Vol. XIV.] [Part III. 
PROCEEDINGS 
OF THE 
YORKSHIRE 
GEOLOGICAL AND POLYTECHNIC SOCIETY. 
. Edited by W. LOWER CARTER, M.A., F.G.S., 
AND WILLIAM CASH, F.G.S. 
INGLEBOROUGH. 
PART 11.'''" STRATIGRAPHY. 
BY PROFESSOR T. McKENXY HUGHES, M.A., F.R.S., F.G.S., WOODWARDIAN 
PROFESSOR OF GEOLOGY IN THE UNIVERSITY OF CAMBRIDGE. 
The oldest rocks of which we have any representatives in this 
area are the great mass of green slates and grit and conglomerate 
which form the floor of Chapel-le-dale, and of Ribblesdale for 
about half a square mile near Horton. These so much resemble 
the old volcanic series described under the general title of "Green 
Slates and Porphyry " in the Lake District, and agree so well 
with them in their relation to the rocks with which they are 
associated, that, in default of any evidence to the contrary, they 
have been referred to the same horizon. 
* Continued from Proc. Yorks. Geol. and Poly tec. Soc, Vol. XIV., p. 150. 
