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DR. F. H. HATCH AND MR. R. H. KASTALL ON [Nov. I9IO, 



and stated that he had no doubt ' that the calcareous matter of 

 which the marble was formed was deposited upon the granite' (op. cit. 

 p. 55), although the sections accompanying the paper appear to 

 indicate distinctly that the granite is of later age. Furthermore, the 

 two sections are inconsistent with each other — the one showing the 

 granite occurring as a sheet overlying the dolomite on Indwendwa 

 Hill, while the other shows the granite intruded into the marble 

 of Indwendwa Hill, as a bathylith. The same occurrence was 

 described in 1907 by Mr. William Anderson, 1 then Government 

 Geologist for Natal. This author considered that the marble 

 originated as a sedimentary deposit, and that by the intrusion of the 

 granite ' it has been converted into a very coarsely crystalline lime- 

 stone, consisting entirely of crystals of calcite ' (op. cit. pp. 111-12). 



II. Field-Relations oe the Dolomite. 



Mr. Anderson mapped the marble, and showed it as extending over 

 an irregular area measuring 9 to 10 square miles, and surrounded 



Fig. 1. — Geological map of the district around Port Shepstone. 



Ecca Shales 



D.wyka Conglomerate. .E^o] 



on all sides by granite. In all probability, however, the area is 

 larger than that indicated on Anderson's map : since, in the course 



1 Third & Final Beport of the Geological Survey of Natal & Zululand, 

 1907, p. 109. 



