Page:A sketch of the physical structure of Australia.djvu/52

40 Murrumbidgee and Murray rivers. Station Peak about fifteen miles north of Geelong, is, I believe, composed of granite. Mount Macedon still farther north; is said by Sir T. Mitchell to be sienite. N.N.W. of that, is Mount Byng, near latitude 37&deg; and longitude 144&deg;, which the same traveller describes as granite, as well as the range of Mount Hope and Mount Pyramid, sixty miles still farther north. He mentions clay slate on the banks of the river Campaspe in that neighbourhood, but he then speaks of nothing but granite with occasionally clay slate and quartz rock in the country to the N.E., till we reach the upper part of the Murrumbidgee River. For instance,—he describes the banks of the Barnard River as granite partly covered by trap, beyond which is clay slate and conglomerate, granite at the Swampy River, granite hills beyond the Ovens River,—granite at Mount Ochtertyre, on the banks of the Murray,—first range beyond the Murray granite. Mount Trafalgar, sienite, with clay slate and quartz rock, Burnett's range, granite. He then states, that in all the country where the Jugion Creek, the Dumott River, and the Coodradigbee Rivers fall into the Murrumbidgee, the higher country is composed of granite, the lower of limestone full of fossils, which he calls Silurian, and mentions favosites, stromatopora, heliopora pyriformis, and stems of crinoidea. From his descriptions, these palæozoic rocks with sandstone, "like that of the coal measures," seems to stretch