APPENDIX A: GEOLOGICAL COLUMN. 

 Development of Geological Column — Continued. 



683 



De La Beche, 1851. 



Lyell, 1855. 



'ertiary o 

 < iainozoic. 



Secondary 

 Mesozoic. 



id. Mineral accumu- 

 lations of the 

 (A. Upper Tertiary s present time. 



b. Pleistocene, 

 j I c. Pliocene. 



B. MiddleTertiary. a. Miocene, 

 (c. Lower Tertiary, a. Eocene. 



'a. Chalk or M aes- 

 tricht of Den- 

 mark. 



b. Ordinary chalk, 

 with or without 

 Hints. 



c. Merstham beds, or 

 Upper (J ree n - 

 sand. 



d. Gault. 

 r. Shanklin sands, 



Neocomian. or 



Lower G r e e n - 



sand. 

 a. Weald en. 

 6. Hastings sands. 

 c. Purbeck beds. 

 <;. Portland or Oolitic 



limestone. 



c. Portland sands. 



d. Kimmeridge clay. 



e. Coral rag. 

 /. < )xfnrd clay. 

 g. Cornbrash. 

 It. Forest marble. 

 i. Fuller's earth. 

 k. Interior Oolite. 

 I. Lias (Upper a n d 



Lower). 



a. Variegated marls. 



b. Muschelkalk. 



c. Red Sand st one 

 (Bunter, etc.). 



a. Zechstein. 



b. Rothe todte lie- 

 gende. 



Coal Measures. 



'A. Cretaceous 

 group. 



B. Marine equiva- 

 lents of Creta- 

 ceous group. 



C. Jurassic or Oo- 

 litic group. 



M>. Trias group 



A. Permian group- 



Primary < i r, 

 Paleozoic. 



-[.,. 



( . Carboniferous 



B. Marine equiva 

 Lents of 



Carboniferous and 



Mountain lime- 

 limestone group.1 , . , stone ' et .°- 



y \b. Carboniferous 



slates. 

 Various modifica- 

 tions of Old Red 

 Sandstones. 



1' 



D. D e v n i a n 



|«. Upper. 

 Silurian group* 6. Middle. 

 \e. Lower. 



\F. Cambrian 



Various rocks subja- 

 cent to the Silurian 

 series in Wales and 

 Ireland and above 

 the mica and chlo- 

 rite slates, etc. 



Post Tertiary ( £ gSSrMooan* 



& g [Pliocene. ...{ J g ff «£«. 



2 E.i I Miocene 5. Miocene. 



£ 3 g "1 f 6. Upper Eocene. 



Jjg Eocene > 7. Middle Eocene. 



I 8. Lower Eocene. 



Cretaceous.. 



Jurassic 



Triassic • 



9. Maestricht beds. 



10. Upper white chalk 



11. Lower white chalk 



12. Upper Greensand. 



13. Gault. 



14. Lower Greensand. 



15. Wealden. 



16. Purbeck beds. 



17. Portland stone. 



18. Kimmeridge clay. 



19. Coral rag. 



20. Oxford clay. 



21. Great or Bath 



Oolite. 



22. Inferior Oolite. 



23. Lias. 



24. Upper Trias. 



25. Middle Trias or 



Muschelkalk. 



26. Lower Trias. 



Permian 27. 



Carbonifer 

 ous. 



(28. 



r 



Devonian - --•Jo-j' 



sllurian {£ 



Cambrian... -{st 1 



Permian or magne- 

 sian limestone. 



Coal Measures. 



Carboniferous 

 limestone. 



Upper Devonian. 



Lower Devonian. 



Upper Silurian. 



Lower Silurian. 



Upper Cambrian. 



Lower Cambrian. 



