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Event Address
National Rock Garden, Barrenjoey Place, Canberra, ACT
Event Start
14:00
Event End
14:30
Event Details
Friends of the National Rock Garden are invited to attend the opening of the Mt Gibraltar microsyenite display at the National Rock Garden, Barrenjoey Place, Canberra, ACT.
The Mount Gibraltar Microsyenite is an alkaline igneous intrusive body which was emplaced into Triassic Hawkesbury Sandstone around 178 Ma. It is now exposed by erosion as an imposing mountain adjacent to the rural town of Bowral. It provides a rare example of a rock that contains siderite (FeCO 3 ) as a component of a magmatic mineral assemblage.