STRATA CONTAINING PETRIFACTIONS, 
SURVEY 
Of the Paleontological Formations, or those Strata of the Earth’s 
Crust containing Petrifactions. 
15 
Rock- ee a Systems: Formations. 5 spain. Some Md 
V. cali 
XIV. Recent 36. Present Upper alluvial 
(Alluvium) 35. Recent Lower alluvial 
Anthropolithic XIII. Pleistocene § 34, Post glacial | Upper diluvial 
(Anthropozoic) - (Diluvium) 33. Glacial Lower diluvial 
groups of strata 
IV. Tertiary XII. Pliocene ; 32. Arvernian Upper pliocene 
=. (Late tertiary) 31. Sub-Appenine | Lower pliocene 
XI. Miocene } 30. Falunian Upper miocene 
Caenolithic (New tertiary) 29. Limburgian | Lower miocene 
(Czenozoic) 28. Gypsum Upper eocene 
groups of strata ee ee 27. Nummulitic | Mid eocene 
( ertiary) 26. London clay | Lower eocene 
25. White chalk | Upper cretaceous 
24. Green sand Mid cretaceous 
/ IX. Cretaceous 23. Neocomian Lower cretaceous 
III. Secondary 22. Wealden The KentishWeald 
Got, 21. Portlandian | Upper oolite 
iene. Saed 20. Oxfordian Mid oolite 
Mesolithic r 19. Bath Lower oolite 
(Mesozoic) 18. Lias Lias formation 
groups of strata 17. Keuper Upper trias 
Vil, Trias 16. Muschelkalk | Mid trias 
15. Bunter sand | Lower trias 
- 14. Zechstein Upper Permian 
II. Primary ee { 13. Lower Permian 
Ati 12. Carboniferous 
V. Carbonic sandstone Upper carbonic 
Paleolithic (coal) 11. Carboniferous 
(Palzeozoic) limestone Lower carbonic 
groupsof strataf IV. Devonian 10. Pilton Upper Devonian 
ahi red sand. 9. Ilfracombe Mid Devonian 
stone) 8. Linton Lower Devonian 
7. Ludlow Upper Silurian 
‘ = eta il. Silurian 6. Llandovery Mid Silurian 
5. Llandeilo Lower Silurian 
, 4. Potsdam Upper Cambrian 
re I. Cambrian ; 3. Longmynd Lower Cambrian 
groups of strata ¥’ Taint 2. Labrador Upper Laurentian 
1. Ottawa Lower Laurentian 
