53 
similar nature to the rocks now existing in the granitic and 
syenitic district of Birker Moor, about Devoke Water and 
Wastwater, there is little doubt that they came from that 
locality, lying, as it does, nearly south, in the direction 
indicated by the striations. Several veins of hematite ore 
are exposed upon this polished surface, as shown in the 
sketch. 
Sketch of Limestone Surface at Aldby Quarry. 
A. Fissured Limestone after removing the Till. 
B. Eroded Surface. 
C. Yein of Ore. 
D. Boulders of G-ranite, Syenite, &c. 
The quarry presents a very fine section of limestone rock 
from its eastern escarpments towards the Ehen valley to 
its junction with the lower coal measures, at the westerly 
corner of the quarry, and from 50 to 70 feet in height. 
The limestone beds are much contorted and intersected by 
faults, showing a very disturbed and irregular stratification. 
The easterly escarpment, sloping towards the river Ehen, 
