82 
The Queensland Natubalist. 
VoL. I, 
(3). The plants are decisive. If they were of Ipswicli 
age it would follow' that here alone, in all the Avorld, a rich 
dicotyledonous flora existed in the earliest Trias-Jura 
epoch. This is inconceivable, and I cannot imagine how- 
anyone who ever saw the fossils had any doubt as to their 
Tertiary age. I am inclined to class them with the Laramie 
Beds, that is very old Eocene. 
Finally, I may add, that near Hillside Farm, Oxley, 
these beds have been cut through by the Brisbane River. 
I have much more evidence, which I hope to publish 
in the transactions of our Royal Society. It suffices here 
to have vindicated the views of my old host in the wilds of 
Queensland, Mr. H. G. Stokes. 
NOTE. — The accompanying Map is to be regarded as 
oiily a sketch or key. 
NOTES ON SPECIMENS OF MAGNESITE FROM 
NEAR TOOWOOMBA. 
By Leonard C. Green, mj.m.e., etc., 
AND Arthur T. Hockings. 
* 
Among the sX)ecimens collected during tlie late visit 
of members of the Field Naturalists’ tffiib to Toowoomba, 
were some rather interesting specimens of Magnesite. 
The mineral occurred in the basalt of that district, some 
five miles due south from Toow^oomba, near Rocky Moun- 
tain. The age of the basalt, which is the remnant of a 
very large flow, lias not yet been determined ; but if con- 
nected wdth the hows, which are now found as outliers 
in the Brisbane district, there is ])Yooi of its being of Post- 
Tertiary age. At (brinda such an outlier occurs lesting 
on eroded surfaces of Tertiary rocks. In situ, the Mag- 
nesite occurs in rude mammillated nodules. The colour 
is almost jiure white, the hardness varies from 3 to 6. w-hile 
the sx>ecihc gravity is slightl}^ under 3. The mineral, 
which has an earthy lustre, breaks wuth a conchoidal tn 
sub-Gonchoidal fracture. The sux:>eri<u' hardness of some 
portions of the mineral is remarkable, and might, in the 
absence ot analy^sis, be accounted for by the presence 
of silica. Such, however, is not the case, as the following 
analysis will show : — 
]\Ioi store 
1.32% 
AbO.'! 
1.12 
FeC()3 
1.84 
CaCOa . 
15.35 
MgCOs 
80.83 
* Read at meeting of Field Naturalists’ Club, 22nd November, 1907. 
