4 P. A. ØYEN. M.-N. Kl. 
It is, however, more correctly to regard it as a compound series that 
has been deposited at the bottom and in the littoral belt of an ancient 
bay as we may trace the fossiliferous sand and gravel along the bottom 
and sides of the valley nearly up to some indistinct terraces covered 
with stones and flourishing growth of Pteridiwm aquilinum L. 
In a well-developed terrace, at an elevation of 137 meters above sea- 
level, I succeeded in clearing up a complete section through the un- 
disturbed deposit, and this proved to be of such an interest that I have 
regarded it suitable to form the base of the present paper. Of course, 
it is necessary to initiate the discussion with a complete description of 
the section and we shall try to do so, as far as possible, as well from 
a stratigraphical view as from a faunistic one. 
I. 
At the base of the section we meet with an aquiferous layer 
consisting of grey sand that is rather coarse but at the same time only 
slightly assorted. The finer material proves to be of the same character 
as quicksand. In some places we find the colour to be more bluish or 
even brown. HCl gives no reaction. This layer, that has a thickness of 
about r—2 decimeters, is only to be regarded as the lower part of the 
following one. 
II. 
This layer has a thickness of 80 cm. It proves to consist of a true 
boulder-clay of a grey or somewhat tawny colour, It contains a number 
of edged and angular blocks and ice-scratched stones of different size, 
of which almost every one derived from the surrounding archæan rocks. 
As occurring in nearly the same manner some small bits or pieces of a 
bluish-grey clay mixed up with sand and gravel were also seen; in some 
scattered places the same material occurred as thin, irregular layers of 
only short length. HCl gives no reaction neither in the morainic matter 
nor in the clay fragments. 
IT. 
This division forms a direct sequel of the preceding one, only that 
it has a more sandy character, and that the enclosed fragments of clay 
are far less prominent. HCl gives no reaction. The thickness of this 
layer is 10 cm. In the very uppermost part of this layer some few and 
very small fragments of Mytilus edulis L. are seen; it is, however, most 
probable that these fragments were washed into the layer in question 
during the first part of the following time when the next division was 
developed. 
