EARTHS. AGGREGATE. 60. Gnciffum, 



'83 



Found in moft mountainous countries of Europe^ in innumera- 

 able varieties of proportion, comhination, diiliribution, co- 

 lour, and hardnefs, and is chiefly covered with argillaceous 

 flate, fand, and limeftone: it is formed of diftinft plates laid 

 on each other, and feparatcd by thin layers of mica, and is 

 generally rich in metallic ores : it is ufed for laying the beds 

 of large melting furnaces, 



mMceum. Confiding of the greater part mica, and quartz. 



Giimmerfchiefer. Werner ClaJJif. p. lo. fed, 9. 



Shiftofe mica, Kirnvan. miner, i. p. 348. 



Micaceous ihiftus. ThomJ'oH chem. 4. p, 131, 



Found in biorivay^ forming entire mountains, of a lilvcry co- 

 lour and fplcndour : the plates of mica arc extremely thin and 

 clofcly compacted together, fo as to form diftind tables; the 

 quartz is generally difpofed in fmall veins, granulations, or 

 larger ftrata, 



tdpinnm. Confifting of quartz, mica, and garnets. 



Saxum micaceum. ^yst, «/?/. xii. 3. />. 77. n. 22. 

 Saxum quarfzo. WalLfyst. i. /. 412. ». 7, 

 Pound in moft lofty alpine mountains of Europe: the mica Is 

 . moftly filvery, fometimes predominant, fometime.s pretty 

 equally dillributed, fometimes hardly vifible: the garnets are 

 more commonly red than brown, fometimes of a common 

 form and of conliderable fize, fometimes cr) llallized and Icfs : 

 the plates of which it is ccmpofed are frequently undulate : 

 fometimes there is found with it a portion of Ihorl, talc, or 

 feldfpar: when the quartz is in greater proportion it is made 

 into mill-ttones. 



iccrlinum, Confifting of quartz, mica, and fhorl; 



Found in the mountains 0*1 Siuitzerlandy eipecially St. Gotlherd's, 

 in thofe oi Hungary near SchemnitXt and containing veins of 

 gold or filver, and in thofe of Bohemiuy Saxony, and Norn.vay, 



altenher- Confifting of quartz, mica, and (horllte. 

 gense. Found near Altenberg in Saxony, having veins of tin within it. 



radians. Confifting of quartz, mica, and a£linote. 



CronH, mineral, feSl. 261 33. 



Saxum quartzo, &c. Wall, fy it. l./. 413. «. 8, 



Found in Jemtia in S<njoeden» 



Saxonum. Confifting of quartz, mica, and feldfpar. 



Gneifs. Werner Clafif, p. 8. fea. 8. 



Found in the mountains of Saxony, Bohemia, SivitzerJand, and 

 Sile/ia, rarely in the Carpathic mountains, in great varieties 

 of propordon, colour and corftituent parts : the mica is gene- 

 rally predominant, and the feldfpar the leaft. 



