698 
another, of the older Carboniferous beds. Somewhat similar 
rocks, to which a like explanation is applicable, occur in the 
Leicestershire Coal-field;* and a similar unconformity has 
been detected and described by Mr. Marcus Scott in the 
Coal-measures of Shropshire. *f* The problem of the age of 
the Red Rock of Rotherham is, however, by no means 
solved, and it is one to which local observers will do well to 
turn their attention.^ 
I have now laid before you a catalogue of bare facts ; 
time will not allow of my going into the question of the 
method of formation of the beds we have reviewed ; but this 
subject I hope to be allowed to discuss with the Society at 
some future day. 
* The Geology of the Leicestershire Coal-field (Memoirs of the Geological Survey 
of Great Britain), p. 56. 
t Quarterly Journal of the Geological Society of London, vol. xvii., p. 457. 
% The reader may also consult Horizontal Section of the Geological Surrey of 
Great Britain, sheet 69; and the pamphlet explaining it. 
EDWARD BAINES AND SONS, PRINTERS, LEEDS, 
