378 THE DEPOSITS, 



of water- washed gravels and sands showing stratification. 

 Here then we have cold without water flowing, in other 

 words an ice-bound period which in turn gave way to a 

 copious water-rush which washed all lo-jse material down into 

 the interspaces. After the first falls of large stones and the 

 subsequent melting of snows the type of deposit changes, and 

 we find pebbles and sea-worn rocks which have been brought 

 down to the valley and dropped on the beach by being ice- 

 borne, and with these are deposits of clay. 



These deposits show the following : — 



1st. — Evidence of dry cold, an elevated land and 



severe frost. 



2nd. — Milder conditions with winter snows and sum- 

 mer meltings. 



3rd. — A descent of ice down the valley carrying 



the boulders and wearing the contour of the valley from 



the V-shaped water valley to the cup-shaped ice valley. 



The above show that the valley was not originally formed 

 by any of the agencies I have detailed as belonging to the 

 Pleistocene period, but that they pre-existed that period ; 

 they were, in fact, carved out during the Pliocene times. 



The Moulin Huet valley is a hanging valley because it 

 was filled up during glacial times and extended much further 

 out to sea. The glacial deposits have been cut back by sea 

 erosion of recent date. 



I have found that the smoothed rock at the commence- 

 ment of the valleys are more easily recognised in the St. 

 Saviour valleys, where they cross the roads and lanes always 

 with a trend towards the adjacent valley. 



Ice-worn rocks on the coast are more difficult to deter- 

 mine and I am not depending on their evidence, although I 

 believe that they are to be distinguished. The reason for the 

 doubt is that sea-worn rocks are both smoothed and scored by 

 sea and pebble action. 



While attaching very little importance to the evidence 

 thus afforded, I shall enumerate a few positions where the 

 smoothed stones may be seen. 



The large outcrop of quartz at Jerbourg is smoothed in 

 places and a detached piece has markings on it which either 

 result from a slide or from ice friction. I do not decide the 

 point. At Moulin Huet there are detached rock masses 

 which may be of this character, and along the south-east coast 

 there are patches of rock showing the same conditions. 



