July, 1929 
The 1 Queensland Naturalist 
29 
the sandstone. Rhyolite has been recorded as underlying 
in places the basalt of the Blackall Range, and the Glass 
Houses are trachyte. In geological age these have been 
generally accepted as belonging to the Tertiary period, 
though without definite proof. Of late years observa- 
tions have been multiplied of Mesozoic volcanic rocks in 
other localities. At Caloundra numerous trachytic pebbles 
occur in the sandstone which is of Mesozoic, probably 
“Bundamba” age. There seems some possibility that 
eventually the Glass Mouses will prove to be of Mesozoic 
age also, Further field observations are required, which 
members of this Club might bear in mind when in the 
district. 
In the Stanley at the junction with Ewen Creek the 
stones are mostly basalt, with an odd piece of granite 
showing that the westward limit of the sandstone does 
not extend to the very head of the river. On the Kileoy 
railway near D ’Aguilar, a very large fault determines 
the boundary of the sandstone and granite, and it would 
be very interesting to know whether this faulted junction 
extends as far as the Blackall Range, or if not, the nature 
of the contact. 
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ADDITIONS TO THE LIBRARY. 
Since the announcement made at the March meeting 
regarding the library (see p, 21), the sub-committee 
appointed report having received a cash donation of ten 
shillings, and copies of the following works : — Confessions 
of a Beachcomber (Banfield), My Tropic Isle (Banfield), 
Plant Life and its Romance (Weiss), Shell Life (Step), 
Wild Animals of Australia (Lucas and Le Souef), 
Through a Land of Promise (Terry), Men of the Old 
Stone Age (Osborn), Science of the Sea (Allen), Timbers 
and Forest Products of Queensland (Swain), Pests and 
Diseases of Queensland Fruits and Vegetables ( Veitch 
and Simmonds), The Platypus (Burrell), A Naturalist in 
Nicaragua (Belt), Birds (Thomson), Modern Study of 
Plants (Slopes), and Bush Days (Amy Mack). 
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