Prof. Hüne — Acros-s Europe and Asia. 
403 
After tliis a third Productus -] imestone is found, which rests uncon- 
formably upon the underlying Devonian. The repetition of this 
Productus-limestone may perhaps be explained in a manner similar 
to that which I have suggested as an explanation for the intercala- 
tions of the Fusulina - limestones on the western side of the Urals. 
The general relations of these three coal-fields are sbown in the 
following table : 
I. 
II. 
III. 
As the materials which form this table, and tbe description I 
have given, were collected from verbal inforination and the little 
that I saw, they must only be taken as giving a general outline of 
the chief geological features of this district, which will shortly be 
published in St. Petersburg with detail and accuracy. 
Up to the present time little or nothing has been known about the 
existence of coal upon the eastern side of the Urals. At many 
places it has, however, been discovered, as at Geogorshina, Irbit- 
skeeya, Yershene, etc. The general dip at these places is S.W. 
towards the Urals. In the northern parts it is more anthracitic 
than in the south, but this seems to be connected with the fact. that 
there it is more bent and contorted, owing to its approaching more 
closely to the crystalline rocks. Some specimens from the above- 
mentioned localities had this character, and they were also very 
friable. Their friability resulted from the numerous small joints by 
which they were traversed. Some of these joints were stained with 
iron, others held a small quantity of loose carbonaceous dust, w hilst 
a few contained a white talcose mineral. The thickest seam yet 
found on this eastern side of the Urals is between six and seven feet, 
but this is divided by some clay partings. The thickest seam in 
Russia is, I believe, in the Solekamsk district on the River Luma, 
South of Moscow. 
"West of Urals. 
East of Urals. 
1. Limestone with Fusu- 
lina cylindrica. 
1. Millstone-grit. 
2. Limestone with F. 
cylindrica. 
3. Sandstone, slate, and 
Coal. 
2. Limestone with Pro- 
ductus gigas. 
I 
4. Limestone with Pro- 
ductus gigas . 
1. Limestone with P. 
gigas. 
2. Sandstone, Coal and 
conglomerate. 
3. Limestone with P. 
gigas. 
4. Sandstone, conglome- 
rate and Coal. 
5. Limestone with P. 
gigas. 
3. Clay-slate with Stig- 
ma ria ßcoides and 
Coal. 
5. Sandstone and Coal. 
Devonian. 
Devonian. 
Devonian. 
