176 
Geology of Sydney. 
Tertiary 
Brown Coal or Lignite of Tertiary Age. A bed 
on the South Coast, near Merimbula. is 20ft 
in thickness. 
Thin seams of eotil occur in the Wianamatta 
Shales, and in beds of Mesozoic Age about 
Ballimore, on the Talbragar TUver. No 
Marine fossils are known, but fassil plants are 
abundant. Thinnfeldin and Tcenioptcris are 
characteristic, but Glossopteris is absent. 
The seams of coal worked at Newcastle 
belong to the Upper Coal Measures. 
The best known are, in descending 
order:— 1, Parbury’s Seam; 2, Great 
Northern Seam; 3, Burwood Seam ; i, 
Dirty Scam ; 5, Yard Seam : 0, Bore- 
hole Seam. Glossopteris abundant. 
The Dkmusky Series 2,000 feet in 
thickness separate these coal seams 
from the underlying Tom ago Coai 
M easures. 
Upper 
Coal 
Measures. 
Upper 
Marine 
Series 
The Upper Marine Beds are about 5,000 
feet in thickness. The following divisions 
are recognised in descending order : — 
1, Beds with Crinoids & Sunguinolites 
2, Beds with abundance of Spirifers 
3, Muree Kock. 4, Conglomerates. 
Lower Greta Coal Measures, with no 
Coal Marine Shells. Fossil plants 
| Measures. abundant. Glossopteris common 
Lower 
Marine 
Series 
The Lower Marine Series is 
about 2,000 feet in thickness 
jEuri/desma cor data is charac- 
teristic. 
Thin seams of inferior coal are known to occur in 
Carboniferous beds, but no scams of economic 
importance have been found. Carboniferous 
rocks are well developed in the Stroud district 
No Glossopteris is known but Hhacopteris and 
Lrpidodcndron are abundant. 
Fig. 44 ^Succession of Coal-bearing rocks in New youth Wales. 
