ri CONTEXTS. 



MINERALOGY. 



PAOB 



Primitive Formations of the Earth 890 



First Class. STRATIFIED MOUNTAINS. Primitive Eocks. 401 



first Order. TRANSITION FOKMATIOX 4ol 



Second Order. TERTIARY FORMATION .. 404 



Third Order. SECONDARY KOCK FORMATION. Floetz-gebirge 405 



L CRETACEOUS FORMATION 406 



II. J UK A FORMATION '. 407 



III. TRIAS FORMATION 40!) 



Fourth Order. SEDIMENTARY KOCKS 411 



Second Class. MASSIVE ROCK FORMATION 415 



First Order. PRIMITIVE MOUNTAINS 415 



Second Order. VOLCANIC KOCKS 417 



SPECIAL MIXERALOG-Y. 



First Class. EARTHY MINERALS . . 4-23 



First Order. SILICA 4-J3 



Second Order. ALUMINA. Clay 4-29 



Third Order. TALC 437 



Fourth Order. LIME 4:39 



SecondClass. SALTS 444 



First Order. SALTS OF ALUMINA 4i4 



Second Order. A LK ALINE SALTS 44.5 



Third Order. MF.LLITE OK ALUMINA 447 



Fourth Order. METALLIC SALTS 447 



Third Class. COMBUSTIBLE MINERALS 443 



First Order. CARBON COAL 449 



Second Order. MINERAL KESIN OR PITCH 451 



Third Order. MINERAL OILS 452 



Fourth Order. METALLIC EARTHS 453 



Fourth Class. METALLIC ORES 4M 



First Order. EARTHS CONTAINING METALS 454 



Second Order. METALLIC STONE ORES UNITED WITH ACIDS 459 



Third Order. ORE? COMBINED WITH SULPHUR 462 



Fourth Order. PI-RE NATIVE ORES , . . . 46T 



