CARBONIFEROUS ROCKS OF THE SOUTHERN HEMISPHERE. 263 



'Nomenclature of tlie Carboniferous, Permo-Carboniferous, and 

 Permian Rocks of the Southern Hemisphere : — The Com- 

 mittee consisting of Professor T. W. Edgbworth 

 David (Chairman), Professor E. W. Skeats (Secretary), 

 Mr. W. S. Dun, Sir T. H. Holland, Mr. W. Howchin, 

 Mr. G. W. Lamplugh, and Professor W. G. Woolnough, 

 appointed to consider the above. 



Eepoet of THE Australian Members of the Committee. 



A TABLE (II.) of a suggested cx)rj?elation of these rocks and also the 

 following points were presented for discussion and report by the Hono- 

 rary Secretary, Professor E. W. Skeats, The University, Melbourne: 



1. Is a single name desirable for all Australian Permo-Carboniferous 



rocks? i.e., should we abandon local terms such as Bowen, 

 Gympie, Bacchus Marsh, &c. ? 



2. If so, or if a comprehensive name in addition to local names is 



desirable, should the name be a general one, i.e., Permo-Carboni- 

 ferous, Carbo-Permian, or Permian? 



3. If a local name be preferred, which name is most suitable? It has 



been suggested that since the Glacial series was first discovered by 

 Selwyn in the Inman Valley in South Australia they might be 

 called ' the Inman series ' or that a suitable aboriginal name from 

 that district might be chosen. If the latter, what is a suitable 

 name? 



4. Can we be certain that the prominent Glacial Conglomerate is 



always on the same geological horizon, i.e., is it everywhere con- 

 temporaneous ? The presence of two or more Glacial Conglomer- 

 ates in Victoria and New South Wales suggests a repetition of 

 Glacial conditions not necessarily with the same time-interval 

 between them, since at Bacchus Marsh in Victoria several con- 

 glomerates are intercalated among the shales and sandstones of 

 the one series, while in New South Wales the Lower Marine 

 prominent Glacial horizon is followed by the Greta series, and 

 then Glacial boulders recur in the Upper Marine series. In other 

 areas in Victoria, New South Wales, South Austraha, &c., where 

 a Glacial bed rests unconformably on older rocks and is not con- 

 formably overlain by fossiliferous rocks, we have no stratigraphical 

 or palseontological guide and commonly assume, and are unable to 

 demonstrate, that these widely separated occurrences are on the 

 same horizon as those of Bacchus Marsh in Victoria and the 

 Hunter Eiver in New South Wales. Are we safe in making this 

 assumption? 



