GLACIAL COMMITTEE. 243 



in diameter, TJiey are set in a dark-chocolate matrix, whose grains 

 are thoroughly angular. The lithological features of the formation 

 left no doubt whatever as to its glacial origin, and further search was 

 rewarded by the discovery of a large and beautifully striated boulder. . 



At the point known as Sebastopol, near Moparrabah, the relation- ' 

 ship of the glacial beds to the limestones is clearly demonstrated. 

 The limestones form imposing cliSs, several hundred feet in height, and 

 they rest directly on glacial conglomerates which continue to the 

 bottom of Tait's Creek, which runs round the base of the range. The 

 thickness of the glacial beds is considerable, and may be nearly 1,000 

 feet. In the type district of the Hunter River the Lower Marine 

 Glacial Beds are at the base of the Permo-Carboniferous System, but 

 in the Macleay area this is not so. Beneath them can be traced a very 

 extensive conformable series of tuffaceous sandstones well exposed 

 in Parabel Creek, one of the main tributaries of this part of the Macleay 

 River. The base of these tuffaceous beds has not been observed. 

 Between the Macleay and Manning Rivers we have an extensive 

 development of freshwater Trias-Jura (?) beds about Camden Haven 

 and Crowdy Head, and the Tertiary Basalt plateau of the Comboyne. 

 The Permo-Carboniferous beds re-appear round Tarree and Wingham, 

 on the Manning River, so that we have to deal, probably, with a very 

 important geosyncline. 



Near Tarvee there is a very extensive development of limestones, 

 partly marmorized, but containing abundant, Avell-preserved Aviculo- 

 pecten and crinoid remains. Just under the limestone, in the same 

 relative position as the glacial beds of Moparrabah, is a strong conglome- 

 rate, no doubt of the same mode of origin as its northern equivalent. 

 It has not been examined in detail, but it is well seen at the bridge 

 about 1 mile east of Tarree. North of Tarree, on the Cedar Party Creek 

 road, the limestones are strongly developed, and have been altered to 

 a very nice marble. A most interesting feature of them is the occur- 

 rence, in the pure limestone, of numerous small erratics. None that I saw 

 were more than a couple of inches in diameter, but their distribution 

 in little groups and bunches is reminiscent of the mode of occurrence 

 of similar small erratics in the Upper Marine glacial beds of the glen- 

 donite horizon of Huskison, Jervis Bay, New South Wales. This 

 association of glacial phenomena with well-developed limestones is 

 remarkable and interesting. 



A particular interest attaches to these two occurrences of glacial 

 beds on the New South Wales coast, as they are the furthest north yet 

 recognised in the State. 



In transmitting this note I may express the hope that, seeing that 

 my removal to Western Australia will prevent my continuing the work, 

 some one else will take up this extremely interesting area and work 

 out its detail. 



