E. F. PITTMAN AND T. W. E. DAVID. CXIII. 
have been geologically surveyed by Messrs. R.L. Jack, F.G.s. 
and A. G. Maitland, F.a.s. According to their maps, the 
outcrop area of these beds is nearly 10,000 square miles. 
Theystate that the maximum altitude which these beds have 
been observed to attain, viz. Forrest Vale on the Maranoa 
River is 1,700 feet above the sea. It is necessary, how- 
ever to point out that in Queensland the Older Triassic 
rocks (which have been proved beyond doubt to be in New 
South Wales the rocks from which the artesian water is 
obtained) occupy considerable areas to the east of the 
Blythesdale Braystones, and may probably attain higher 
altitudes than the latter. 
Towards the sources of the Flinders River and its eastern 
tributaries Mr. Maitland’ found that what he considered 
to be the Blythesdale Braystone had been eroded into narrow 
Canons, several hundred feet deep as at White Mountain 
Creek. Mr. Rands,’ however, as the result of an earlier 
examination of these beds, considered them to belong to 
the Desert Sandstone horizon (Upper Cretaceous). In 
Queensland the Desert Sandstone is much more extensively 
developed as regards area and thickness than it is in New 
South Wales. Dr. Jack states that the Desert Sandstone 
is sufficiently porous in places to form a storage bed for 
rain-water, so as to act asa feeder to the underlying intake 
beds. Numerous mound (mud) springs are described as 
occurring in the Queensland artesian area. One of the 
most remarkable groups is situated near Mount Browne, 
in 20°S. Lat. near the Flinders River. Mr. EH. Palmer,M.1.a., 
who has described them,’ gives the temperature of the 
water flowing from them as 120° Fahr. 
+The Delimitation of the Artesian Water Area North of Hughenden, 
by A. G. Maitiand, Assistant Geologist—Queensland Parliamentary 
Paper, 1898, p. 4. 
? The Cape River Gold-field, by W. H. Rands, Brisbane.—By authority 
1891, p. 11. 
3 Proc. Roy. Soc. Queensland, Vol. 1., pt. 1, 1884, p. 20. 
8—July 20, 1903, 
