1913] SOME CLAY DEPOSITS IN THE S.-E. PART OF NORWAY 19 



gisk tidsskrift, vol. II, nr. 7, p. 17) which I gave on a former 

 occasion, there might be no reasonable doubt entertained as to 

 the true correlation of, at least, part of these two sections. 



The layer A of the Rakkestad section must have been 

 deposited as a fluvio-glacial one during the early ice-recession 

 from the Ra-stage to the Aas-stage and must of course be 

 contemporaneous vvith the upper portion of layer II of the Kilebu 

 section or possibly even in part with the very lowermost portion 

 of layer III of the same section. The layer B of the Rakkestad 

 section must certainly have been deposited during the latter part 

 of the ice-recession above mentioned as preceding the Aas-stage 

 and consequently it is contemporaneous with some part of the divi- 

 sion III of the Kilebu section. The layers A and B of the Rakke- 

 stad section consequently form the deposit of the Søreng period 

 in this place. Layer C of the Rakkestad section it is difficult 

 to regard in any other way than as a part of the peripheric facies 

 of the Aas-moraine or the first one of the two glacial series 

 constituting the Aas-stage. Layer E of the Rakkestad section 

 must in the same way, of course, be regarded as the latter one 

 of the two above mentioned glacial facies of the Aas-stage, viz. 

 that of the Ski-moraine. Layer D of the Rakkestad section 

 consequently is the deposit of the intraglacial part of the Aas- 

 stage. The layers G, D, and E of the Rakkestad section conse- 

 quently are to be correlated with almost the whole of part III 

 of the Kilebu section only with exception, perhaps, of the above 

 mentioned lowermost part of it which may possibly be of a some- 

 what earlier age as representing a fluvio-glacial deposit. The 

 division F of the Rakkestad section is built up of thin layers of 

 a sandy clay of a grev or yellowish.grey colour. Some of the 

 layers have a thickness of two or even three millimetres but a 

 greater majority of them forms layers thin as paper or only 

 with a thickness of half a millimetre. In this clay traces of 

 casts of fossils are met with which proved to be Portlandia 

 lenticula Møll. No reaction of HC1 is to be observed. It was 

 not, however, before the lower part of the division was reached that 

 the casts of Portlandia grew more common. I should think il 



