358 
ALTERED ROCKS— WEST FLANK OF URAL. 
greenstone rise up beyond and almost encompass this altered rock, as represented 
in this woodcut. 
Having thus we hope clearly explained the causes of the dislocation on the 
high road, which have been produced upon a line of eruption from south-south- 
west to north-north-east, or parallel to the adjacent portion of the Ural, we may 
now return to the main section across the chain, merely stating by the way, that 
we traced for some distance westward or down the affluents of the Ufa. a pebbly 
calcareous grit with plants, similar to that which has been described on the 
high road from Perm to Ekaterinburg, and that we found it to overlie the car- 
boniferous rocks of this tract 1 . We may also mention, that already the difficulties 
of making any traverses of the Ural except by practised roads became apparent ; 
for upon expressing a desire to travel on horseback or on foot across the Ural 
from this point to Ekaterinburg, distant in a straight line little more than sixty 
versts, we were informed by the manager ot the Zavod that no Russian ever at- 
tempted it, and that hy no effort could we accomplish it. 
Section across the Ural resumed . — To the east of Grobovo, the road runs in one of 
the lateral depressions, and little stony matter is to be seen. The absence of all coarse 
detritus is, however, a phenomenon which cannot but surprise every geologist 
1 In a journey made by Count Keyserling, subsequent to that which we now describe, many fossils 
were collected which throw the clearest light on the age of the grits of Artinsk. See ante, p. 128, where 
we describe a section, including an undulation of Devonian rocks, from Nijny Serginsk to Sarana. 
