178 



Classijication of the Sedimentary S.ocJcs of Neiv South Wales * 



o 



' Post Tertiary 



L Tertiary 



Cretaceous . 



Jurassic 



3 ^ 



I Triassic 



Recent. Auriferous soils, and alluvial deposits in the 

 beds of existing rivers. 



Pleistocene. Alluvial leads containing gold, tin, and 

 ( gemstones. 



f Pliocene. Alluvial leads, frequently covered by basalt, 

 I and containing gold, tin, and gemstones. 

 I Miocene. Quartzites with plant remains at Dalton, 

 . ■{ near Gunning. 

 I Eocene. Marine limestones and calcareous sandstones 

 I of the Lower Darling ; plant beds of the New 

 L England District. 



f Upper Cretaceous (Desert Sandstone). Contains pre- 

 j cioiis opal deposits. 



I Middle Cretaceous. Auriferous alluvial leads at Mount 

 . -{ Brown. 

 I Lower Cretaceous (Rolling Downs Formation). Some 

 I of the beds are porous sandstones, and contain artesian 

 l_ water. 

 . Talbragar fish-bearing shales. 

 f ( Wianamatta shales (contain fire- 



Hawkesburj' series | clays). 



and their equiva- -j Hawkesbury sandstones (building 

 lants ... ... I stone). 



iNarrabeen shales. 

 fForm the base of the artesian 

 rm, T • u /-I T water basin. 

 The Ipswich Coal^ ^j^^^^ measures contain thin coal 



■■■ I seams, not at present worked 

 L in New South Wales. 



Measures 



f Permo-Car- 

 I boniferous. 



I Carboni- 

 ferous 



Devonian 

 I Silurian 



I 



f Upper or Newcastle ~^ 



Coal Measures ... 



Dempsey Series ... 



Middle or Tomago 



-{ Coal Measures ... [- 



Upper Marine Series I 



Greta Coal Measures I 



Lower Marine | 



I Series ... ...J 



fRhacopteris Beds'^ 

 I and associated 



-j Marine Beds. 



I Gympie claystones 

 L (of. Queensland) ... 

 f Upper Devonian ... 

 \ Lower Devonian ... 

 f Upper Silurian 

 [ Lower Silurian ... J 



The productive coal seams of 

 N. S. W. occur in these measures. 



All the metalliferous lodes and 

 reefs occur in the Silurian, 

 Devonian, and Carboniferous 

 formations, or in such igneous 

 rocks as granites, quartz-por- 

 phj^ries, felsites, and diorites. 



* From " The Mineral Resources of New South Wales," 1901. 



