49 
driven some 60ft. through the Mountain Limestone Shales and 
Millstone Grit. Since then it has been extended toa length of 
218ft., opening out at the E. end into a large quarry, now being 
actively worked. An addition of 38ft. 6in. of Grit must now be 
made to the 24ft. already shown, making a total of 62ft. 6in. 
altogether. The dip of these bedsis 46°. They are followed by 
Shales dipping from 46° S. to 60° N. and some 124ft. thick. Im- 
mediately outside the masonry of the Tunnel on the E. a thin seam 
of coal, 4in. thick, comes in, succeeded by a band of red rock, 6in. 
thick, with a N. dip of 60°, corresponding with that of the coal. 
Then follow a series of dark grey Limestones, so much disturbed 
that the dip is difficult to make out, succeeded by a dyke or 
infillmg of a peculiar pinkish streaked crystalline Limestone, 
standing up like a wedge in the middle of the quarry—the more 
profitable Limestone having been worked out on either side. 
‘The solid beds of Limestone have been excavated for a distance 
of 100ft., and then comes the furthest end of the workings, where 
the beds dip finally 45° E. The section is worthy of finding a 
permanent place in our “ Proceedings,” but whether it any way 
tends to unravel the complications connected with the Vobster 
disturbances, perhaps some member of the Club may be better 
able to decide than I can myself. 
On a Comparison of the Somerset Coal Field with the Coal 
Measures of Belgium and the North of France. By 
J. McMurtrig, F.G.S. 
(Read 12th February, 1890.) 
Most Geologists who have turned attention to the subject, 
have been impressed with the close resemblance which exists 
betiveen the Coal Measures of Somersetshire and those of 
D 
