Mr. Weaver on the Geological Relations of the South of Ireland. 19 



past Carrigtohill and Cork to Castlemore on the west. In this range the lime- 

 stone, after reaching- the upper part of Cork harbour, occupies the smaller 

 islands in that quarter, together with the northern points of Cove Island, thence 

 pursues its western course on the south side of the Lee to the confluence of 

 that river with the Bride, then lines both banks of the latter stream for a short 

 distance, while the remainder of its course is confined to the right bank, ter- 

 minating at about a quarter of a mile to the west of Castlemore Castle, or 

 nearly fifteen miles west from Cork. This band in its broadest part, on the 

 east, is between four and five miles wide, while at Castlemore, on the west, it 

 is reduced to about half a mile in breadth. Planked throughout by hilly ranges 

 of slaty and greywacke rocks, the general dip is to the south, varying chiefly 

 between angles of 70° and 80°, yet often approaching the vertical, and in some 

 parts exhibiting a counterdip to the north. These relations may be distinctly 

 observed, in traversing the bounding slaty rocks and the limestone from north 

 to south, in different portions of the range, both to the east and the west of 

 Cork harbour. The limestone is generally light-coloured and continuous, 

 free from foreign beds, and the few organic remains I have seen in it were 

 chiefly crinoidal. 



(30.) A similar arrangement is observable in the parallel band of limestone, 

 which, proceeding from the sea on the east, passes through the vale of Cloyne 

 to Cork harbour, where itoccupies the northern part of Spike Island, the south- 

 western point of Cove Island, the whole of Rocky Island, and the isles of Haul- 

 bowHne and Rinniskiddy ; thence passing to the main land, it composes the 

 projecting points of the coast as well as the strand of Rinniskiddy village, 

 and proceeding west, it passes by Shanavally and Hawksglen to Shannon 

 Park*. The interlamination of this band of limestone on its southern side, 

 with the adjacent clayslate of Rinniskiddy hill, is distinctly seen in the rocks 

 upon the strand, all approaching the vertical position, yet dipping south. The 

 great body of Rinniskiddy hill is composed of clayslate, corresponding with 

 the southern part of Spike Island ; but in passing round the former along the 

 strand, we find toward its southern side, the slate containing, at considerable 

 intervals, discontinuous layers of limestone, each a quarter or half an inch 

 wide. Further south these beds become more frequent and thicker, until they 

 exceed those of the clayslate in dimensions and number, and in the more 

 southern portion of the hill are nearly continuous. We have thus entered 

 upon another parallel band of limestone, which ascends about halfway up the 

 southern face of Rinniskiddy hill, and occupies the flat of the inlet below, 

 ranging to the westward by Coolmore to Carrigohne; and to the eastward it 

 * The scale of the Map does not permit the whole of these places to be laid down. 



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