1ft 



The following sketch gives a vertical section of the beds, 

 with a rough estimate of their thickness : — 



Phyllites. 

 b"jrv^ZJ (?) 1,500 feet. 



mf^^MMf? , 



•| I I I I I I M 





Upper TorrensLimestone 



in Black Slates. 



200 feet. 



Phyllites and Quartzites. 

 > (?) 1,000 feet. 



Lower TorrensLimestone. 

 150 feet. 



Basal Grits, etc. 

 150 feet. 



Pre-Cambrian Massif. 



DESCRIPTION OF PLATE I. 



A Geological Sketch-map to illustrate the occurrence of the 

 Upper and Lower Torrens-limestones in the Type District. 



