Rie) Cc. F. LASERON. 
Nowra. They occur as low clifis, flanking the river from 
Nowra to the head of Longreach, and further to the west, 
capping Sugarloaf Mountain, and also the high range which 
lies to the north of the river above Yalwal Creek. At the 
latter locality they overlie the Edmondia sandstone, and 
consist of sandstones and grits showing current bedding. 
The only fossil found was a spirifer. Spirifer vespertilio 
was also found in this series on the summit of Sugarloaf. 
Above Nowra, current bedding is well exhibited, but the 
series here is chiefly remarkable for the uniformity of its 
jointing. Two series of joints are generally developed, 
their directions on the surface being north and south, and 
east and west respectively. But whereas the east and west 
joints are perfectly perpendicular, the north and south ones 
invariably incline to the east at an angle of about 60°. 
This is noticeable even in the small cracks. The remark- 
able constancy of this angle is astonishing, and produces 
some very peculiar results in rock sculpture. 
Some distance back from the river the dipping of the 
joint planes has the effect of tipping enormous masses of 
sandstone into all sorts of queer positions. Lofty pinnacles 
of sandstone are separated by deep narrow cracks, and 
great isolated blocks lean one against the other, producing 
deep fissures and caves. The country is covered with a 
dense brush vegetation, while orchids and creepers cover 
the rocks and trees, and combine to make a scene of the 
wildest confusion and magnificence. The current bedding 
of this series dips only in the one direction, that is to the 
east. The angle of dip of the false stratification is much 
lower than that of the joint planes, but the unvarying 
direction of the two would seem to have some connection. 
These characters persist from Nowra to Longreach, and 
evidently denote a shallow sea with a perpetual strong 
current from the west or south-west. The series as a 
8 
" 
Sn 
