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Limestone at Buchan
The limestone at Buchan formed about 380 million years ago under very shallow seas which covered much of East Gippsland. A later period of movement of the earth’s crust raised this area above sea level.
The limestone and overlying mudstone were pushed into a large trough shaped fold (called a syncline), running generally north south. Limestone is a rock that contains more than 50% calcium carbonate, which is usually present as the mineral calcite. The skeletons of most marine animals which lack backbones, such as corals, starfish, sea urchins and shells are made up of calcium carbonate. Some algae can also produce calcium carbonate.
The limestone here is composed of dark grey lime mud through which is scattered numerous fossils. Look at the small grooves in this rock, called ‘Rillenkarren’ or ‘Solution Flutes’. They are formed by rainwater draining across the rock, gently dissolving the limestone. As time goes by, the grooves become deeper.
The Reserve is also a wildlife refuge. Animal life is abundant with over 100 species of birds having been recorded, including King Parrots, White Winged Choughs and Currawongs which can be seen around the camp area.
Listen for the Bellbirds and Lyrebirds near the Fairy Cave entrance. Kangaroos are plentiful, but please do not feed or disturb them. At night the campground comes alive with Brush-tailed Possums and sometimes the calls of Boobook Owls.