The Geological Column in 1822 



Present American 





O.&P. 



Wer- 



Other 



classification 



Conybeare and Phillips 1822 



orders 



nerian 

 orders 



writ- 

 ers 



Psychozoic or Eecent 



Alluvial 





to 



02 









J-H 



03 



02 









r3 



o 



GO 



o3 





Pleistocene 



Diluvial 



o 



3 



© 



O 



Q 



S=[Neo.,ene 



Upper Marine formation (Crag, 



to 



o 



o 

 +3 



>> 



o 



Bagshot sand, and Isle of Wight) 



1 



.2 



o 



Freshwater formations 



CO 

 03 





O 



a C e ene i Me ^- 



London Clay 



02 





H 





Plastic Clay 









Cretaceous 



Chalk 



Beds between Chalk and Oolite 











Comanchian 1887 



Series (Chalk Marie, Green Sand, 

 Weald Clay, Iron Sand) 













' 



Upper Oolitic division (Purbeck 



u 





CO 



o 







beds, Portland Oolite, Kimmer- 



*% 



QQ 



CD 

 go 









idge Clay) 



O 



1 



CO 



03 



o 







Middle Oolitic division (Coral Kag, 



3 

 S 



03 



© 









Oxford Clay) 



© 



>i 



t^\ 



Jurassic 1829 -< 





Lower Oolitic division (Cornbrash, 



<B 



£ 



03 









Stonesfield Slate, Forest Marble, 





CD 



o 



n3 









Great Oolite, Fullers' Earth, In- 



03 

 ft 



5 



O 









ferior Oolite, Sand and Marie- 







CD 

 OB 









stone 











I 



Lias 











Triassic 1834 



New Red Sandstone 

 Magnesian Limestone 





03 







Permian 1841 



e 



03 





Coal Measures 



u 





_o 



Pennsylvanian 1891 





03 o O 





03 



"o 



N 



Mississippian 1869 



Millstone Grit and Shale 



*r5^ go 



d 



c3 



o 



jOi 



Ah 



Devonian 1839 

 Silurian 1835 



Old Red Sandstone 



So 8 



03 



*02 



g 



^5 



CD 







CD 





Ordovician 1879 







H 







(=Lower Silurian 1835) 









M 





Cambrian 1833 



Unresolved 

 Submedial 





1 





JO 



"o 



Keweenawan "} # « 



CD 



o 

 u 



CD 



Animikian 1 "3 S3 

 Huronian i - § 2 









*4-3 



o 



J-l 



Sudburian J ^ 



and 





"Eh 



Pw 



, 



• i CO 





o 



^ £i£ 











o o 



Keewatin ( £2 



Inferior Orders 











Coutchiching t 2 fl 











<3 



J t3-|3 











