XII. 
ABSTRACT OP PROCEEDINGS. 
minerals of importance in general order of abundance are, Zircon 
(S.G. 4. 5-4.7), Ilmenite (S.G. 4.5-5.0), Rutile (S.G. 4.184.25), Monazite 
(S.G. 4.9-5.3), Cassiterite (S.G. 6. 8-7.1), gold and platinoid metals. 
The emphasis to-day is on the recovery of Zircon, Rutile, and Monazite 
because there is really no market for Ilmenite, and the other minerals, 
are so patchy in their distribution and so small in amount. Much 
interest exists as to the origin of these minerals, and while crushed 
samples of the lacustrine sandstone of Mesozoic age near the more 
important beach deposits yield on panning the same heavy minerals 
in somewhat similar proportions, it is recognised that the sandstone 
must be a secondary source. General opinion favours as a primary 
source, igneous rocks, and the New England granite composite 
batholith is most favoured. To some minor extent the Cainozoic 
volcanic rocks on the coast may have contributed. Extension of the 
deposits inland from the present-day strand line has been determined 
in several borings on the slightly elevated coastal plain, so there seems 
little doubt as to existence of very extensive reserves of heavy minerals. 
Dr. W. H. Bryan exhibited a graptolite from the Brisbane 
4 ‘Schists. 7 ’ The specimen was collected personally by Dr. Bryan on 
20th September, 1944, when, accompanied by Mr. 0. A. Jones, he led 
a party of senior students from the Department of Geology, University 
of Queensland, on a field excursion to Upper Brookfield. The site of 
the find is within the western limits of the Greater Brisbane area and 
is a road cutting in Portion 194, Parish Moggill, four-fifths of a mile 
south-east of Upper Brookfield school. Mr. 0. A. Jones in speaking 
on the exhibit stated that it can be confidently placed in the genus 
Diplograptus and possibly in the sub-genus OrtJwgraptus. He pointed 
out that as the fossil came from the horizon somewhere about the 
middle of the series, it suggested that a considerable portion of this 
thick series is Ordovician in age, that is, somewhat older than was 
previously thought. The only other graptolite recorded from Queens- 
land was found at Tweed Heads by Mr. A. K. Denmead in the upper 
part of the underlying Bunya Series. Although this is at a consider- 
ably lower horizon than the specimen exhibited, it also belonged to 
the Diplograptidae. 
Abstract of Proceedings, 30th October, 1944. 
The Ordinary Monthly Meeting of the Society was held in the 
Department of Geology of the University on Monday, 30th October, at 
8 p.m., with the President (Mr. F. A. Perkins) in the chair. Twenty- 
five members and friends were present. The minutes of the previous 
meeting were read and confirmed. Dr. Alan Earnshaw was nominated 
for Ordinary Membership. 
Mr. C. T. White delivered the Tryon Memorial Lecture entitled 
“Henry Tryon and His Place in Queensland Science.” Henry Tryon 
was born in England in 1856 arid died at Brisbane in 1943. After a 
primary education at Sherwood and later as a medical student at the 
London University, he travelled to New Zealand. He came to Queens- 
land in 1882 and was appointed Assistant Director of the Queensland 
Museum in 1883. In 1894 he was appointed Government Entomologist 
at' ^tlle* Department of Agriculture and in 1901 became also Government 
