496 Notices and Extracts from the Minutes of the Geological Society. 



Germany ^ Hungary ^^ the southern Alps^, Russia*, and the northern shore 

 of the Black Sea^, that the great mining districts of all these countries are 

 immediately connected with unstratified rocks : and in further support of this 

 solution of the first question, he mentions the metalliferous porphyries of 

 Mexico*', and the auriferous granite of the Orinoco'; but he observes that 

 his knowledge of the mining countries of South America is not sufficient to 

 enable him to state their general geological connexions. 



With reference to the second question, — the probable association of me- 

 tallic veins with unstratified rocks, though the latter are not visible in the 

 immediate neighbourhood of the former, — the author gives a section of the 

 country between Valorsine and Servoz^, and points out the probable exten- 

 sion of the granite of Valorsine under the Aiguelles Rouges and Breven, 

 composed of protogine, chlorite, and talcose schists, to the immediate vicinity 

 of the mines of Servoz, which are situated in the latter formation. He also 

 refers the reader for further illustration to the metallic deposits of Wanlock- 



de Saulnot, Annales des Mines, lere Serie, tome xi. p. 393. Annates des Sciences Naturelles, 

 tome xvi. p. 285. Le Coq et Bouillet, Vues et Coupes des Formations de VAuvergne, pp. 72, 77. 

 Annales des Mines, 2ieme Serie, tome vii., 1830. De Bonnard, Sur une Formation MetalUfere du 

 Depart, de la Charente, Annales des Mines, lere Serie, tome viii. p. 491. 



' Heron de Villefose, Atlas de la Richesse Minerale, Planches II. et III. Boue, Memoire sur I'Al- 

 lemagne, Journal de Physique, Mai 1822, tome xciv, p. 297, et seq. ; Geognostisches Gemdlde von 

 Deutsckland, pp. 120, 125, 140, 143. Von Buch, Brief e ilher Sildlichen Tyrol, pp. 172, 188, and 

 Atlas. Sedgwick and Murchison on the Austrian Alps, Geol. Trans., Second Series, vol. iii. p. 301 . 



- Beudant, Voyage Mineralogiqiie et Geologique en Hongrie, 1822. Elie de Beaumont, Coup 

 d'ceil sur les Mines, p. 69, et Dictionnaire des Sciences Naturelles, tome xxxi. p. 376, et seq., Art. 

 Mines. Boue, Geognostisches Gemdlde von Deutschland, pp. 117, 118, et Planche VII. 



^ Maraschini, Sulle Formazioni delle Rocce del Vicentino, p. 145 — 149. Brochant, Sur les 

 Roches Granitdides du Monthlanc, ^^c, Annales des Mines, lere Serie, tome iv. p. 297, et seq. 



* Patrin, Apper^u des Mines de Siberie, Journal de Physique, tome xxxiii. p. 81, 1788. Hermann, 

 Versuch einer mineralogischen Beschreihung der Uralischen Erzgehilrgcr, 1789. Elie de Beau- 

 mont, Coup d'ceil sur les Mines, pp. 79, 128, and Dictionnaire des Sciences Nat., tome xxxi. 

 p. 385, et seq., Art. Mines. Patrin, Notice Mineralogique de la Daourie, Journal de Physique, 

 tome xxxviii. p. 225, 1791. Engelhardt und Parrot, Reise in die Krym wid den Kaukasus, vol. ii. 

 pp. 187, 264. Kupfer, Rapport fait a VAcademie des Sciences de Petershourg sur son Voyage a 

 I'Elhrouz, 1830. 



' Pallas, Second Voyage, French Trans., tome ii. p. 278 — 28G. 



* Humboldt, Essai Politique sur le Mexique, 4to, torn. ii. pp. 494, 516, et seqq. Elie de Beau- 

 mont, Coup d'ceil sur les Mines, p. 67, and Diet, des Sciences Nat., tome xxxi. p. 371, et seq.. Art. 



MWES. 



" Humboldt, Relation Historique du Voyage, 8vo, tome vi. p. 264. 



» Jovrnal des Mines, tome i. No. 5. pp. 32, 33, et seq. L. A. Necker, Memoire sur la Vallic 

 de Valorsine, Mem. de la Societe de Physique et d'Hist. Nat. de Geneve, tome iv. 



