LAW AND SIMPSON : DRIFT DEPOSITS AT MYTHOLMROYI). 235 
Vein Quartz 
Eskdale Granite 
0 
9 
Volcanic Ash ... 
Carboniferous Sandstones 
Chert 
Quartz Felsite ... 
•2 
1 
1 
Tliey were imbedded in a loamy, sandy matrix, and were 
found equally throughout the length and depth of the section, 
immediately after the grass and a few inches of surface soil 
had been removed. 
They lay at all angles and positions, and were so separated 
by the gravelly and sandy matrix that it was quite evident 
they were not stream laid. 
Some of the harder stones possessed flat soles, such as 
characterise glaciated stones, but no unmistakable striations 
were exhibited by any specimen. 
The far-travelled stones were well rounded and apparently 
water worn, the local galliards were more subangular. 
Mr. Simpson has not been able, on subsequent visits, to 
find any erratics exposed in the western part of the an^a or in 
the stream bed of Stubb Clough. Mr. Law, however, is quite 
clear that he and Mr. Saltonstall have found them all round the 
foot of the terrace. 
A careful search was made for erratics on the same contour 
level as the terrace, but a little further up Cragg Valley, but 
without success. 
It may be noted that to the west of the terrace beyond 
Stubb Clough the valley contracts considerably from both sides, 
and it is highly probable that it is to the projection thus of 
the hill sides we owe the preservation of these drift deposits. 
It is extremely difficult to account for tlie phenomena pre- 
sented by this drift, w4th its enclosed erratics, by any other 
theory than that it is the product of land ice which travelled 
and brought its debris from the western side of the Pennine 
Chain. The absence of bedding, the way in which the boulders 
