A glacial deposit near Christiania. 



erosion for this line of deposition a part of that rather 

 extensive occurrenee of Archæan gneiss-granite between the 

 Lakelet of Gjersrud and the Lake of Lyseren. 



Among the blocks and stones of sedimentary rocks we 

 meet with even a stronger proof of a nearly southern direc- 

 tion of ice-movement. The grey sparagmite, the conglomerate 

 and the red sandstone show quite the same fact as the small 

 bit of Silurian schist, this latter being a scanty rest, but no 

 less, a sure evidence of soft Silurian schists being for the 

 most part ground down into fine clay. The specimen of blue 

 quartzite and the lighter, fine-grained sparagmite of central 

 Norway are no distinguished indicators of the true line of 

 glacial movement, but the specimens of that sparagmite, in 

 no way a slight percentage out of the whole number of 

 blocks, show that there has taken place, even in this period 

 of the glacial age, a removal of rocks from central Norway, in 

 no way inconsiderable, if we are not to urge in a more 

 unreasonable manner, that we as to those rocks only have 

 ^o deal with removed morainique matter. 



As to the occurrence of specimens of typical horufels, 

 w e have no reasonable inducement to believe that they have 

 been removed in any other direction than nearly the true 

 south one. Moreover, it is highly probable, that a couple 

 of specimens of a mixed grey-greenish colour, distinctly 

 tinged with yellow, is of quite the same type as that met 

 with to the north-east of the Lake of Movand, and it is 

 highly interesting to see, that a line crossing the territory 

 of contact-metamorphosed schists to the south-west of Rotnes 

 lies inside the angle of westerly deviation marked by a line 

 across the Lake of Alunsjøen, in the region of which we 

 also find the probable native place of that contact-metamor- 

 phosed rhomben-porphyry above referred to. 



