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P. A. OYEN. M.-N. KI. 
Geological age of the series of strata. 
Having now read the facts as well in regard to stratification as in 
regard to the enclosed fossils it would be of great pleasure to us if it 
might be possible to refer this series of strata to quaternary horizons 
known in other places or to fixed quaternary niveaus. It is not easy 
to draw up such a comparison as the layers in question do not in any 
place be in direct connection with any fixed frontal moraine, nor has it 
been possible to follow the different fossiliferous layers over wider areas. 
The regular periodicity of the layers, as well as the character of the 
shifting fauna, might, however, make it possible to draw some conclu- 
sions indirectly. Before starting this investigation we ought to have 
some idea, at least, of the limit of ancient sea-margins or corresponding 
sea-levels of the district in question. I have not succeeded in mapping 
the uppermost marine limit just in the neighbourhood of Kilebu. Far- 
ther to the north, however, I succeeded in mapping that limit in two 
different places, near Skulerud! and south of Oieren?. And, to the south 
I succeeded in getting a rather good aneroid measurement of that limit 
in the neighbourhood of Krappeto, starting on the sixth of June 1907 from 
the railroad line east of Tistedalen rail-way station. Immediately south 
of Krappeto the highest ancient sea-level proved to have been marked 
with small terraces 171,7 m. a. s. Making up a calculation on a paper 
divided into squares we shall find the uppermost marine limit near 
Kilebu to be nearly 175 m. a. s. On the 14th, 15th, and 27th of July 
1911 I made some aneroid measurements of the terraces in the surroun- 
dings of Kilebu. In the close surroundings of the shell- or gravel-pit the 
sloping terrace was at an altitude of 137 m. a.s. And, higher up small 
terraces were seen 146 m.a.s. and 153 m. a. s, In the wood to the 
north-east, towards Torp, at flat gravel-terrace was passed at a height of 
148 m. a. s. The sloping terrace to which the fossil-bearing layers belong 
seems, however, to terminate nearly 142 m. a. s. 
In order to get a parallel for comparison we are to look on the 
reduced map and the scheme section that I published last year?. Then 
we shall see that Kilebu is situated between the Ra-stage and the Aas- 
stage. The two bottom-layers, I and II, of the Kilebu section conse- 
quently must be of an older age than the Aas-stage. And it is, more- 
over, highly probable that layer III corresponds with the deposition of 
1 P. A. Øven: Kvartær-studier i den sydøstlige del af vort land, 1908, p. 16. 
2 P. A. Oven: Kvartær-studier i den sydøstlige del af vort land, 1908, p. 44. 
3 P. A. Oyen: Nogle bemerkninger om ra-perioden i Norge, 1911, pp. 17— 18. 
