170 0. Holtedahl — A Tillite-like Conglomerate. 



sequence is in the main as described above, for here a 

 thick mass of red sparagmite is exposed as the oldest 

 zone, while in the valley itself the lower part of the 

 "quartz sandstone" is developed as a true, and in part 

 a very coarse, sparagmite (the "gray sparagmite" of 

 0. E. Schiotz), resting directly on pre-Cambrian granite. 

 Here denudation must have taken place while the red spar- 

 agmite was being deposited nearby to the west. On the 

 other hand, the red sparagmite of the eastern localities 

 mentioned, that is, in an area that must be very close to the 

 eastern boundary line of this formation, is not in any 

 respect different from that farther west. In other words, 

 it does not seem likely that the present boundary line of 



Fig. 2. 

 S. W. N. E. 



Fig. 2. — Generalized stratigraphic succession of the southern sparagmite 

 area and adjacent districts before the Caledonian deformation (Ordovician 

 and Silurian divisions not introduced). Complete sequence in middle part 

 of the section: 



Upper and Middle Cambrian (alum shale). 



Lower Cambrian Holmia shale (in black). 



Quartz sandstone. 



Eed sparagmite with tillite-like conglomerate on top. 



Biri limestone. 



Gray sparagmite. 

 To the left, pre-Cambrian gneiss and granite. To the right, pre-Cambrian 

 granite, porphyry, and Trysil sandstone with sheets of diabase. 



the red sparagmite was the original one, because then we 

 should expect distinctly coarser rocks at the eastern local- 

 ities which were nearer to the highlands. Moreover, along 

 the western boundary of the sparagmites the red sparag- 

 mite (and its metamorphic equivalents) are seen suddenly 

 to disappear in this direction. If we remember, further- 

 more, that in the Mjosen district, near the southern 

 boundary of the sparagmite area, bowlders of limestone, 

 which no doubt belong to the lower part of the sparag- 

 mites, occur in the tillite-like conglomerate at the top of 

 red sparagmite, we must conclude that there have been 

 decided marginal uplifts in younger Sparagmite time, 



