NSW, Australia
34.6 S, 150.5 E
Lava-field province
Extinct volcano
The southern highlands volcanic province covers about 50 sq km southwest of Sydney, between Kiama and Goulburn. Eruptive centres include Riley's Peak, Mt Wayo, and Mt Wanganderry.
Further reading
Wass, S.Y., 1980. Geochemistry and origin of xenolith-bearing and related alkali basaltic rocks from the Southern Highlands, New South Wales, Australia. Am. J. Sci., 280(A), pp.639-666.
31-55 million years ago