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MAKE A MEME View Large Image This man-made sandstone cairn was built in the 1860s. First noted by explorer and surveyor John Oxley in 1823, concerns about the navigational hazards posed by the rocks, 17 miles upriver from the penal settlement, were raised from early ...

This man-made sandstone cairn was built in the 1860s. First noted by explorer and surveyor John Oxley in 1823, concerns about the navigational hazards posed by the rocks, 17 miles upriver from the penal settlement, were raised from early ...

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Keywords: seventeen mile rocks seventeenmilerocks 17 mile rocks 17milerocks brisbane cairn man made manmade sandstone river marker brisbane river brisbaneriver warning queensland australia outdoor This man-made sandstone cairn was built in the 1860s. First noted by explorer and surveyor John Oxley in 1823, concerns about the navigational hazards posed by the rocks, 17 miles upriver from the penal settlement, were raised from early days of settlement. The rocks were the site of many shipping accidents, some resulting in severe damage to a vessel or (occasionally) in total loss of a vessel. The issue became particularly important with the expansion of the steamer trade between Brisbane and Ipswich. Substantial works were undertaken between 1862 and 1866 to widen and deepen the channel. This included the construction of a stone cairn with beacon on the south rock and the installation of another beacon on the north side. cshsoc.files.wordpress.com/2012/08/the-seventeen-mile-roc... This man-made sandstone cairn was built in the 1860s. First noted by explorer and surveyor John Oxley in 1823, concerns about the navigational hazards posed by the rocks, 17 miles upriver from the penal settlement, were raised from early days of settlement. The rocks were the site of many shipping accidents, some resulting in severe damage to a vessel or (occasionally) in total loss of a vessel. The issue became particularly important with the expansion of the steamer trade between Brisbane and Ipswich. Substantial works were undertaken between 1862 and 1866 to widen and deepen the channel. This included the construction of a stone cairn with beacon on the south rock and the installation of another beacon on the north side. cshsoc.files.wordpress.com/2012/08/the-seventeen-mile-roc...