4 Pentti Eskola. SM (LX 
ancient phases of denudation have been preserved above 
the actual one. Zones of displacement are here actually 
exposed, appearing in the form of intimate faulting an: 
crushing up of the rock. This phenomenon is especially 
striking in the limestones, e. g. at the Molodost Bay, on the 
isle of Kyltyghey, and on Mys Kourboulik. The limestone 
of Sviatoy Noss is generally coarsely crystalline and contains EA 
graphite in the form of scaly crystals. In all the localities 
named it may be seen from gradual transitions, how the bo 
limestone has been sheared, crushed and finally ground up 3 
to such a fine grain that, if this ultimately mylonitized Er 
variety is examined alone, it may easily be mistaken for ET 
primarily fine-grained, i. e. slightly metamorphosed lime- 
stone. In this process the graphite at first is stretched out 2 
into thin bands and then gradually ground to form a fine 
powder and mixed with the crushed up calcite. Thus the 
marble, formerly shining white in colour, has grown dull 
gray, sometimes almost black. The mylonitization appear 
also in siliceous rocks, though less striking. On Mys Kour 
boulik the faulting in the limestone is generally less intimate 
and the fault planes have been opened to form quartz-vein 
containing drusy cavities with. franca prismatic cryst 
of quartz. | 
The distribution of he occurrences of mylonite and fault 
breccias already indicates that the' faulting, at this side 0 
Sviatoy Noss, is distributed among a series of parallel plane 
at short distances from one another. The amount of the 
displacement is probably not very considerable, as, on th 
bed of the Tshivirkouy Bay we meet, on many low island 
the same rocks that build up the neighbouring part of t 
peninsula. i 
Similar zones of displacement no doubt exist on be 
western side of the peninsula, though hidden beneath the 
water. 
