a big block of ice melted about 9,000 years ago) (a big block of ice; melted; T:about 9,000 years ago)
Lake Wombat a big block of ice
formed melted
T:when a big block of ice melted about 9,000 years ago
T:about 9,000 years ago