RELICS OF THE PERMO-CARBONIFEROUS ICE AGE. 
21 
The Glacial Conglomerate in the Wooramel River. 
To the south of the Gascoyne is the Wooramel River, 
in which at about 130 miles from the coast the lowest beds 
of the Permo-Carboniferous Series are exposed. The 
valley of the Wooramel has not been very closely examined, 
though from a geological point of view it is perhaps one of 
the most interesting localities, since it is stated that a much 
better series of rock sections are exposed in its cliffs than 
in any other river in this portion of the State. 
The upper reaches of the Wooramel, between the 
Carandibbv Range and Bilung Pool, are composed of sandy 
shales, clay shales, sandstones, and limestones. These latter 
have yielded the following : — Alveolites obscurus, Hexago- 
nella crucialis, Hexagonetta dendroidea , Sienopora Tasman- 
ensis, Crinoid stems, Aulosleges Darac-oodensis , Orlhis cf. 
michelini, Productus suhquadratus, Cleiothyris (Atkvris) 
Macleayana, Cleiothyris ( Athyris ) Roysii. Dielasma, Spirifera 
convoluta, Spirifera lata, Spirifera Musakheylensis var. 
Australis, Spirifera trigonalis, Aviculopecten spp., Dello- 
pecleii ( aviculopecten ), Illawarrensis, Myalina spp., and 
Pleurophorus ( Pachydomus ) carinatus. 
Bilung Pool, at the head of the Wooramel, is a fine 
sheet of water formed by the stream falling over an almost 
horizontal bed of sandstone. Below the pool the water- 
course is hemmed in by low cliffs of a shaley conglomerate, 
which occasionally recede from the river to such an extent 
as to form large wide flats. Some of these are covered 
with large boulders derived from the disintegration of the 
conglomerate. Wherever the beds beneath the conglomerate 
are to be seen in the flats they are everywhere found to be 
composed of grey shales. 
About half-way between Bilung Pool and the junction 
of the Wooramel River, the creek breaches a whitish fel- 
spathic sandstone, which forms cliffs about 30 feet in height,; 
beneath this lies the conglomerate (Fig. 10, Plate VIII), 
to the disintegration of which in situ the “ boulder flats ” 
are in all probability due. 
Some of the boulders are of very large size and made 
up of rocks in every way identical with the older formations 
to the eastward. 
The stony tableland shown on all the maps as the 
Byroo Plains, and which is strewn with rounded boulders 
of quartz and crystalline rocks, probably owes its origin 
to the disintegration of the glacial boulder bed. 
These sections in the upper Wooramel show that the 
glacial horizon lies below the Productus Limestone in the 
same stratigraphical position as that on the Gascoyne and 
