A glacial deposit near Christiania. 



of the north end of the Lake of Mjøsen and in the southern 

 and central part of Gudbrandsdalen. No less than thirty- 

 three individual stones of this characteristic rock are found 

 in the measured portion of the gravel. Then comes one 

 specimen of a conglomerate certainly belonging to the same 

 group. Next to this, we find Silurian rocks represented by 

 one stone of blue quartzite (blaak varts) and one single bit 

 of a Silurian schist. Here we also have to classifiy nine- 

 teen specimens of a sparagmite of quite the same type as 

 that met with over a great part of central Norway, especially 

 in the region of Gudbrandsdalen and Østerdalen. The 

 pétrographie character of this sparagmite is very much vari- 

 able, passing on the one hand into sandstones, on the other 

 one into a pure quartzite; out of the nineteen specimens, 

 above mentioned, seven ones proved to be a grey quartzite 

 with a yellowish tint. The other ones were of the usual 

 type, often very fine in grain, and varying in colour, grey 

 with reddish, greenish, yellowish and violet tint. The place 

 of this sparagmite in the stratigraphical system is as yet 

 somewhat uncertain, having by some geologists been stated 

 to be Primordial or Cambrian, and by others to belong to 

 upper Silurian, or to be of the same age as Old Red Sand- 

 stone. Then we here have also to classify nine specimens 

 of sandstone, coloured in grey, yellow, brown and reddish, 

 some of those ones perhaps belonging to the above-mentioned 

 group of sparagmite of much questioned geological age, such 

 as we find that rock characterized by its sandstone-like ap- 

 pearance in some parts of Østerdalen, but a couple of them 

 probably belonging to Old Red Sandstone, such as we find 

 this group to be developed in the central district of the Lake 

 of Mjøsen. Altogether there is a number of sixty-four spe- 

 cimens belonging to sedimentary rocks. 



