Stratified Rocks near Killarney and Dublin. 171 



pie slate which there alternates with the chloritic quartz for 

 that rock. 



It appears to me to be extraordinary, that when arriving at 

 the conclusion that the chloritic rocks of Turk and Manger- 

 ton mountains were newer than the old red sandstone, owing 

 to the observed dip to the south both of the old red sand- 

 stone and the chloritic rocks, Mr. Hamilton did not (with 

 Mr. Weaver) consider these chloritic rocks to be superior to 

 the carboniferous limestone of Muckross and Turk. The 

 limestone beds all dip to the south towards the fault, and ap- 

 parently underlie the chloritic rocks; and as the limestone 

 strata rest upon the yellow and red sandstone, the natural 

 conclusion should have been, that the whole of the strata to 

 the south of the lakes of Killarney belonged to the millstone 

 grit, which we find resting on the same limestone to the north 

 of the lakes. Mr. Weaver carefully observed all these dips ; 

 and not having noticed the fault or unconformity of the strike 

 of the old red and limestone series on its north side with the 

 chloritic rocks on the south, and conceiving that the lime- 

 stone together with the old red sandstone belonged to the 

 transition series, he naturally concluded that the chloritic rock 

 to the south belonged to the same ; but Mr. Hamilton has 

 overlooked the southern dip of the limestone at the north- 

 ern base of Turk mountain east of Turk cottage, and placed 

 the chloritic rocks in a position in which they could not occur 

 according to the dips of the strata, namely, between the old 

 red sandstone and the carboniferous limestone series. 



I shall not pursue this subject, as I should hope that suffi- 

 cient data have been brought forward to prove that the strata 

 to the south of the Lake of Killarney, which Mr. Hamilton 

 considers to be Devonian, do really belong to the Silurian 

 system. 



I shall next allude to a paragraph in Mr. Hamilton's paper, 

 page 445, in which he states, " that among other localities 

 in which the yellow sandstone is laid down on the Geological 

 map in positions in vohicJi it does not exist, he may mention 

 the boundary of the carboniferous limestone, on the banks of 

 the River Roughty in the Valley of Kenmare." 



I wish Mr. Hamilton had mentioned the other instances 

 that came within his knowledge as well as this, as I have no 

 doubt I should have been equally well able to show that the 

 boundaries marked were founded on actual observation. 



In the present case I shall merely observe, that at Kilgawan, 

 on the north side of the valley of Kenmare, above Roughty 

 Bridge, yellow sandstone occurs in considerable thickness, 

 overlying red quartz rock, green and red clay slate, and red 



