From this centre of volcanic action a great number of dykes 

 radiate, the one we are discussing even penetrating this district. 



The isle of Skye is also a ruined volcano, estimated by Professor 

 Judd to have reached a height of from 12,000 to 15,000 feet, and 

 must hg,ve been comparable to Etna or the peak of Teneriffe. 



Faroe isles and Iceland are part of the same system of plutonic 

 action, and were most probably all in activity concurrently. The 

 period of this eruptive action will now be discussed. 



Because aqueous rocks of the carboniferous age, containing 

 Lepidodendron and Calamites, have been detected in the Sound of 

 Mull, near Ardtornish by Professor Judd, the volcanic rocks in that 

 neighbourhood are said to be probably of carboniferous age ; I 

 have visited the Sound of Mull and examined the rocks about 

 Ardtornish, and have found lias ammonites and Grypluea incurva, 

 and magnesian limestone covered over with vast sheets of lava. 

 Close by at Loch Aline cretaceous rocks are also so covered over. 



In fact, all the sedimentary rocks up to and including the 

 cretaceous have been burst through. The dyke here (Cleveland) 

 has penetrated into the oolite. The rock is therefore post-cretaceous. 



Text books (e.g. Page) tell us that these mountains were thrown 

 up in miocene times, and this statement has generally been accepted. 



However, Mr. J. Starkie Gardner, in his monograph published 

 by the Palseontographical Society, says " there is no physical 

 evidence against these volcanoes belonging to any part of that vast 

 period which intervened between the British white chalk and the 

 British eocenes, nor to any stage of the eocenes ; but they do pre- 

 sent evidence of such antiquity that we ought to hesitate to assign 

 them to any later period, unless very good reasons for doing so were 

 apparent. 



The plant evidence upon which they were classed as miocene has 

 always been of the weakest description ; and had geologists who 

 have written about them troubled to look into it independently, the 

 conclusion as to their age would never have been accepted." P. 79. 



Again " There is a total absence of evidence connecting them 

 (plants) with miocene." P. 80. 



According to Professor Phillips, miocene strata are believed not 

 to occur in the British Isles. 



