414 
DOMANIK SCHISTS. — DEVONIAN ROCKS OF THE TIMAN. 
Domanik by the natives) are seen on the banks of the river Ukhta. These consist 
cf black, tender, argillaceous and siliceous schists alternating, which are saturated 
with naphtha. They contain simple lobed Goniatites, long and slender Ortlioee- 
ratites and small Cardiaceee, the whole reminding us of certain dark slaty beds, which 
at Wissenbach, in Nassau, have been shown to occupy the very uppermost limits 
of the Silurian system (see Geol. Trans, vol. vi. p. 414). Some of these black, 
flaglike beds are as flexible as the well-known band of sandstone in the magne- 
sian limestone near Sunderland, or more so ; and sounding under the hammer like 
wood, may be polished and carved as a substitute for ebony. The fossils are chiefly 
found in small calcareous concretions of grey colour, which mark the laminm of 
deposit, and are entirely free from the naphtha which permeates the mass of the 
rock, and gives to it a bituminous character. 
Devonian Rocks of the Timan. — The “Domanik” schists are flanked on either side 
of the range by red and greenish sands and marls completely resembling the typical 
Devonian rocks of the Valdai Hills, and of the government of Olonetz. These 
rocks play a most important part in this chain ; and the northern river Tzilma 
exposes in a transverse section, nearly all the different beds of which they are 
composed. Further to the south, they are developed on the little river Vol, 
reposing upon inclined schists. They there contain the Terebratula Meyendorjii, 
whilst their most characteristic fossils are various remains of the well-known Ich- 
thyolites of the system common to the Baltic provinces of Russia and the British 
Isles, together with the Spirifer d’Archiaci and the Terebratula Livonica. Towards 
the base of the system, the 0? this strxatula and Terebratula prisca abound here, as 
in the same position in other parts of Russia. In a word, the whole series is made 
up of red and variegated marls, red and yellow sandstone, with courses of marly 
limestone, whilst gypsum of red and white and green colours is interlaced with the 
other beds in thin courses, and is specially developed on the banks of the Pijema 
or Pishma. 
Carboniferous Limestone and Millstone Grit of the Timan. — Overlying these true 
Devonian strata, the outer flanks of the Timan present bands of white carboniferous 
limestone containing the Spirifer Mosquensis, and exactly resembling the rocks of 
the same age at V itegra and other places in Russia. And here it is curious to 
observe, that these pure white limestones repose at once on the Devonian strata, 
without the intervention of any lower sandy beds, such as occur in the Valdai Hills 
and to the south of Moscow. 
