CXXII. IRRIGATION GEOLOGICALLY CONSIDERED. 
at Bulyeroi (60 miles west by south from Moree) and at 
Wallon (20 miles north by west from Moree) the character- 
istic Lower Cretaceous fossils were obtained in bores 
through the use of the Calyx drill, which has the advantage 
of bringing up a solid core. The evidence conveyed by 
these fossils is of particular interest as bearing upon the 
disputed question as to whether the Lower Cretaceous 
Sandstones (Blythesdale Braystone of Dr. Jack) or the 
underlying sandstones of Triassic age form the true intake 
beds of the artesian area. 
At Bulyeroi the Lower Cretaceous rocks were penetrated 
to a depth of 520 feet, and at 175 feet from the surface a 
very small supply of sub-artesian water was met with. 
Below 520 feet Triassic rocks with characteristic plant: 
remains were struck, and in them at a depth of 1,386 
feet from the surface the first supply of artesian water 
was found, equal to 6,000 gallons a day. Ata depth of 
2,370 feet the flow had increased to 1,750,000 gallons per 
day. 
At Wallon Bore the Lower Cretaceous rocks extended 
to a depth of 1,500 feet from the surface, and they yielded 
characteristic marine fossils such as Corimya, Maccoyella 
and Pinna. No water was obtained in these beds. At 
1,630 feet from the surface the characteristic Triassic’ fossil 
Toeniopteris Daintreei was recognised, and a coal seam 
15 inches thick was intersected at a depth of 1,650 feet. 
The first artesian water flowing at the rate of 400 gallons 
per day was not met with until the bore had reached a 
? Notre— Wherever the term Trias or Triassic is applied, in this paper, 
to rocks other than those of the Hawkesbury Series, it must be under- 
stood that the use of these terms is only provisional. It is quite possible 
that their age may eventually prove to be Jurassic, like that of the Vic- 
torian Series, and that of the Clarence Series of New South Wales as 
originally suggested by the late C. S. Wilkinson.—Min. Products N.S. 
Wales, 1882, p. 55. RHE, 
