vol. xx. (2) NOTES ON COTTESWOLD-MALVERN REGION 107 
of the Black Flints at Compton Scorpion, but that the effect of 
repeated axial movements in the Vale of Moreton would be to 
lessen this distance by decreasing the thickness of the underlying 
zones of chalk. 
There is not, to my knowledge, any other example of overlap 
of the Micraster chalk on to pre-Cretaceous strata, and there 
is, therefore, some difficulty attending the adoption of my 
hypothesis. 
I find that, while there is a very small admixture of Oolitic 
debris in the Moreton gravels, there are many ferruginous 
box-stones from the Middle Lias, which suggests the possibility 
that there was little oolitic rock to be removed by denudation 
from that area. 
IV. The Cotteswolds and the Severn Plain. 
Although none of the superficial deposits of the district 
can definitely be identified as of Tertiary origin, there are in 
many places, between elevations of about 700 feet O.D. and 
the level of the Severn, patches of scattered Drift composed 
mainly of Quartzose pebbles and weathered flints (Class C), 
the positions of which lead me to the conclusion that they are 
the remnants of gravels deposited by rivers flowing in a south- 
easterly direction at successive levels during Tertiary times. 
The expert examination of the Drift specimens has confirmed 
my opinion that, with the exception of a few igneous rocks, 
too much altered or decayed to permit of identification, the 
greater part consists of Quartzose pebbles originally derived 
from the Permian and Triassic conglomerates and the Pebble 
Beds of Staffordshire, Worcestershire, and Warwickshire. 
Beds at the base of the Waterstones at, the Berrow Farm, 
Dymock, contain “ pebbles of quartz rock exactly similar to 
those of the famous Budleigb Salterton pebble-beds in 
Devonshire ” ( 187 , p. 249). The flints and cherts and some 
of the pebbles may be the remnants of rocks that formerly 
extended over the district. The original gravels have been 
reduced to these constituents by the elimination of the more 
soluble rock-fragments, those that have survived remaining in 
