128 
PROCEEDINGS COTTESWOLD CLUB 
1919 
the evolution of the more elaborately worked lance and arrow 
heads. The association of Palaeolithic and Neolithic types 
on the Cotteswolds does not prove that Pleistocene man lived 
in that region, for not only are the whole of the flakes, cores, 
and implements confined to the surface soils, but the uplands 
were probably uninhabitable during the greater part of the 
Glacial Epoch on account of the severity of the climate. The 
mingling of the different types has been accounted for on the 
supposition that some of the Neolithic peoples before their 
arrival in Britain may have been in contact with surviving 
remnants of primitive Continental races, by whom the 
fabrication of the Paleolithic types had been continued 
( 60 , p. 299). The only chronological arrangement that can at 
present be suggested is that which assigns the small finely- 
worked leaf-shaped arrow-head to the Long Barrow period 
and the tanged and barbed varieties to that of the 
Round Barrows. The latter varieties have not been 
observed in primary interments in Long Barrows on the 
Cotteswolds. 
The few physical changes on the uplands and slopes 
of the Cotteswolds in Recent times are ascribable to the slow 
work of atmospheric denudation and underground solution, 
to which latter cause the formation of some of the dry coombs 
may be assigned. The results of landslips, some on a large 
scale, are apparent in the Fuller’s Earth at Chalford, in the 
Freestone on the northern slope of Stroud Hill, on Charlton 
Common, and many other places. Superficial changes on the 
Malvems have been mainly confined to disintegration of the 
granites and diorites, the products of which may be seen in 
the clayey gravels and sands, especially on the lower slopes 
of the Range. 
Conditions in the Severn Plain have been modified during 
the Neolithic period by the depression that submerged the 
Bristol Channel area and extended tidal water in the Severn 
as far as Worcester. The balance of elevation and depression 
in Recent times has resulted in the present sea level, which is 
supposed to have been reached about 3,500 years ago ( 154 , 
p. 1 15). There has' been no perceptible change in the Lower 
