1. Connexion between the subjects treated of in the former parts of this work and those to be discussed in the present volume; 2. Arrangement of the materials composing the earth's crust; 3. Different circumstances under which the secondary and tertiary formations may have originated; 4. Chronological relations of mineral masses the first object in geological classification; 5. Classification of tertiary formations in chronological order; 6. Newer Pliocene formations; 7. Marine and volcanic formations at the base of Etna; 8. Speculations on the origin of the Val del Bove on Etna; 9. Origin of the newer Pliocene strata of Sicily; 10. Tertiary formations of Campania; 11. Newer Pliocene freshwater formations; 12. Geological monuments of the older Pliocene period; 13. Crag of Norfolk and Suffolk; 14. Volcanic rocks of the older Pliocene period; 15. Miocene period; 16. Miocene alluviums; 17. Eocene period; 18. Marine formations of the Eocene period; 19. Volcanic rocks of the Eocene period; 20. Eocene formations, continued; 21. Denudation of secondary strata during the deposition of the English Eocene formations; 22. Denudation of the Valley of the Weald, continued; 23. Secondary formations; 24. On the relative antiquity of different mountain-chains; 25. On the rocks usually termed 'primary'; 26. On the stratified rocks usually called 'primary'.
Charles Lyell profoundly influenced Charles Darwin with his pioneering geological research, which here focuses on periodising rock formations.