Geology 



feet of coarse " Millstone Grit," which formed the flat 

 tops of the hills. 



The talus heaps that occurred at the foot of each 

 of the terraces of which the hillsides were made up, con- 

 contained many fossils, including the large brachiopod 

 Productus giganteus and many very beautiful masses of 

 coral, while from the shales below the unconformity we 

 were able to obtain a few somewhat obscure graptolites 

 of the simple types found in the Silurian, thus confirming 

 our previous views as to the age of the shales. 



154 



