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APPENDIX. NO. 1. 
Limestone, Transition.— Colour dark grey ; composes the bed of 
the Yass River, and apparently traverses the sandstone 
formation. Yass Plains lie 170 miles to the S. W. of 
Sydney. 
Sandstone, Old Red. — Again succeeds the limestone, and con- 
tinues to the N.W. to a considerable distance over a poor 
and scrubby country, covered for the most part with a 
dwarf species of Eucalyptus. 
Granite. — Colour grey; feldspar, black mica, and quartz; suc- 
ceeds the sandstone, and continues to the S.W. as far as 
the Morumbidgee River, over an open forest country 
broken into hill and dale. It is generally on these granite 
rocks that the best grazing is found. 
Greywacke.— Colour grey, of light hue, or dark, with black 
specks. Soft. — Composition of a part of the ranges that 
form the valley of the Morumbidgee. 
Serpentine.— Colour green of different shades, striped sulphur 
yellow ; slaty fracture, soft and greasy to the touch. 
Forms hills of moderate elevation, of peculiarly sharp 
spine, resting on quartz. Composition of most of the 
ranges opposite the Doomot River on the Morumbidgee, in 
lat. 35° 4' and long. 147° 40'. 
Quartz.— Colour snow-white; formation of the higher ranges on 
the left bank of the Morumbidgee, in the same latitude and 
longitude as above ; shewing in large blocks on the sides 
of the hills. 
Slaty Quartz, with varieties.— Found with the quartz rock, in 
a state of decomposition. 
