1916.] THE MOUSTERIAN PERIOD. $93 



Although not seen in this section it can be traced passing 

 over the deposit of the 50 ft. beach which is resting on the 

 top of the higher land, and I show it in the diagram. There 

 is an important point which I give here in place of in Part I. 

 of the 1st Stage. It is that the doubts some have expressed 

 of the succession of the two lower beaches is here satisfied, 

 for the glacial clay rests three feet thick on the top of the 

 beach, therefore the beach cannot be claimed as having been 

 laid down since the glacial epoch.* 



How far this applies to the Jersey 40 feet beach de- 

 scribed by Dr. Marett (see " Pleistocene Man in Jersey," fol. 

 478), where he says " Submergence indicated by the raised 

 beach existing above the peaty layers with Neolithic remains 

 at Green Island," ..." corresponds with a 40 feet beach at 

 Mont Ube." " Mr. Clement Keid assigns this last subsidence 

 to late Neolithic times." Our evidence of that subsidence is 

 very plain and of the same nature as that of Green Island, 

 but we have no raised beach. I shall show in a future stage 

 that the late Neolithic subsidence produced no raised beaches, 

 it was of too short a duration, but it did redistribute the marine 

 sands. I therefore would assign the Mount Ube beach to 

 the raised beach period and the Green Island sands to the last 

 subsidence. 



In this case the presence or absence of late glacial clays 

 on or near Mont Ube would assist in the differentiation. 



We have another type of evidence bearing on the climate 

 of the inter-glacial period which belongs to a dry and elevated 

 land in contradistinction to the sands and gravels which show 

 torrents and partial submergence, in the condition of the 

 remnants of the upper clay at L'Ancresse. It will be seen 

 that the clay at Miellette, although eroded on its surface is 

 not cut into, and was evidently covered by later deposits at 

 the time of the L'Ancresse erosion I now describe. 



That there was a level deposit under the accumulated 

 blown sand dunes I have satisfied myself, but it is also plain 

 that it has been exposed to dry heat, for it is cracked and 

 divided into separate longitudinal strips. Some of the cracks 

 have been enlarged by water streams, with the result that 

 every here and there we find detached masses, more or less 



* The succession cf the two lower beaches is also made clear by the colour of 

 the flint pebbles they contain. 



The 25 feet beach-flints are patinated white, but those of the 50 feet beach are 

 in the top layers iron stained and therefore a ruddy brown. The staining of the 

 flint pebbles of the 50 feet beach is the result of the super-imposition of the upper 

 clay which, .resting in places directly on the beach, has permeated it and thus 

 stained the flints. 



This did not occur in the 25 feet beach because of its being covered at the time 

 of the deposition of the lower clay. 



