DESCRIPTION OF ROCKS AND ANALYSES 17 
basalt flow suggest an upper mesozoic or even tertiary age. Even 
some evidence, that a strong denudation of sedimentary rocks has 
swept over the country before the basalt outbreak, is given by the 
_transgressional position on the permo-carboniferous met with in the 
few points where the floor rock was accessible to observations. 
This confirms the statement above that the outbreak took place in — 
continental conditions. Another proof of the youth of the basalt 
is given by a spring of constantly elevated temperature (earlier 
determinations —- 32°C, later ones +-28°C), which penetrates the 
Productus-limestone only a few kilometres further south of the 
Pymva-you river, left hand affluent of the Adzva; the spring is 
known since 1828 and tests the postvolcanic action by abundant 
sinter deposits. Although there is no strong evidence of the late 
mesozoic or early tertiary age of this basalt, and consequently no 
certainty of the rock belonging to the arctic plateau basalt, the 
characteristics are quite significant and uniform. 
The basalts (diabases) of the Timan hills further westward are 
reported as being of palaeozoic age; they are rich in zeolite 
nodules. The basalts (diabases) of the Kanin peninsula, as described 
by Ramsay,! also seem to be of palaeozoic age, as the copper- 
bearing melaphyres and augitporphyrites too of the Novaia Zemlia’s 
southern island. 
Herewith the ring around the pole is closed; some closer cha- 
racteristics of the eastern basalt representatives of the Arctic plateau 
are to be given in the following chapter. 
4. PETROGRAPHICAL DESCRIPTION OF ROCKS AND ANALYSES. - 
A. Basalts from the farthest east. 
a. Bennet island. The basalt from this island is, as far as can 
be judged from hand-specimens, medium grained and rich in zeolite 
patches and cavity fillings, the zeolites partly being so intimately 
1W.Ramsay, Beiträge zur Geologie der Halbinsel Kanin. Fennia 32(1911—1912) N:o7. 
