2b 



The deep basin would then alternately become salt and fresh. 

 Thus, a rise of the ocean of a few metres would be sufficient to 

 lead to the formation of thick salt-water layers in the basin. 

 If the embankment now, again, becomes upheaved a few metres 

 the basin will become fresh, and thick fresh-water layers may 

 be superimposed the salt-water ones. And in this way the for- 

 mation of alternating salt- and fresh-water layers may proceed, 

 with slight displacements of the beach-line, until the basin is 

 filled up. 



It would appear to be more difficult to accommodate the 

 hypothesis, with the quite considerable upheavals which some 

 countries have undergone in the interval that has passed since 

 the glacial age. Thus, the highest marine terraces, from the 

 post-glacial age, are, near Christiania and Throndhjem, situated 

 188 metres above the sea. But in other parts of our country 

 the highest marine terraces are situated much lower, so that it 

 looks as if the upheaval had not been uniformly great in all 

 parts. It appears to have been less, outwards from the centre 

 of the land. And in Southern Sweden and Denmark it has in 

 the same period been inconsiderable. Penck has (Schwankungen 

 des Meeresspiegels in Jahrb. d. Geogr. Gesellsch., Miinchen VII) 

 shown that an inland glacial mass exerts an attraction on the 

 sea, which on that account stands higher on the coasts of a 

 country which is covered by ice. The melting of the inland 

 ice must, thus, have caused the seas on our coast to have sunk 

 a little, but the difference between the situations of the highest 

 marine terraces in the various parts of Scandinavia is far too 

 great \ even in adjoining districts, to permit of an explanation 

 in this manner, and the most likely explanation is, that the 

 land has been upheaved in different degrees 2 in different 



