1LX,*— Description of the Rocks which occur along a portion of the 
South Coast of the Isle of Mull, 
By the Right Hon. EARL COMPTON, 
(PRESIDENT OF THE GEOLOGICAL SOCIETY. 
[Read May 21, 1819.] 
The basaltic rocks of Carseg are, I believe, very little known, 
either to geologists, or to travellers in general. They are, however, 
well worthy of the attention of both, and it is chiefly with the 
hope of attracting the observation of some member of the society, 
more capable than myself of doing justice to the subject, that I am 
induced to draw up this brief account. 
I visited this remarkable coast last January, at a time very 
inauspicious for the purpose, not only on account of the shortness 
of the day, but also of the inclemency of the weather. In addition 
to these untoward circumstances, the impossibility of proceeding at 
that time in a boat rendered it necessary to walk a considerable 
distance over very rough and difficult paths. I had no means for 
accurately measuring angles or heights, nor for ascertaining the 
bearings of the compass, and these circumstances must plead my 
excuse for any inaccuracy on these points. 
The coast of Carseg lies on the south side of the Isle of Mull, 
one of the largest of the Hebrides. It is formed by high precipices, 
sometimes coming down nearly into the sea, and sometimes 
receding a little from it. About the middle of the most remarkable 
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