13. Older Quaternary Period or Ice or Glacial Period. 14. Newer Quaternary Period ” Post Glacial Period. 15. Recent Quaternary Period ” Period of Culture. (The Period of Culture is the Historical Period, or the Period of Tradition.) SURVEY _Of the Palæontological Formations, or those Strata of the Earth’s Crust containing Petrifactions._ --------------------+-------------------+----------------------+-------------- _Rock-Groups._ | _Systems._ | _Formations._ | _Synonyms of | | | Formations._ --------------------+-------------------+----------------------+------------- V. _Quaternary { | Group_, { XIV. Recent { 36. _Present_ | Upper alluvial or { (Alluvium) { 35. _Recent_ | Lower alluvial Anthropolithic { | (Anthropozoic) { XIII. Pleistocene { 34. _Post glacial_ | Upper diluvial groups of { (Diluvium) { 33. _Glacial_ | Lower diluvial strata { | IV. _Tertiary { XII. Pliocene { 32. _Arvernian_ | Upper pliocene Group_, { (Late tertiary) { 31. _Sub-Appenine_ | Lower pliocene or { | Cænolithic { XI. Miocene { 30. _Falunian_ | Upper miocene (Cænozoic) { (New tertiary) { 29. _Limburgian_ | Lower miocene groups of { | strata { { 28. _Gypsum_ | Upper eocene { X. Eocene { 27. _Nummulitic_ | Mid eocene { (Old tertiary) { 26. _London clay_ | Lower eocene { { 25. _White chalk_ | Upper cretaceous { IX. Cretaceous { 24. _Green sand_ | Mid cretaceous { { 23. _Neocomian_ | Lower cretaceous III. _Secondary { { 22. _Wealden_ | The Kentish Weald Group_, { or { { 21. _Portlandian_ | Upper oolite Mesolithic { VIII. Jura { 20. _Oxfordian_ | Mid oolite (Mesozoic) { { 19. _Bath_ | Lower oolite groups of { { 18. _Lias_ | Lias formation strata { { { 17. _Keuper_ | Upper trias { VII. Trias { 16. _Muschel-kalk_ | Mid trias { { 15. _Bunter sand_ | Lower trias