1921. No. 1 1. 



THE STRAXDFLAT AND ISOSTASY. 



283 



by the Yoldia Sea after the retreat of the ice-sheet does not seem suf- 

 ficient to account for this remarkable difference, as the Yoldia Sea also 

 extended over the Christiania region, and had there even a greater deptli, 

 but its extent was less. The isobases of "the upper marine limit" seem, 

 however, to have very irregular shapes in the region of Lake Vener 

 [cf. Munthe's map, 1910, PI. 46]. 



Taking the heights of "the upper marine limit" from H. Munthe's 

 isobase map of southern Sweden [19 10, PI. 47', and the heights of the 

 Tapes-Littorina level from his map of the Tittorina isobases [19 10, 

 PI. 46". and from Sundelin's map [1919- PI- X[ of the Swedish east coast 

 between Xorrköping and Kalmar, I have compiled the values given in 

 the following table. The heights at a few places in Jutland taken from 

 A. lessen [1920I have also been added. 



Localitv 



Height of 



Upper Marine 



Limit 



Hfiiilit Ol' Liiionna 



Level 



Observed Computed 



Difference 



Swedish East Coast : 



Söderköping . . . . 



Västervik 



Oscarshamn 



Kalmar 



Karlskrona 



Swedish West Coast 



Kulien, Scania . . . 



Gotenborg 



Jutland : 



Frederikshavn . . . 



Aalbor? 



122 

 93 

 83 



90 

 ca. .s 8 



43 



16 



24 



ca. 13 



2.8 



It seems surprising that along the Swedish west coast, e. g. at 

 Gotenborg about 150 kilometres from Mariehamn, the departure is found 

 to be — 7.8, which differs much from +15.7 at the latter place. 



The figures of the above table seem, however, to prove that along 

 the Swedish west coast, as well as along the Swedish east coast, south 

 of the region of Söderköping and Linköping, the Tapes-Littorina level 

 is considerably lower, about 8 metres lower, than it should be if computed 

 by our formula from the height of "the upper marine limit". This is 

 obviously the same relation between the Tapes-Littorina level and "the 

 upper marine limit" as is found in the northern part of Jutland, at 

 Skagen and Frederikshavn, where the departure of the observed height 

 of the Tapes-Littorina level is also about — 8 metres (see the tables 

 p. 282 and above), according to the figures given by Axel Jessen [1920J. 

 In Jutland the departure seems to decrease somewhat towards the south. 

 It was found to be about — 3 in the region of Aalborg. 



