254 PROCEEDINGS COTTESWOLD CLUB 1909 
the western division, some of it found a better outlet by 
taking a backward course. The exact point of the divide 
was settled by a barrier formed by an out-crop of the 
Keuper Sandstone, fig. 8, but it is clear that the backward 
OoBeHine <ONGDON QUEENMILE 
ALSEVERN 
Fic. 8.—Enlargement of part of fig. 7, showing the strata of Keuper Sandstone, and the posi- 
tion of a lake until this was drained on the cutting of the gorge at Longdon. 
flow could not take place at once. Until the upper part 
had been cut down to the level of the barrier formed by 
this out-crop, the stream could not flow backwards. In 
coming down to this level, the stream met with conditions 
admitting of easy denudation, a complete anticlinal dome, 
fig. 8. There is a large area, any portion of which would 
still give a vertical section essentially the same as fig. 4, 
disregarding, of course, the part of the diagram marked 
A. This area was favourable to the formation of the lake 
of which manifest evidence remains in the Longdon 
Marshes. The gorge through the Keuper Sandstone by 
which the area is now drained can be seen near the Yard 
bridge on the road from Longdon to Upton-on-Severn, a 
little distance up the stream. 
The similarity between the features to be found in the 
glens of Scotland, as described by Sir A. Geikie, and those 
in the western division of our valley, is very striking. 
Proceeding in a direction up the line of the valley, we 
have the following sequence :— 
(1) Astream flowing down the valley:—the Glynch 
Brook, fig. 1. 
(2) A divide :—at Dobshill, figs. 1, 7, 8. 
(3) A stream directed up the valley :—the brook 
flowing through Eldersfield and Longdon to 
Queenhill, fig. I. 
