London Bridge (karst)
Encyclopedia
London Bridge is a limestone
karst
near Canberra
, Australia
that consists of a limestone arch hollowed out by the Molonglo River
.
It was first discovered by the European explorers Captain Mark Currie
, Brigadier Major John Ovens, Joseph Wild
and accompanied by two nameless aboriginal guides in 1822. It was in danger of being flooded by the construction of the London Bridge Dam but owing to its limited catchment, the Australian Government constructed Googong Dam instead. London Bridge is inside a nature reserve and is thus now protected.
Limestone
Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate . Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera....
karst
KARST
Kilometer-square Area Radio Synthesis Telescope is a Chinese telescope project to which FAST is a forerunner. KARST is a set of large spherical reflectors on karst landforms, which are bowlshaped limestone sinkholes named after the Kras region in Slovenia and Northern Italy. It will consist of...
near Canberra
Canberra
Canberra is the capital city of Australia. With a population of over 345,000, it is Australia's largest inland city and the eighth-largest city overall. The city is located at the northern end of the Australian Capital Territory , south-west of Sydney, and north-east of Melbourne...
, Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
that consists of a limestone arch hollowed out by the Molonglo River
Molonglo River
The Molonglo River rises on the western side of the Great Dividing Range of eastern Australia in the state of New South Wales. Its source is on the other side of the mountain range from where the Shoalhaven River rises, in Tallaganda state forest at ~1200 metres altitude...
.
It was first discovered by the European explorers Captain Mark Currie
Mark Currie
Mark Currie is the name of:* Mark Currie , games developer* Mark John Currie , early settler in Western Australia* Mark Currie , English cricketer...
, Brigadier Major John Ovens, Joseph Wild
Joseph Wild
Joseph Wild was an early explorer of Australia. He was sentenced on 21 August 1793 in Chester for burglary, together with his brother, George. Both were transported to Australia as convicts in 1797, arriving in Port Jackson on the ship the Ganges on 2 June...
and accompanied by two nameless aboriginal guides in 1822. It was in danger of being flooded by the construction of the London Bridge Dam but owing to its limited catchment, the Australian Government constructed Googong Dam instead. London Bridge is inside a nature reserve and is thus now protected.