1913] THE QUATERNARY SECTION OF FOSS 



quarters of a metre, and very often portions of those blocks pro- 

 trude into the overlying, fossil-bearing clay. The till is of a grey 

 colour with a dash of red; it gives, however, no reaction to HG1. 



Immediately overlying the above mentioned till-and sand- 

 deposits there is a series of fossil-bearing clay laid up in only 

 thin layers of a thickness of about one millimetre and inter- 

 calated with layers of fine sand thin as paper. This clay has a 

 yellowish-grey colour and often contains fragments of molluscan 

 shells and is sometimes mixed with a little gravel, but it must 

 be regarded a rather curious fact that it does not give any reac- 

 tion to HC1. The fossils found in this series were as follows : — 



Area glacialis Gray was rather numerous especially as 

 casts of the typical form and normal size. 



Axinus flexuosus Mont. 



Macoma calcaria Chemn. forma typica, but only occurring 

 in rather small specimens. 



Saxicava pholadis Lin. juvenile specimens. 



Antalis striolata Stimps. 



Lunatia groenlandica Beck. 



Upwards, as we ascend through the different layers they are 

 shading gradually into a more or less compact mass and are at 

 last almost obliterated so as to leave a faint lamination, only 

 to be traced in some scattered places. No fossils have been de- 

 tected in this upper clay that is to a rather great extent highly 

 decomposed ; and increased decomposition towards the uppermost 

 part of the clay makes this portion of it appear only as a much 

 weathered mass of grey colour and sandy character. 



At a distance of 43 metres in a north-easterly direction from 

 section A we meet with another one (section B) of great impor- 

 tance as to the study of alternating glacial and marine deposits. 



The lowest part of the exposed section B is formed by layers 

 of finely laminated clay being visible in a thickness of about one 

 metre, but the bottom of the clay is not exposed and the upper 

 part of it proved to be much eroded so as to present a most 

 irregular surface with depressions of about one metre and a half 

 in depth representing for the most part true glacial grooves or 



