VOL. XIV. (2) GRAVEL AT MORETON II5 
end broke off with the fragment, enough to give the larger 
end of the flint the lighter specific gravity. 
The next point is under what conditions the ice was 
floating. My theory is this: It was a fairly broad and 
fairly deep river, carrying a considerable volume of water 
and much reddish mud. It excavated and occupied the 
Vale of Moreton. It was a long northward extension of 
the Evenlode, which existed before the valley of the 
Warwickshire Avon had been excavated. It drained 
the southern part of the Pennine range, perhaps a con- 
siderable part of the north-west Midlands, in the direction 
of the Plain of Cheshire, and perhaps some of the country 
to the east of the Pennine range. For in the valley of 
the Evenlode the oolitic escarpment is breached some 
200 feet lower than it is in the Andoversford neighbour- 
hood, at the divide between the Chelt and Coln. This 
seems to indicate that the Evenlode was the master 
stream in this district. It would, therefore, have developed 
some strike streams along the soft Lias outcrop to the 
east and to the west, streams strong enough to have 
captured the neighbouring dip rivers on the east; and also 
on the west, possibly even so strong as to have captured 
the important stream which excavated the breach in the 
oolitic escarpment east of Cheltenham. 
A northward extension of the Evenlode is necessary for 
three reasons :— 
1.—The Triassic material must have been obtained by 
the ice freezing at the sides of the river where the banks 
were cut through beds of Triassic conglomerate. 
2.—The river must have been long enough to give the 
ice time to thaw as it floated down. 
3.—The river must have drained a considerable north- 
ward area in order to be of that size and volume which the 
transported material appears to indicate. 
Another matter may be noticed: The absolutely unworn 
edges of the flints shew that the fracture was done by 
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