42 QUICKSILVER DEPOSITS OF THE PACIFIC SLOI'E. 



minerals are clio,lcedony, quartz, calcite, dolomite, barite, and iron oxides. 

 Chrome ii'on is disseminated in the serpentine and the gangue. The ore 

 is found in seams and stringers of quartz and heavy spar, which intersect 

 the vein matter in all directions, and also in impregnations. Prof von 

 Groddeck regards the deposits as intimatel}" related to a fissure system 

 and of a vein-like character, but infers from the micro-structure of the ore 

 that it has in part replaced serpentine. In a series of specimens from Avala, 

 shown to me by Professor Arzruni in Aachen, this replacement is not ap- 

 parent. Messrs. de Prado, Monasterio, Kuss, and others consider a portion 

 of the ore of Almaden to have been substituted for sandstone or quartzite, 

 and Mr. Lipoid believed that ore had replaced a part of the Idrian schist 

 (Lagerschiefer). One would expect, in all these cases, to find descriptions 

 of rounded kernels of rock inclosed by more and more angular envelopes 

 of ore, the outermost bounded by irregular fissure surfaces, for this struct- 

 ure is usually associated with pseudomorphism. I do not find such de- 

 scriptions nor have I seen any such occurrences in California, where cinnabar 

 is often met with in contact with serpentine, sandstone, and schist. Neither 

 have I seen anything of tlie kind at Almaden, at Idria, or at the Tuscan 

 mines. 



Turkey in Europe. — Mr. W. Fisclibach^ examiucd workable deposits of cin- 

 nabar and native (piicksilver in the neighborhood of Prisren, in Albania- 

 This place T take to be identical with Prisrend or Perserin, eighty miles 

 east-northeast of Scutari and about four miles from the river Drin. He 

 also reports occurrences at Crescevo, in Bosnia. There is a town Kreshevo, 

 perhaps equivalent to Crescevo, near Serajevo, in Bosnia. Mr. A. Conrad- 

 examined deposits in the Inatch Mountains, near Serajevo. They are in- 

 closed in schists and limestones and are nearly vertical, sometimes forming 

 veins and sometimes beds. The vein matter consists of country rock, cal- 

 cite, and dolomite. The cinnabar inclosed in the vein matter is accompa- 

 nied by pyrite, blende, and, it would appear, by traces of gold. Some of 

 the deposits are several meters in thickness and, Mr. Conrad believes, could 

 be exploited with profit if operations should be intelligently conducted. 



'Berg- iiud liuttenm. Zeitung, vol. 32, 1873, p. 109. 

 "Revue <Je g(^oI., vol. ■'J, 1865-'6(), p. ll.'i. 



