740 



THE TIN-DEPOSITS OF NEW ENGLAND, N.S.W., I., 



From these considerations, then, it is highly probable that the 

 granites are of Permian age. 



The Basalts present clear evidence of Tertiary age. At 

 Elsmore there is, interbedded with the basalts, a bed of clay-iron- 

 stone, in which abundant plant-remains are to be found. This 

 bed may be traced some three miles both to the north and east of 

 Elsmore. Numerous aneroid determinations indicate that this 

 horizon preserves a constant level, and the inference is that it 

 was formed as a swamp or lake-deposit. The forms collected 

 were kindly identified by Mr. AV. S. Dun, and proved to be 

 Cinnamomum sp., Artocarjndium Gregorii Ett., Quercus (?) cf. 

 Darvnnii 'Ettt. ^Cinnamomum sp., a leaf like Ettingshausen's J.//<?ks 

 Cinnamomum cf. polymoi'phoides McCoy, Carpolithes, Cinna- 

 momum 2)olymorphoides, and (?) Ettingshausen's Eucaly2?tus. 



Another collection of fossil leaves from the Elsmore Valley 

 Deep Lead, some 300 feet lower than the horizon above- 

 mentioned, was also examined by Mr. Dun. The following forms 

 were determined — Banksia myricctfolia Ett., Cinnamomum 

 Leichhardtii Ett., Eucalyjjtus Diemenii Ett., Cinnamomum (?J, 

 Ficus ("t), Dryandra 'prceformosa Ett., and Ficus cf. Phillipsii 

 Ett. Similar fossil leaves and Unio shells were collected from 

 Elsmore some years ago b}' Mr. Wilkinson, and these were 

 identified as belonging to the late Tertiary period. 



A consideration of the foregoing facts has led to the following 

 classification, in which the positions assigned to the various 

 formations have been determined by their relations to the slates, 

 granites, and basalts. 



Recent 



Tertiary 



Palaeozoic 



Undetermined 



.. Allvuials^ 



{Basalts 

 Calcareous and 

 Siliceous Deposits 

 ( Dykes 

 Permian ... -I The "Acid Granite" 



(The Tingha Granite 



Silurian ... ... Slates and Claystones- 



(Quartz-Porphyry 

 Felspar-Porphyry 

 Quartz Orthoclase Porphyry 



