OOLITIC SERIES. 



73 



IV.— OOLITIC SERIES. 



The Jurassic system, 

 -classified as follows : — 



excluding the Liassic series, may he 



Purheckian. 



Portlandian. 



Kimeridgian. 



Corallian. 



Oxfordian. 



Bathonian. 



BaJGcian. 

 "We are not at present concerned with the Purheckian and 

 Portlandian fossils; the rest of the series includes several sub- 

 divisions, the nomenclature of which varies to some extent in 

 ■different parts of Britain. "We may, however, adopt the following 

 ■classification '■ as convenient for reference in connection with the 

 fossils described in this volume. 



Groups or Stages. 



KlMEEIDGIAN. 

 CoilALLIAIf. 



oxpordian. 



Bathonian 

 (Great or Bath Oolite). 



Bajocian 

 {Inferior Oolite). 



Sui-Groups or Sub-Stages. 

 Kimeridge Clay. 



! Coral Eag. 

 Coralline Oolite. 

 Calcareous Grit. 



( Oxford Clay. 

 ( KeUa-ways Eock. 



Cornbrash. 



Bradford Clay and Forest Marble. 



Great or Bath Oolite, -with Stonesfield Slate. 



Fuller's Earth. 



/ Cheltenham Beds, Lincolnshire Limestones, and CoUy- 



j weston Slate. 



j Northampton Sands. 



\ Midford Sands (passage beds). 



1 Geikie (93). 



