CHAP. XXXIX 
THE PLATEAU OF THE FAROE ISLES 
259 
thickness, dark green in colour, and more or less distinct 
irregular concretions, and also pieces of wood Above ft I layei : com 
-mother thick overlying group of basalts (h) distmguis ) 
abundantly amygdaloidal character, and by their weathering into globulai 
forms which at a little distance give them a resenihiance to agglomerate ^^ 
We have here an intercalated group of strata upwards of 40 feet thick, 
consistiim partly of tuffs and partly of fine clays, which may either have 
been derived from volcanic explosions or from the atmospheric disintegration 
of basaltic lavas. Through some of these strata abundant carbonaceous 
streaks and other traces of plants are distributed, while among there ^lies 
hand almost wholly composed of compressed vegetation. Unfortunately 
none ofthe strata at tfiis locality seem to have preserved the plant- 
remains with sufficient definiteness for identification. There can be n 
doubt, however, that they were terrestrial forms like those of Mull and 
AUt This coal, with its accompanying sedimentary deposits, has been traced 
through Sudero, and another outcrop, possibly of the same horizon occu 
on Myggenaes, the extreme western member of the group of islands, 
distance of some 40 miles. 1 
1 See in particular Prof. J. Geikic, Trans. Roy. Soc. Edin. vol. xxx. (1880), p. 229. 
