Glass House Mountains, Queensland, Australia

Location: 27.0S, 154.4E

The Glass House Mountains are 45 miles (70 km) north of Brisbane. The volcanic field consists of eroded volcanic plugs made of trachyte and rhyolite. The volcanoes were active 25-27 million years ago. This photo shows the rhyolite peaks of Mt. Tunbubudla volcano. All photos courtesy of Gary Lewis of the AGSO's Geoscience Awareness Unit program.

Mt. Tibrogargan, a rhyolite plug.

Coonowrin, a rhyolite spine.

Sources of Information:

Sutherland, L., 1995, The Volcanic Earth: Sydney, University of New South Wales Press, 248 p.

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