OBIGIN AND DEVELOPMENT OF ORE-DEPOSITS. 293 



Wheal Devonshire, Carn lode. 

 Wheal Prudeace, North lode. 

 East Crofty, Longclose lode. 

 Tincroft, High-burrow lode. 



„ Dunkin's lode. 

 Dolcoath, Main lode. 



,, Harriett's lode. 



South Crofty, Pryce's lode. 

 North Eoskear, South lode. 

 United Mines, Bawden's South lode. 

 ,, NichoUs' branch. 



,, Mundic or Buzza's lode. 



Old lode. 

 Consolidated Mines, Glover's lode. 

 Wheal Buller and Beauchamp, South lode. 

 Tresavean lode. 

 Fowey Consols, Jefifery's lode. 



,, Black's lode. 



Marke Valley, Old Sarum lode. 



,, Marke lode. 



Gunnislake Clitters, main lode. 

 Devon Consols, main lode. 



Class IX. — Older Cross-courses and Flucans. 



These generally contain an abundance of quartz, often 

 mingled with clay in parts of their courses, and very frequently 

 with ores of lead. Sometimes the lead is accompanied by ores 

 of copper either intimately mixed or forming distinct bands or 

 pockets. Chalybite is also a very common component. 



It is doubtful whether any of the N.S. faults to the east of 

 Dartmoor can properly be referred to this period, except the 

 important group which has been somewhat extensively worked 

 for lead ore barytes and carbonate of iron at Christow, Frank 

 Mills, and South Exmouth, in the valley of the Teign. The 

 principal fissure in this group has been traced along the valley 

 of the Teign for five or six miles in a direction a few degrees of 

 north, and is nearly coincident in its northern extension with the 

 little tributary which enters the Teign at Lea Cross. 



At Hsington and Henuock, near Haytor, several iron- 

 bearing cross-courses are known which course a little to the 



