42 J. G. ANDERSSON, (Schwed. Südpolar-Exp. 
higher we meet the bottom of the basalt-tuff formation, that is overlaid in this re- 
markable locality by a small patch of Pecten-conglomerate. 
At the place marked (14) there is, near to the sea-level, an outcrop of beds, the 
age of which by the find of an ammonite was settled as Cretaceous. 13 is the lo- 
cality of the glauconitic ba 7 tk here in question. I have not noted that this bank 
was actually observed on the other side of the narrow basalt-dyke here traversing 
the sedimentary beds, but it seems to me quite indubitable that the dyke cuts 
through the glauconitic bank as well, though the bank may lie at a different level 
on the other side. On both sides of loc. 13 there were outcrops of loose sandy, 
current-bedded layers similar to the Cretaceous beds of 12 and (14), but quite 
non-fossiliferous. The whole lower, sedimentary part of Cockburn Island is overlaid 
by the basalt-tuff formation. 
Sandy beds. Glauconitic Basalt-dyke. Basalt tuff. Pecten- 
bank. conglomerate. 
Taking into consideration all the observations here mentioned, it will be found 
rather natural, I think, that I supposed the glauconitic bank of loc. 13 to be Creta- 
ceous. But now Mr. Buckman, supported by the incontestable evidence of Brachio- 
poda found in this bed, tells us that it is Tertiary^ Oligocene-Miocene or preferably 
Miocene. 
This remarkable discovery proves that the beds of Cockburn Island must have 
undergone dislocations, which brought Tertiary strata to the same level as those 
of Cretaceous age. In fact, Mr. Nordenskjold, on our joint visit to Cockburn Island, 
some days after my discovery of the different fossiliferous beds in this island, pointed 
out that the sandy beds in the slope above the glauconitic bank were disturbed 
and contorted. 
The section given above is to some extent schematic, as in reality the basalt- 
tuff formation comes in NW, at loc. (14), somewhat nearer to the sea-level than 
in other parts of the island. But it is quite evident, as can be seen also from PI. i C 
in my paper of 1906, that the basalt-tuff forms a continuous sheet covering the 
denuded surface of the sediments which form the lower part of the island. The 
basalt-dyke at loc. 13 is most probably connected with the basalt-tuff formation, 
