234 REPORT—1904. 
which would, if insufficiently rigid, be crushed and crumpled, and thus 
prepared for rapid erosion by the stream or river. So that whilst in the 
Hig. 2. 
ue. 
LE no 42 Grit. (Fig.t) 
Scales : Horizontal, 12 inches per mile. 
Vertical, 400 feet per inch. 
early stages the incipient valley induced the side-thrust of the hills, and 
the consequent ‘ crushing’ of the measures in the way indicated, the latter 
Fig. 3. 
has undoubtedly reacted by powerfully promoting the deepening of the 
valley. 
Fig. 4. 
E Nettlebank Pec 
Scale : 2 chains per inch. 
In the North Staffordshire Coalfield it was deemed desirable to find 
the outcrop of a rich marine bed known to exist about the horizon of the 
