600 



I. CO-ORDINATE FORMATIONS OF GRANITE, GNEISS, 

 / AND MICASLATE. 



There are countries (in France, the vicinity 

 of Lyons ; in Germany. Freiberg, Naundorf) 



lished nine years ago, Vol. iii, p. 108. 1. Soil, vulgarly 

 called primitive ; granite, gneiss, and micaslate (or oscillat- 

 ing gneiss, between granite and micaslate) ; very little pri- 

 mitive clay-slate j weisstein with serpentine ; granite with 

 disseminated amphibol j amphibolic slate ; veins and short 

 layers of greenstone. 2. Transition soil, composed of frag- 

 mentary rocks, (grauwacke,) calcariferous slate and green- 

 stone (first traces of organization : bambousacees, madre- 

 pores, productus, trilobites, orthoceratites, evamphalites). 

 Complex and parallel formations, a) alternate beds of grey 

 and stratitous limestone, anthracitous micaslate, anhydre 

 gypsum, and grauwacke ; b) clayslate, black-limestone, 

 grauwacke with greenstone, syenites, transition-granite, and 

 porphyries with a base of compact feldspar ; c) euphotides, 

 sometimes pure and covered with jaspar, sometimes mixed 

 with amphibole, hyperstein, and grey limestone ; d) pyroy- 

 enic porphyries with amygdaloides and zirconien syenites. 

 3. Secondary soil, beginning by a great destruction of mono- 

 cotyledon plants, a) co-ordinate and almost contemporary 

 formations with red sandstone (rothes totes tiegende), quarzier 

 porphyry, and fern-coal. These beds are less connected by 

 alternance than by opposition. The porphyries issue (like 

 the trachytes of the Andes), in domes from the bosom of in- 

 termediary rocks. Porphyrific brechias, which envelope the 

 quarzifere porphyries, b) Zechstein or Alpine limestone, 

 with marno-bituminous slate, fetid limestone, and variegated 

 gypsum ; Productus aculeatus. c) variegated sandstone (bunte 

 sandstein) with frequent beds of limestone ; false oolithes - y 



