ABSTRACT OF PROCEEDINGS, XXVil. 
The subject was discussed by Acting Professor CoTTON, 
Mr. W. R. BROWNE and Mr. W. T. WATKIN BROWN. 
Monthly Meeting, 11th September, 1918. 
Mr. R. H. CAMBAGE in the Chair. 
Ten members were present. 
EXHIBITS: 
1. Dr. C. ANDERSON:—(a) Wolfram, Butler Tin Mine; (b) 
Quartz crystals, Tingha, N.S.W. 
2. Mr. L. F. HARPER exhibited a number of specimens 
from the Hill Hnd district, N.S.W., and made remarks on 
the geology and the nature of the reefs. It is considered 
that rocks of two distinct geological periods are represented 
in this area, classified provisionally as Ordovician and 
Devonian. Type rocks of each age were shown, also a 
specimen of tuff-slate breccia representative of the contact 
zone between the two geological periods. According to 
Mr. HARPER, while there are undoubted saddie reefs in the 
Devonian, the principal auriferous reefs occur either as 
true bedded veins in the Ordovician rocks, or as irregular 
makes of quartz and calcite along the contact zone. Samples 
of each were exhibited, both showing gold freely. 
3. Mr. H. J. StaTHAM:—(a) Waterworn pebbles and (b) 
Aborigina] stone implements from near the Parramatta’ 
Reservoir, N.S.W. 
Mr. HK. J. STATHAM contributed a paper, ‘* The Shell 
Beach, Bellambi, N.S.W.”’ in which he gave an interesting 
account of the topography and history of the district. From 
the existence of a stratified shell and sand deposit on the 
foreshores, which covers an area of about five acres, and 
contains numerous shell remains, chiefly gastropods, Mr. 
STATHAM concludes that the sea must at one time have 
stood at a higher level, estimated to be twenty-six feet 
above present high water line when the last stratum of 
J I—December 4, 1918. 
