

TABLE OF GEOLOGICAL FORMATIONS IN THE ORDER OF THEIR 

 SUPERPOSITION. BY M. AL. DE HUMBOLDT. 



Alluvial deposites. 



Limestone formation, with millstone (meulieres). 



Sandstone and sand of" Fontainbleau. 



Gypsum with bones. Siliceous Limestone. 



Coarse limestone. 

 (Clay of London.) 



Tertiary sandstone, with lignites (brown coal), 



Plastic clay. Molasse. Nagelfluhe. 



Chalk, 



white, 



soft (tuffeau). 



chloritic. 



Ananchites. 



Green sand. 



Wead clay. Secondary sandstone with lignites. 



Ferruginous sand. 



Ammonites . 

 Planulites. 



Limestone of Jura. 



Quadersandstein, or white sandstone, 

 sometimes above the lias. 



(Muschelkalk. - 

 Ammonites nodosus. 



Slaty beds with fish and 



Crustacea. 



Coral rag. 



Dive clay. 



Oolites and Caen lime 



stone. 

 Marly or calcareous lias 

 with graphcea arcuata 



Marls with fibrous gypsum. 

 Arenaceous layers. 



Saliferous variegated sandstone 



Product, aculcat. 

 Magnesian Limestone. Zechstein 



Coppery slate. 



(Alpine limestone.) 



Quartziferous 

 porphery. 



Co-ordinate formations of porphyry, 

 red sandstone and coal. 



Transition formations. 



Slates with Lydian stone, greywacke, diorites, euphotides. 



Limestone with orthoceratites, trilobites, and evomphalitee 



Primitive formations. 

 Clayey slates (Thonchicfer) , 

 Mica slates. 

 Gneiss. 

 Granites. 





[To face page 136. 



