ANNIVERSARY ADDRESS. 45 
4. Tomago (East Maitland) Series. 
5. Dempsey Beds. 
6. Newcastle Series. 
Probably only two are represented in the sections exposed in the 
Blue Mountains, viz., the Upper Marine series and the Newcastle 
series. This is perhaps due tothe fact that the Upper Marine 
series have overlapped, and so concealed from view, the Lower 
Marine series and the Greta Coal-measures, and the Newcastle 
series has overlapped the Dempsey Beds and Tomago series. The 
rocks of the Upper Marine series consist of basal conglomerates, 
sandstones, and mudstones ining marine Permo-Carboniferous 
fossils, and occasionally pyritous lisudetenel with large boulders 
up to four feet in diameter. The line of junction between this 
series and the overlying coal-measures of Lithgow ete., (Newcastle 
series) is marked by a bed of grit and conglomerate about fifty 
feet thick, which may be termed the “Capertee grits,” this has 
_ been referred to by Professor Stephens.’ Mr. J. E. Carne, of the 
Geological Survey of New South Wales has also referred to this 
well marked horizon.? 
The conglomeratie grit weathers out into over-hanging ledges 
and cave-like hollows, on the sides and floors of which efflorescences 
of alum, salt, epsomite, etc., are frequently observed. [t forms 
a conspicuous feature at the base of the western escarpment of 
the Blue Mountains from Bowenfels to beyond Capertee. Im- 
mediately overlying the Capertee Grit is the Lithgow Coal-seam, 
from one to ten feet in thickness, forming the principal seam 
worked in the district. This is succeeded by a seam of kerosene 
shale from a few inches to four feet in thickness, worked 
economically at Hartley Vale, Katoomba, and Capertee, from 
which it is separated by about forty to eighty feet of strata. The 
' Proc. Linn. Soc. N.S. Wales, Vol. v1, p. 550. 
2 Kecords Geo]. Surv. N.S. Wales, Vol. rv., pt. ii., pp. 39 - 48. By 
Authority, Sydney 1894. 
3 C. S. Wilkinson—Annual Report Department of Mines, 1877. Geol. 
‘Map, Hartley Bowenfels District, Note 26. By Authority, Sydney 1878. — 
