396 Edicard T. Hardman — On HcemaUte in Tyrone. 



the side of the rivulet Lishan, not far from Lough Neagh/' — although 

 he classes it with the ordinary clay-ironstones, which it certainly 

 does not resemble either in composition or appearance.^ 



It is found at a place called Cove Bridge, near Lissan, in the town- 

 lands of Unagh and Tullycall, about two miles north-west of Cooks- 

 town. Here there are numerous traces of old workings, and in the 

 rivulet which separates the townlands, as well as in various quarries 

 and rock. exposures hard by, sufficient evidence is to be had to enable 

 one to determine with tolerable exactness the position and mode of 

 occurrence of this singular deposit. The section shows a succession 

 of beds of coarse and fine, yellow, purple, and reddish sandstones 

 and grits, — -passing into quartzose conglomerate, — interstratified 

 with variously-coloured sandy and clayey ferruginous shales, and 

 several limestones, marbly and dolomitic, closely resembling some 

 of the Armagh beds. In the shales are hollow nodules of 

 haematite, sometimes very sparingly distributed, but in at least one 

 bed very abundant. This bed, I am informed by the men who had 

 proved it, — for it does not appear at surface, — is 4 ft. 6 in. thick, the 

 shale, which is itself highly ferruginous, being crammed with 

 nodules, and it has been worked to some little extent. Two pits 

 were opened on it about eighteen months ago ; but, as in all mines 

 of this kind, they were found difficult to keep in order, and therefore 

 dangerous to work, and the miners took fright and gave up the 

 attempt. 



The following is a section of the strata in which the ore lies, 

 compiled partly from information and partly from my own observa- 

 tion, commencing at the top with the beds passed through in the 

 pits above referred to. (See Sketch Section, p. 401.) 



Section neab. Cove Bridge. 



Feet in. 

 11 Drift, etc., and \ 



'10 Shale (a couple of feet thick) with some haematite > about - 55 

 nodules - - - - - - -) 



9 Coarse rotten sandstone - - - - - - -30 



8 Eed clayey ferruginous shale, full of haematite nodules. ) 4^ ^ 



(Workable bed.) | * o 



7 Whitish sandstone, about ------- 



■{ 6 Hard reddish quartzose conglomerate (calcareous) 



5 Rotten yellow decomposed clayey sandstone - - - 



4 Reddish shale, with haematite nodules . - . - 



3 Yellow and brown sandy clay, with occasional haematite 



^ nodules --------- 



^ 2 Purple, grey, and marbly massive limestone . - - 



1 White, yellow, and purple coarse grits and sandstones, \ 

 [^ streaked. Thickness not seen - - - - - j 



79 



It is probable that over these, other workable beds of ore must 

 exist, because the mass of old workings are some distance to the dip 



^ It is also referred to by Sir Richard GrifEth in his Catalogue of Fossil and 

 Mining Localities, Journ. Geol. Soc. Dublin, vol. ix., and its position marked on his 

 Map ; and it is mentioned in Portlock's " Geological Report on Londonderry," etc. ; 

 but, so far as I am aware, has never been described before. 



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