Porphyry with Feldspar.—Colour grey with red spots, similar to the last. Was not observed to affect the needle. Formation of Mount Foster. Mount Foster is more than 200 feet in height, and lies about 5 miles to the N.N.W. of Mount Harris. From the summit of both, Arbuthnot's range is visible, bearing nearly due east, distant 70 miles. (See page 28.)
Quartz Rock varieties—Slaty Quartz varieties.—Composition of the first elevations to the Westward of the marshes of the Macquarie, called New Year's Range, a group of five hills. The loftiest about 200 feet in elevation; distant about 80 miles to the N.W. of Mount Harris.
Granite.—Colour red, coarse-grained. Composed of Quartz, Feldspar, and Mica.
Illustration 6
A SELENITE.
CHRYSTALLIZED SULPHATE OF LIME.
Granite, Porphyritic.—Colour light red. Both occurring in the bed of New Year's Creek, traversing it obliquely, and are visible for a
few hundred yards only. This granite occurs about 16 miles from the Range in a N. by E. direction.
Old Red Sandstone.—Composition of Oxley's Table Land, 500 feet above the level of the plains. It is broken into two hills, that appear to have been separated by some convulsion. (See page 81.) It bears N.W. by W. from New Year's Range, distant 50 miles.