3) THE GLASSHOUSE MOUNTAINS 
Visitors to the mountains should stay at Bankfoot House 
kept by Mr. Grigor,* an old resident, who can supply horses 
and guides. The nearest railway station is Glass Mountain 
Station, distant about 45 miles north of Brisbane. Bank- 
foot House stands right in the centre of the Glasshouses. 
The mountains lie roughly on north and south lines in 
groups of three ; each group of three les on a transverse 
axis, cutting the N. and S. axis almost at right angles. 
Taking the three lying immediately north of Grigor’s— 
Ngungun, Coonowrin and Beerwah—it will be found on 
ascending Ngungun, an easy feat by climbing round its 
south-eastern face, that the points of the other two lhe 
from Ngungun in one and the same straight line. North 
of these, Mount Mellum, Mt. Blanc and Candle Mountain 
lie along a parallel straight line, and to the south on a third 
parallel lie Barren Mountains, Tibrogargan and Mt. Ewan, 
while south again on an east and west line are Beerburrum 
and the twin peaks of Toonbubudla. The theory advanced 
by Mr. Lionel Ball, and by Mr. Jensen is that the north 
and south lines represent immense faults or fractures or 
lines of weakness in the rocks north of Caboolture, and that 
these fractures when formed along north and south folds 
cause smaller cross fractures. If we press with a straight 
piece of wood on the surface of a pie crust, the crust will not 
only break along the line of pressure, but also in numerous 
places at right angles to the main fissure. Mr. Stokes 
asserted that there were two or three main lines of fracture 
parallel to the coast, and that each extinct volcano was 
placed where the cross faults or fissures cut these. 
The columnar structure of these mountains is evident 
from a distance, on each mountain the columns in the centre 
are vertical, but on the slopes are parallel to the angle of 
slope, and all converge towards the summit. The columns 
on Toonbubudla, the twin peaks, present a very curious 
structure. Where the end of a prism is exposed, it looks 
like a gigantic honeycomb, each column is again divided 
into many smaller prisms, which are similar in shape to 
the parent mass. The various peaks do not show the 
greatest effect of denudation. on the side facing the sea, 
* Since writing the above news of Mr. Grigor’s death has been 
received. 
