308 







James Geikie — Origin of the Sivedish Asar. 



depth of sand, forming togetlier an as, h In deep gravel pits 

 opened in the asar, it would seem that coarse gravel has actually 

 been found to repose upon underlying beds of sand and clay — two 

 sketch-sections being given in the paper to show this arrangement. 



The close connexion between the asar of the valleys and those 

 that strike across the low country, clearly shows that in both 

 districts they must have been formed in the same way. As an 

 example, Mr. Tornebohm cites the asar that occur in the basin of the 

 Malar Lake. To apply his explanation to the asar of that region, it 

 is necessary to suppose the Malar basin to have been filled up with 

 sand and mud, through which the rivers, coming from the melting 

 mer de glace, cut their way to the sea. He then points out that the 

 asar, in their geographical distribution, show a striking resemblance 

 to river-courses, as will be seen from the accompanying sketch-map, 

 on which the thick black lines represent the asar. 



Fig. 3. Sketch-Map of the Malar Basin, showing the dii-ection of the Asar. 



