COPPER MINES AND GARNET ROCK OF TURYINSK. 
399 
and the intruding rock (dolerite) is not very different from this of Turyinsk. 
In the Uralian case, however, the grandeur of the operation must not be ioi- 
gotten ; for the garnet rock, loaded with very beautiful and large crystals, is in 
GROUND PLAN OF A PORTION OF THE COPPER WORKS AT FRELOFSKI, TURYINSK. 
* : 59 . 
Obs. — In describing these phenomena, 31 . 
Rose has given a plan of the whole' district, 
around the Turyinsk mines, as taken from a 
map published by Colonel l'rotassof in the 
Imperial Russian Mining Journal of 18*2t); 
and also a horizontal ground-plan and vertical 
section of the Frclofski copper- works. That 
ground-plan, drawn by the head captain of 
the mines, Reger, being more extended than 
Otir own, shows more distinctly how the por- 
phvritic greenstone (d) cuts, in di/krs through 
the greenstone (e), as well as through the 
other rocks. (See Reiss nach dem Ural, ike. 
vol.i. plates 8 . and 9 -) 
a. Limestone, b. Garnet rock. c. Copper zone. d. Greenstone porphyry, t. Greenstone 
the details of Professor Henslow with those of M. Gustaf Rose and Colonel Hehnersen, will perceive a 
remarkable analogy in the Welsh and Russian examples of metamorphism. But however the facts may 
be similar, there fan important difference between the views of the Russian authorities and those ot 
Professor Henslow, since the latter shows that the garnet rock of Anglesea is simply the toss.hfevous 
limestone and shale, mineralized and altered by the action of heat and the protrusion of the trap, whilst 
Colonel Hehnersen seems to regard the garnet mass itself as of eruptive origin. We must say we think 
the reasoning of Professor Henslow may also he applied to the case of Turyinsk, whose garnet rock is we 
consider metamorphic— that it is, in fact, like the changed mountain limestone of Anglesea, or the . i u- 
rian limestone near Drammen in Norway (equally charged with garnets), a result of igneous intrusion. 
3 F 2 
