We set off up Mt Ngungun - pronounced Noonoo, at 8am and by 9am we were at the top. The Glasshouse Mountains are interesting intrusive Trachyte domes, but are not very high. They are. however, steep to vertical. The only explanation for this cave is that it formed in loosely consolidated pillow lavas as the overlying sandstones were worn away by erosion.
Mt Beerwah is closed due to rockfall. A rock the size of a large car fell across the summit track and a few of its friends joined it. Is is felt that rain may bring down more rocks and so the mountain remains closed.
You can see the columnar jointing in the volcanic rock that formed it. This tells one that the rock cooled slowly; thus it is intrusive, not lava that spewed out onto the surface.