BY LEO A. COTTON. 



757 



included in a zone about 12 miles wide, extending from the 

 Land's End to Exeter, a distance of about 108 miles in an E.VV. 

 (mag.) direction." 



Mr. Skertchley has observed the same relation at the Queens- 

 land end of the New South Wales tin-belt. He states — "The 

 tin-belt at Stanthorpe has no relation to the present ranges; it 

 is neither parallel with the Herries nor the Dividing Range, and 

 indeed the ranges struck me as being axes of denudation rather 

 than of upheaval. The tin-belt is quite independent of them, 



and is in direct relation to the stress-axis which induces the 

 ^singularly persistent north-east and south-west joints and cleav- 



