A1>PEN UIX. 
NO. IV. 
197 
No. IV. 
List of Geological Specimens, collected in the distant 
Interior during the First Expedition, with their 
Localities and their relative Distances from each 
other. 
It may be necessary to observe that the height of the Cataract 
of the Macquarie River above the sea, was ascertained by baro- 
metrical admeasurement to be 650 feet. The country subse- 
quently traversed is considerably lower. The specimens refer 
only to the geological formation of the distant interior. 
Schorl Rock. — Colour blueish grey, finegrained, extremely hard. 
Composed of Tourmaline and Quartz. Forms the bed of 
the Macquarie at the Cataract, 75 miles to the N. W. of 
Wellington Valley. 
Decomposed Mica Slate. — Colour white; yields to the knife; ad- 
heres strongly to the tongue. 
Decomposed Feldspar. — Colour pale rose-pink; very fine grained; 
easily scratched with the knife; adheres strongly to the 
tongue. 
Both specimens immediately succeed the Schorl rock at 
the Cataract, in large smooth-sided masses. 
