STATHER : A GLACIATED SURFACE AT FILEY. 347 
Numerous instances of well-marked terminal curvature and 
superficial contortion of the solid strata, undoubtedly due to glacial 
action, have been noted on the Yorkshire coast, and recorded by 
many geologists ; this evidence confirming that of the strijB, as 
regards the direction of the movement of the ice. 
To the above examples we are now able to add a further 
instance, on a more extended scale, in the vicinity of those 
already described, near Filey Brigg. The surface described by 
Mr. Lamplugh is rarely visible, being usually hidden under slip 
from the high cliff of drift above it. But on the other side of 
SCALE 
lonf^ 3000 4*000 ftM^ 
the promontory (see plates LII., LIV., and LY.), I have found that 
the prolongation of the same rock surface in that direction, as 
seen in the ledge of rock above the picturesque shallow caves 
known as the " Doodles," is distinctly glaciated over a considerable 
extent. The irregular concretionary knobs, which stand up above 
the general plane of bedding, perhaps show the markings the best ; 
but they can also be traced more or less clearly along the rocky 
ledge immediately below the drift, for a distance of at least 
400 yards. 
A group of striae is visible near the western end of the 
glaciated surface, immediately east of the Spa Nab (plate LIV.); and 
