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; showing in large blocks on the sides of the hills.
Slaty Quartz, with varieties.—Found with the quartz rock, in a state of decomposition.
Granite.—Succeeds the serpentine, of light colour; feldspar decomposed; mica, glittering and silvery white.
Sandstone, Old Red.—Composition of the more distant ranges on the Morumbidgee. Forms abrupt precipices over the river flats; of sterile appearance, and covered with Banksias and scrub.
Mica Slate.—Colour dark brown, approaching red; mica glittering. The hills enclosing Pondebadgery Plain at the gorge of the valley of the Morumbidgee, are composed of this rock. They are succeeded by
Sandstone.—Which rises abruptly from the river in perpendicular cliffs, of 145 feet in height.
Jasper and Quartz.—Colour red and white. Forms the slope of the above sandstone, and may be considered the outermost of the rocks connected with the Eastern or Blue Mountain Ranges. It will be remembered that jasper and quartz were likewise found on a plain near the Darling River, precisely similar to the above, although occurring at so great a distance from each other.
Granite.—Light red colour; composition of a small isolated hill, to all appearance wholly unconnected with the neighbouring ranges. This specimen is very similar to that found in the bed of New-Year's Creek.