333 
Old Red shales and sandstone come in at the base of the cutting 
here and there, and lower down the finer grained beds of the 
Dolomitic Conglomerate appear again in a series of yellow 
clays and limestones. 
This section is not very rich in fossils, but to the strata- 
graphical Geologist, few, if any surpass it in the story which 
its study unfolds of the past history of our earth, and especially 
of the changes which have taken place since the deposition of 
the Carboniferous Limestone and that of the Keuper series 
which overlies it. What a vast lapse of time is here indicated! 
What has become of the thousands of feet of the Coal Measures 
proper, and many hundreds of feet of the Mesozoic beds ? 
Little, if nothing here to indicate their existence: a great deal 
however to tell a tale of complicated disturbances and enormous 
denudations ! 
