It is a magma intrusion of hard alkali rhyolite that squeezed up into the vents of an ancient volcano 27 million years ago.

[1] Tibrogargan is one of the most easily recognised hills in South East Queensland, bearing some resemblance to a woman holding a baby looking over her shoulder.

The name Tibrogargan comes from the local aboriginal words chibur flying squirrel and kaiyathin biting.

[citation needed] In the mythology of the region, Tibrogargan was the father of all the other Glass House Mountains except Beerwah, his wife.

The path is well worn and visible on the SW shoulder but the views from the summit are restricted due to vegetation in comparison to the other nearby rocky peaks.