T. GronMo, — Marine avleiringer i DunderlaiHlrulalen. 71 



glaciale niveauforandringer i Kristianiafeitet). The above men- 

 tioned sinking of the land must therefore he the Tapes- 

 sinking, formerly pointed ont by Bamberg, 1 \ o 1 m hoc. 

 Hoel and more authors. 



:). The Lower Terrace Steps. 



During the maximum of the TapessmVmg the marine 

 boundary lay at about 70 m. above the present sea level. 

 Then the land rose for the last time, and during this rise 4 

 terrace steps were formed. At Skonscng, Røsvold, Reinforshei 

 these steps are seen from GO to 47 m. above the level of the 

 sea. When the shore-line reached 45 m. the whole fjord bot- 

 tom above Stenbækhang was once more drained. The run- 

 ning water carried great masses of sandy sediments into the 

 fjord below, and here they were accumulated over the old 

 deposits at the top of the great delta of the Dunderland and 

 Tveraa rivers the remains of which are the terrace Mohei and 

 flats at Selfors aud Ytteren from 35—25 m. above the level 

 of the sea. Further sinking of the shore-line caused building 

 of 3 lower terrace steps from 20—5 m. above the sea level, 

 especially well formed at Ytteren. A last step is now in buil- 

 ding at the month of the DumWland rivor at (nildsmHvik 



