26 PROCEEDINGS OF SOCIETIES. 



marc, where a junction is seen between the limestone and the black 

 slates and shales beneath. Passing from thence, we cross over a low, 

 undulating country, formed by these contortions in the limestone and 

 the rocks immediately beneath them, till we come to this last undula- 

 tion, in which the limestone is seen to dip south at the Owbeg river r 

 from thence we have an almost unbroken section of rocks seen up the 

 Owbeg river to Carrigagreenane, the northern end. Commencing at the 

 limestone at the Owbeg river, we find, in descending order, the following 

 thickness of rocks: — First, about 200 feet of blue and gray crystalline 

 limestone; then about 120 feet of blue and black shales and slates, the 

 upper portion being very calcareous or fossiliferous ; again, about 100 

 feet of gray and yellowish-gray grits, with gray gritty slates ; then about 

 3000 feet of dark purple slates and grits, alternating evenly, grits pre- 

 dominating ; then about 1800 feet of greenish- gray grits and slate 

 bands, with thin bands of purple slate and conglomerates in the lower 

 beds, pebbles of white quartz and jasper being common ; beneath these 

 again we have about 1400 feet here; but the thickness of these beds is 

 much greater, as on the southern side of the section, where they average 

 2100 feet; then we have here a tolerably clear section from the lime- 

 stone at the Owbeg river, where we start from carboniferous limestone, 

 to Carrigagreenane, two miles up northwards, showing a total thick- 

 ness of 6200 feet of rocks, which seem to be all conformable to the 

 limestone. This section can be checked over and over again north-east- 

 wards and westwards, and will be found to coincide with the others in 

 making this thickness; and I do not think this to be the total thickness 

 of the rocks beneath the limestone in this district, for further south 

 towards Slugmuffe Hills I found these lower beds of greenish-gray grits 

 to have beneath them again another band of purple slates and grits ; 

 but the rocks are so much contorted, that the same beds recur and dip 

 again into Eantry Bay. 



The Rev. Professor Haughton said the survey of Mr. Willson had 

 been made in the same district which had been visited by him some years 

 ago, and that his sections, which had been published in the Journal of 

 the Society, were somewhat less detailed, in consequence of his survey 

 having been made more in reference to the metallurgical character of 

 the district. He had found that the copper was all confined to the slate, 

 and the lead to the limestone formation ; but in every case the lodes 

 coincided with the strike of the strata, as also with the dip. In this 

 they were similar to the Mansfield mines, which were worked like beds 

 of coal, the copper being found in horizontal beds instead of in fissures 

 and cracks, as was usually the case. He did not think these copper beds 

 were ever likely to prove remunerative in an industrial point of view, 

 but to a geologist they were highly interesting, and they were much 

 indebted to Mr. Willson for his valuable paper. 



Captain C. P. Molony, Madras Army, then read the following 

 notice of — 



