in Norway arid in Canada, 117 



above mentioned localities, the conglomerate is also enveloped 

 in a large group of quartzite, which contains besides, only a few 

 isolated masses of greenstone. The perfectly boulder-like con- 

 cretions of the conglomerate bed, which range from the size of a 

 hazelnut, to that of the human head, are here of the same sort 

 of greyish-white splintery quartz, which forms the strata of the 

 whole surrounding group. A few of them only are reddish, and 

 remind one of the jasper-like masses which appear to be gene- 

 rally associated with these conglomerate quartzites. At the Hjaerdal 

 locality, already described, Naumann found whole layers of jasper, 

 close to the conglomerate. The cementing material of the con- 

 glomerate betwixt Guldnaes and Berge is argillaceous, and small 

 in amount ; and is certainly to be regarded as analogous to the 

 small beds of clay slate, which occur as regular layers between the 

 thick quartz strata, at other points in this neighborhood. Al- 

 though the foliation of the pure quartzite is retained in the con- 

 glomerate, which is many fathoms thick, this nevertheless, like that 

 below Manddal, does not appear to occupy any well-defined 

 horizon in the stratification. In place of forming a continuous 

 zone along the strike, it appears rather to be a comparatively 

 short and irregular mass. 



Occurrences of this sort, which may be regarded as belonging 

 at once to the quartz and to the mica schist, are found to a con- 

 siderable extent on the northwest of Sillegjord Lake. Here, on 

 the boundary of the primitive gneiss formation, at several points 

 where the quartzite begins to replace the mica-schist, we find 

 layers in which the quartz occurs in the shape of long 

 cylinders as thick as the finger, and rounded oflf at both ends, as 

 elongated almond-shaped masses ; or in the form of boulders, im- 

 bedded in a cement of mica schist. 



Some time since, Naumann directed attention to the fact that the 

 amount of talc contained in the cement is greater, the more the 

 conglomerate is varied in its composition. I have often confirmed 

 this, and have moreover remarked that the talc seems to stand 

 in some intimate connection with these problematical rocks. This 

 may be the reason why they have nowhere been found more fre- 

 quently than on the road between Berge in Brunkeberg, and Qvale 

 in Hoidalsmo ; where the quartz beds are associated with other 

 rocks, and especially with those of a talcose nature. The most re- 

 markable conglomerate of this district, as well on account of its 

 composition, as its thickness, is splendidly exposed in a narrow 



