18 P. A. ØYEN [No. 12 



the moraines of the Aas-stage did not show any evidence of the 

 characteristic dichotomy that is rather conspicuously pronounced 

 in other portions of the section where intluenced by the climatic 

 oscillations that gave origin to the subsequent morainic stages 

 of this region. No doubt, local circumstances have caused this 

 aberrant feature. The very same conclusion may also be drawn 

 from the biological facts as represented in the section itself. 

 Consequently we ought to expect to find the missing link in 

 other places in which more favorable conditions had prevailed. 

 Such a place proved to be the terrace into which had been 

 sunk the clay-pits of the tile-work of Rakkestad at a short 

 distance to the south-east of the railway-station of the very same 

 name. As well the stratigraphy as the fossil remains of this 

 clay deposit proved to be highly interesting. The complete 

 section in this place was as follows: — 



H. 2—3 dm. Mould of a grey colour or in some places 



crumbling sod. 

 G. 5 „ Clay mixed with sand, rather decomposed and 



of a grey colour. 

 F. 25 „ Clay of a yellowish-grey colour laid down in 



thin alternating layers with fine sand of a grey 



or yellowish-brown colour. 



Sand-layers of a yellowish-grey colour. 



Sandy clay of a bluish-grey colour. 



Sand-layers of a yellowish-grey colour. 



Sandy clay of a bluish-grey colour laid down 



in very thin layers. 

 A. 10 — 15 „ Grey sand of mean-sized grains. 



The base of the section rests on glaciated archaean rocks. 

 And the level of the wide and somewhat eroded terrace rises 

 to about 110 m. a. s. 



When we compare this section with the above mentioned 

 Quaternary section of Kilebu (Christiania Vid.-Selsk. Skr. I. 

 Math.-Naturvid. Kl. 1912. Nr. 8) and with the sketch-map of the 

 large moraines of oscillation of southern Norway (Norsk geolo- 



E. 



1-2 



D. 



5 



C. 



1—2 



B. 



5 



