82 
THE SILURIAN ROCKS OF THE EASTERN MEN DIPS. 
in the middle of the quarry, band 3 is not well seen, and no sign 
of band 2 was found. On the other hand, in the western part of 
the quarry, though the rocks are very much crushed, a tuff-band is 
recognisable, and band 3 is well-seen. 
As far as is known at present the general succession of Silurian 
rocks in the Eastern Mendips is as follows : — 
r Mudstone often very fossiliferous, with 
subordinate bands of highly micaceous 
sandstone or grit exposed in the rail 
cuttings and by trenching in the fields to 
the S.E. of the Moon's Hill quarry. 
^Thickness about ... ... .. ... 120 ft. 
Pyroxene-andesite of Moon's Hill. 
Sunny Hill, and Downhead quarries. 
In each case some tuff is interbedded 
with the andesite. Thickness probably 
not less than ... ... ... ... 400ft. 
T Tuff coarse and fine exposed in Sunny 
? Llandovery^ Hill quarry and by trenching at Tadhill 
about 
1 10ft. seen 
