590 MESSES. S. H. REYNOLDS AND C. I. GARDINER [Nov. 1 896, 



Fig. 2. — Map of the Central portion of the Kildare Inlier. 



iuLiljJluHts of Grangecl 

 i\/muMM.Red Shales of Dunmurry. 

 *" Ifffgnwl Black Shales of Dunmurry. 



qrits Sf Shales of Grange Hill lying p-*^~1 Tuff or AsK 



Middle Bala Limestones of the Chair. I^V-U.1 Lava of 



[Grange Hill 

 Grits £,- Slates lying lelow the Ash 0/ 



xnge Hill. 

 Porphyritic basalt of Grauge Hill 



[Scale : 3 inches = 1 mile.] 



Note. — The numbers when unaccompanied by dip-arrows indicate spots referred to in 

 the text or from which specimens thus numbered, and now in the Woodwardian 

 Museum, Cambridge, were obtained. 

 Drift covei*s the westerly extension of the igneous rocks from Grange Hill. 

 For ' Dunmurry ' in the explanation, read ' Dunmurry Hill.' 



The top of the hill is formed of igneous rocks, basic and inter- 

 mediate in character, and these, as shown in fig. 3, are overlain by 

 olive -green grits and gritty shales yielding no fossils except an 

 obscure Orthis. No alteration can be detected either in the grits 



Fig. 3. — Section 2 on Map. 



Grange Hill 

 House. 



G-range 

 Hill. 



Jforphvritic Shales and Carbon^. . 

 Ha'ialt Grits Limest.overlai 



by Drift 



[Horizontal scale : 6 inches — 1 mile. Vertical scale exaggerated.] 



