Vol. 58.] AMONG THE JURASSIC ROCKS OF SUTHERLAND. 292 
made. No river need have brought the fragments from afar—their 
source may be here at hand. 
We see in this mass a kind of sea-stack, standing on a broader 
rocky base at no great distance below. It is a Jurassic ‘Old Man 
of Hoy’ or ‘ Duncansby Stack,’ but with its stratification vertical, 
Fig. 2.—Interbedded breccia-beds at the entrance to Gartymore Burn, 
separated by thick bands of shale. 
[From a photograph. | 
therein resembling more closely the ‘ Needles’ off the Isle of Wight. 
Like all sea-stacks, it would stand not far from a lofty rocky shore— 
the cliffs being formed ofthe same material as the stack, that is, of 
the Caithness Flags. Now, such cliffs are actually near at hand, 
in the strip of these rocks discovered by Prof. Judd between the 
Upper Jurassic and the granite. Thus, if we could clear away the 
intervening Jurassic deposits, blocks and all, we should have here a 
relic of the Old Jurassic shore. Jt may have been up and down 
since then, but has finally settled only a little higher than in its 
original position. This cliff, where nearest to the sea-stack, about 
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