840 Transactions. — Geology. 



The particular case to which exception is taken, may be stated as fol- 

 lows : — Dr. von Haast submits " that it is even more than probable that 

 this large assemblage of beds," which to evade difficulties of survey he had 

 lumped as his Mount Torlesse formation, " may belong to several distinct 

 periods ranging from the palaeozoic to the lower mesozoic, but hitherto it 

 has been impossible to divide this formation, for the present at least, into 

 smaller groups owing to the want of fossils." Well, in the progress of the 

 Geological Survey, the requisite fossils have been found and the subdivision 

 made. Why should Dr. von Haast object ? 



Art. XLIII. — Analysis of Slate in contact with Granite from Preservation 

 Inlet, New Zealand. By A. Liversidge, F.E.S., Professor of Chemistry 

 and Mineralogy, University of Sydney. Communicated by Professor 

 F. W. Hutton. 



[Read before the Philosophical Institute of Canterbury, 27th November, 1884.] 

 Analysis of a specimen of slate and granite in contact was read before the 

 Otago Institute in November, 1877 (Trans. N.Z. Inst., 1877, p. 505). Since 

 then a further analysis of another portion of the slate has been made with 

 the following results : — 



Analysis. 



Hygroscopic moisture -480 



Silica 53-350 



Alumina 19-889 



Iron sesquioxide .. .. .. .. .. .. 2-294 



„ protoxide . . . . . . . . . . . . 5-241 



Manganese protoxide 1-522 • 



Lime .. 3-025 



Magnesia 5-060 



Potash 3-904 



Soda 3-652 



Undetermined, combined water, etc 1-583 



100-000 

 Specific gravity . . 2-72 



The above results, in common with the first analysis, show that on the 

 whole there is no very great similarity in composition between the granite 

 and slate, such as might be expected were the granite merely a meta- 

 morphosed or crystalline form of the slate ; it would rather appear that the 

 granite is distinctively intrusive, and not derived from the slate by meta- 

 morphic action, 



