Lake Bullen Merri
The Lake Bullen Merri, also written Bullenmerri Lake, is a maar at Camperdown in Victoria, Australia, which was created about 20,000 years ago during a volcanic eruption. A short distance to the north, Lake Bullen Merri is Lake Gnotuk, a single small Maar, which is 40 m deep.
The Lake Gnotuk only reaches a water depth of 20 meters and has a twice as high salt content as sea water and he only has half the area of Lake Bullen Merri.
The Lake Bullen Merri gives the impression that there are two interconnected crater lakes, because the shape of a three-leafed clover has emerged. The Lake Bullen Merri is a maar, the Lake Gnotuk flooded the mid-19th century. The Lake Bullen Merri is filled 60 feet deep and with brackish water.
Further investigations showed the sediments in both lakes that the salinity changed in the last 10,000 years and the water level in both lakes over the last 100 years showed a steady decline. This can be seen on the trail of the water level at the shoreline.
The shore end of Lake Bullen Merri was marked in the late 19th century by James Dawson with a stone and you can then see that the water level has dropped in the last 100 years.
Near the Lake Bullen Merri Wurrung found in 1839 the Murdering Gully massacre took to the Aborigines of Djargurd. This water is frequented by anglers and swimmers and it was banned in January 2012 due to the occurrence of toxic algae.