TABLE OF GEOLOGICAL PERIODS AND FORMATK 



PEKIODS. 



Tertiary 



or 

 Cainozoic. 



Secondary 



or 

 Mesozoic. 



f RECENT. 

 PREHISTORIC. 

 PLEISTOCENE. 



PLIOCENE. 



MIOCENE. 

 [OLIGOCENE.] 



EOCENE. 



CUETACEOUS. 



JURASSIC. 



Primary 



or 

 Palaeozoic. 



SOME EUROPEAN FORMATIONS. 



TRIASSIC. 



PERMIAN. 



CARBONIFEROUS. 



DEVONIAN and 

 OLD RED SAND 



STONE. 



SILURIAN. 



ORUOVICIAN. 



CAMHHIAN. 



Upper. Val d'Arno, etc. (see p. 426 

 Lower. Marine Crags. 



Pikermi, etc. (p. 424). 



Upper. Oeningen. 



Middle. Sansan, etc. (p. 423). 



Lower. Ronzon, etc. (p. 422). 



Upper. Hordwell, etc. (p. 421). 

 Middle. Bracklesham, etc. (p. 420). 

 Lower. London Clay, etc. (p. 420). 



Basal. Rheims (Cernaysian). 



( Upper. Danian (Maastricht). 

 Senoniau (U. Chalk). 



ITuronian (L. Chalk, etc.). 

 Cenomanian (U. Greensand' 

 Albian (Gault). 

 V, Lower. Neocomian (L. Greensaud). 



' Upper. Wealden. 



Purbeckian. 



Portlaudian. 



Kimmeridgian. 



Lithographic Stone of Bavai 



etc. 

 Middle. Corallian. 



Oxfordian. 

 Lower. Bathonian or Lower Oolites 



Lias. 



Upper. Rhsetic and Keuper. 



Muschelkalk. 

 Lower. Bunter. 



Upper. Magnesiau Limestone. 



Marl Slate (Kupferschiefer) 

 Lower. Rothliegendes. 



( Upper. Coal Measures. 

 Millstone Grit. 



I Lower. Carboniferous Limestone , 

 Lower Scottish C 

 Measures. 

 Calciferous Sandstones. 



( Upper. Sandstones with Holoptycl 



and Bothriolepis. 

 H < Lower. Strata with Osteolepi* 



Pterichthys. 

 \ Passage Beds. 



Upper. Ludlow 

 Wenlock. 

 Llandovery. 



