630 CLEMENT LE NEVE-EOSTEK's NOTES ON HATTOE IRON-MINE. 



silicification. It is, however, possible that the apparently stratified 

 magnetite may have been formed by ferruginous emanations, which 

 accompanied or followed the granitic intrusion, and spread out be- 

 tween the planes of bedding of the Carboniferous strata. The pre- 

 sence of actinolite and garnets, which I believe almost invariably 

 accompany deposits of magnetite, may be explained under either 

 hypothesis ; these minerals were probably formed by metamorphic 

 action out of the surrounding rocks, the ore furnishing the iron 

 which enters into their composition. 



The outcrop of these beds of magnetite may be traced eastwards 

 for a distance of about three quarters of a mile. Near the surface 

 the magnetite has been converted into ochre from the action of 

 atmospheric agencies ; and the outcrop has been worked for that 

 substance. 



In addition to the actinolite, garnets, axinite (?), and a little iron- 

 pyrites, I also found chalcedony and crystallized chalybite occurring 

 with the magnetite. A little fluor-spar seen on one of the rubbish 

 heaps was probably derived from a small vein. I was not fortunate 

 enough to obtain any haytorite. 



