LOCALITIES IN EUROPR AND ArRICA. 43 



Mr. Fischbaeli also nientions tliat a concession has l>een •jranted for mining- 

 native quicksilver at the Dardanelles. 



Russia. — Besides some points in the Ural Mountains, whicii will be 

 mentioned under the head of Siberia, a discovery of cinnabar was made by 

 Mr. Minenkoff in southern European Russia in 187!^). The locality is west 

 of the Azof railway, between the stations Nikitoffka and (iavriloffka, and 

 seems to be about eighteen miles southwesterly from the town of l^achmut. 

 The deposits consist of a stratum of sandstone overlain by clay slate. The 

 ore-bearing stratum is in jiart impregnated with cinnabar. It is also trav- 

 ersed by many cracks, in which well-developed crystals of cinnabar are 

 found. The rocks underlying the principal stratum are likewise fissured, 

 and the cracks in it also are sometim.es filled with cinnabar. According to 

 Professor Tschermak galena is intimately mingled with the cinnabar.^ All 

 the rocks belong to the Carboniferous. I'he deposit is said to be rich, and 

 exploitation on a commercial scale was commenced in 1886, as Professor 

 Arzrunf informs me. There are ancient superficial mine workings on the 

 metalliferous beds.^ 



AFRICA. 



Algeria. — Within a few 3'ears there was a mine called the Ras-el-Ma 

 worked fifteen miles southeast of Philippeville, province of Con.stantine. 

 Mr. Tissot states that this deposit occurred in the nummulitic limestone 

 (Eocene) immediately at the contact with argillo-talcose schists. In his 

 opinion the metalliferous emanations were derived from the latter rock. 

 This mine was patented in 1861 and abandoned in 1876. He also mentions 

 a very regular mei'curiferous vein at Taghit, in the valley of the Oued-Abdi. 

 It occurs in the lower Cretaceous.^ Mr. A. Heckmanns informs me that in 

 the province of Algiers, near Palestro, at a locality called Douar Guer- 

 rouma, there are typical veins in upper Cretaceous limestone which carry 

 decomposed blende and lead ores. These ores contain silver and quick- 

 silver, the latter sometimes to the extent of 3i per cent. The quicksilver 

 is not recovered at present. 



' Tschermalis mineral. Mittheil., vol. 7, 18S5, p. 93. 



- M. Hiriakotf : Geol. Fiireningeu.s Stockholm Forhaudl., vol. 8, No. 6, 188(5, 



^Texte explicatif de la carle g^ologique de Constantine, pp. 59 aud 65. Also, Notice g6ol. et min., 

 Ddp. de Constantine, Exp. iiniv. de Pari.'!, 1878, pp. 22 and 23. 



