372 APPENDIX. No. IV. 



No. IV. 



GEOLOGICAL ACCOUNT OP THE ARCTIC ARCHIPELAGO, 



DRAWN UP PKINCIPALLT FROM THE SPECIMENS COLLECTED BY 



Captain F. L. M'Clintock, R.N., 

 Prom 1849 to 1859. 



^ '*^ 



BY THE REV. SAMUEL HAUGHTON, F.R.S., -^ '""^J- 



Fellow of Trinity College, Professor of Geology in the University of Dublin, and 

 President of the Geological Society of Dublin. 



The map wliich accompanies this geological descrip- 

 tion is arranged from the specimens brought home by 

 Captain F. L. M'Clintock, E.N., from the four Arctic 

 Expeditions in which he served from 1848 to 1859. These 

 specimens are all deposited in the Museum of the Koyal 

 Dublin Society, and form a more extensive and better 

 collection of Arctic rocks and fossils than is to be found 

 in any other museum in Europe. 



It will be most convenient to describe the geology of 

 the Arctic Islands by the formations which are to be 

 found there, which are the following : — 



1. The Granitic and Granitoid Eocks. 



2. The Upper Silurian Eocks. 



3. The Carboniferous Eocks. 



4. The Lias Eocks, 



6. The Superficial Deposits. 



I shall describe these successive formations briefly, 

 and add a few remarks of a theoretical character, to 

 indicate the important inferences which may be drawn 

 from the facts respecting them made known to us by 

 M'Clintock's discoveries. 



