710 SEC. 16. GEOLOGY AND MINING. 



50. Ophite from Puerto Real (Cadiz) formed of felspar, hornblende, 



magnetite. 

 c51. Diabase from the Sierra de Cordova, formed of plagioclase, chlorite, 



augite, magnetite. 



52. Garnetiferous amphibolite from Pedraya de la Sierra (Segovia), formed of 



amphibole and garnet. 



53. Garnetiferous amphibolite from Pedraya de la Sierra, composed of 



amphibole and quartz with fluid cavities. 



54. Quartziferous amphibolite from the escorial, formed of amphibole and 



quartz. 



55. Quartziferous ampbibolite from Dilar (Granada), formed of amphibole 



and quartz. 



56. Garnetic quartziferous amphibolite from Toril de Dilay (Granada), 



formed of amphibole, quartz, garnet, and picotite. 



57. Quartziferous amphibolite from Laguna de Bacares (Granada), formed 



of amphibole, quartz, and picotite. 



58. Quartziferous amphibolite from Barranco de les Araligos (Granada), 



formed of hornblende and quartz. 



59. Quartziferous amphibolite from Barranco de los Araligos (Granada), 



formed of hornblende and quartz. 



60. Quartziferous amphibolite from Barranco de los Araligos (Granada), 



formed of hornblende, quartz, garnet, and hematite. 



61. Quartzdiorite from Almaden, formed of plagioclase, hornblende, 



magnetite, quartz, with apatite. 



62. Quartzdiorite from Almaden, insoluble from the action of acids. 



63. Diorite from Peguerinos (Avila), formed of plagioclase, hornblende.* 



64. Idem from Peguerinos (Avila), formed of plagioclase, hornblende. 



65. Idem from Peguerinos (Avila), formed of plagioclase, hornblende, 



magnetite, augite. 



66. Idem from Peguerinos (Avila), formed of plagioclase, hornblende, 



magnetite, viridite, calcite, and quartz. 



67. Diorite from Peguerinos (Avila), formed of plagioclase, hornblende, 



magnetite, viridite, and augite. 



68. Trachyte from Cartagena, formed of sanidin, hornblende, magnetite. 



69. Trachyte from Telde (Grau Canaria), formed of sanidin, magnetite. 



70. Trachyte from Guia (Grau Canaria), vide No. 8 of the collection of 



Grau Canaria Rocks, by M. S. Calderon, formed of sanidin, magne- 

 tite, hornblende. f 



71. Trachyte from Palmas (Grau Canaria), vide No. 5 of the collection of 



Grau Canaria rocks of M. S. Calderon, formed of sanidin, magnetite. 

 70. Trachyte from Grau Canaria, vide No. 7 of collection of Grau Canaria 

 rocks oi M. S. Calderon, formed of sanidin, magnetite, augite, 

 hornblende. 



73. Trachyte from Grau Canaria (No. 9 of collections of Grau Canaria 



rocks, by M. S. Calderon, formed of sanidin, magnetite, hornblende. 



74. Trachyte from La Cumbro (Grau Canaria), No. 3 of the collection ol 



Grau Canaria, by M. S. Calderon, formed of sanidin, magnetite, 

 augite, aragonite. 



75. Tufa from Artenaza (Grau Canaria), No. 53 of the collection of Grau 



Canaria of M. S. Calderon, formed of sanidin, clay. 



* Anales de la Soc. Esp. de Hist. Nat. J. iv. Actas, p. 73, sesion del 1 de Setz. de 1875. 

 Paper read by F. Quiroga. 



t Resina de las rocas de la Isla Volcanica Grau Canaria, por Salvador Calderon. An. 

 Soc. Esp. de Hist. Natural, J. iv. 



