HEIDELBERG MAN 
231 
that M. Rutot distinguishes the deposits corresponding 
to those of the 50-foot terrace of the Thames valley as 
the deposits of the lovj terrace ; those corresponding 
to the 100-foot terrace as the middle terrace. In the 
deepest or oldest deposits of the low terrace, he finds the 
shaped stones which represent his second Pleistocene 
culture — the " Mafflien." Then follows the " Mesvinien." 
Both of these cultures lie in and under the " glaise 
inoseen " — which we suppose to correspond to the 
chalky boulder clay. At least it is a remarkable fact that 
in the chalky boulder clay and mid-glacial sands of East 
BRICK EARTt 
EISTOCENE 
HI SANOV LOAM 
n CLAY LOA^ 
1 CLAYS 
(G!a<5t Mos ten) 
? ■'"' 
Fig. 80.— Section of the middle (lOO-foot) terrace at St Prest, near Chartres. 
Anglia Mr Reid Moir has found Eolithic cultures very 
similar to those distinguished by M. Rutot as " Mafflien " 
and " Mesvinien." 
One other observation of M. Rutot, with an important 
bearing on our present inquiry, is reproduced in fig. 80. 
The figure reproduces M. Rutot's section of the famous 
gravel" deposits at St Prest, situated in the valley of 
the Eure, a tributary of the Seine, about fifty miles 
to the south-west of Paris. The deposits at St 
Prest represent those of the 100-foot terrace -- M. 
Rutot's middle terrace of river valleys. The section at 
St Prest is of particular interest because here the 
Pleistocene deposits of the terrace rest directly on other 
formations of a late Pliocene date. It was in the deep 
