Mount Tibrogargan is a small mountain in the Glass House Mountains National Park, north-northwest of Brisbane, Australia. It is a magma intrusion of hard alkali rhyolite that squeezed up into the vents of an ancient volcano 27 million years ago. Tibrogargan is relatively small compared to other mountains in Queensland and elsewhere, standing at 364 metres, but is the third tallest of the Glasshouse Mountains click here