XXXll. ABSTRACT OF PROCEEDINGS. 
geologists, that Glossopteris died out absolutely with the top coal 
seam of the New South Wales Permo-Carboniferous beds. Bearing 
this in mind, and in view of the conflicting evidence obtained in 
the Balmain shaft, we are compelled to accept one of two theories, 
either : 
1. Conditions were favourable in the central portion of our 
Permo-Carboniferous basin for the survival of Glossopteris 
above the Bulli coal seam horizon. 
2. The coal seam now being worked under Sydney Harbour is 
on a lower horizon, and is overlain by Permo-Carboniferous 
strata devoid of coal seams. ) 
Any one of the points raised, if considered alone, may have no 
significance, but are we justified in ignoring the evidence as a 
whole? The writer is inclined to favour the possibility of the 
Sydney Harbour coal seam being on a lower horizon than the 
Bulli seam, possibly No. 2 or No. 3, and is of the opinion that 
whilst Permo-Carboniferous sedimentation continued in the central 
portion of the basin, conditions were not favourable for the form- 
ation of a coal seam during its closing phases. 
The question was discussed by Messrs. PITTMAN, ATKIN- 
son, CARNE, DuN, and Professor DavibD, and replied to by 
Mr. HARPER. 
Monthly Meeting, 11th November, 1914. 
Prof. T. W. E. DAVID in the Chair. 
Twelve members and six visitors were present. 
Professor DAVID made some remarks in further discussion 
of Mr. L. F. HARPER’S paper on the coal seams of the 
Southern Coal Field read at the previous meeting. 
1. Mr. C. A. SussMILCH exibited specimens of contorted 
strata from Seaham, associated with thin bedded acidic 
tuffs, dipping at 18°, the series being unfolded; a local 
occurrence. 
