AT THE POINT
Looking north from the degree confluence
Location: Degree Confluence 22°S 138°E is adjacent to, and east of, the Qld-NT border. At this location the border is marked by a vermin-proof fence. Access is via the Urandangi Tobermorey Rd, which runs N-S along the border approximately 250m west of the confluence point. The RGSQ members reached the point in four 4WD vehicles via Manners Creek station in NT (in May 2008).
While usually dry, creeks in the area connect to the Georgina River, a part of the Eyre Basin.
Old surveyors campsite near the point
The geology of the area is given as Lower Ordivician sedimentaries (including limestone, calcarenite, dolomite, marl, sandstone, siltstone, shale).
Point Photo Credits: Paul Feeney, Mary Comer
Point Information Compiled By: Jo & Col Grant
IN THE DEGREE SQUARE
Climate: The closest representative weather station to the confluence is at Urandangi, which has an elevation of 174 m. The station has been recording data since 1891.
The highest temperature recorded was 47.0°C in December 1979, and the lowest was -2.0°C in both June 2002 and July 1984. The greatest rainfall recorded in a year was 925.2 mm in 1950, and the lowest was 29.5 mm in 1928. These and other climate statistics for Urandangi can be found at: Australian Bureau of Meteorology, http://www.bom.gov.au/climate/averages/tables/cw_037043_All.shtml.
Extremes of Nature: Despite the area's inland location, it is still subject to the impact of some cyclones. The database maintained by the Bureau of Meteorology shows that five cyclones have passed within 200 km of the confluence since 1906, although none have passed within 50 km. However, even distant cyclones bring with them potentially destructive winds and intense rainfall. Cyclone information for this area and all of Australia can be found at the Australian Bureau of Meteorology website, http://www.bom.gov.au/cgi-bin/silo/cyclones.cgi.
Like most places in the Australian tropics, extreme heat is also a danger. Records show that the Urandangi Station experiences 152 days annually with temperatures 35°C or warmer, 53 days of which reach over 40°C. Such extreme temperatures can cause heat stroke and death if appropriate measures are not taken such as avoiding strenuous physical effort, keeping as cool as possible and drinking lots of water. Heat waves kill more people in Australia than all other natural hazards combined. With a low average rainfall, and only 31 days a year with any precipitation, the area is also among the driest in Australia.
This degree square is unpopulated.
Settlement of Urandangi on the banks of the Georgina River (Google Earth image)
Edited by: Hayley Freemantle
Geoscience Australia, NATMAP Raster
Geoscience Australia, Scanned 250 K Geology Maps