Hanging Rock (also known as Mount Diogenes, Dryden's Rock, and to some of its traditional owners as Ngannelong) is a distinctive geological formation in central Victoria, Australia. A former volcano, it lies 718m above sea level (105m above plain level) on the plain between the two small townships of Newham and Hesket, approximately 70 km north-west of Melbourne and a few kilometres north of Mount Macedon.
Hanging Rock is a mamelon, created 6.25 million years ago by stiff magma pouring from a vent and congealing in place. Often thought to be a volcanic plug, it is not. Two other mamelons exist nearby, created in the same period: Camels Hump, to the south on Mount Macedon and, to the east, Crozier's Rocks. All three mamelons are composed of soda trachyte. As Hanging Rock's magma cooled and contracted it split into rough columns. These weathered over time into the many pinnacles that can be seen today.
Hanging Rock contains numerous distinctive rock formations, including the "Hanging Rock" itself (a boulder suspended between other boulders, under which is the main entrance path), the Colonnade, the Eagle and the UFO.
Loading contexts...