THE 



WONDERS OF GEOLOGY. 



LECTURE I. 



1. Introductory. 2. Nature of Geology. 3. Harmony between Revelation and 

 Geology. 4. Duration of geological Epochs. 5. Structure of the Earth. 6. Geo- 

 graphical Distribution of Animals and Plants. 7. Temperature of the Earth. 

 8. Nature of the Crust of the Globe. 9. Classification of Rocks. 10. Geological 

 Mutations. 11. Connexion of Geology with Astronomy. 12. Nebular theory of 

 the Universe. 13. Various states of the Nebulae. 14. Formation of the Solar 

 System. 15. Gaseous state of the Earth. 16. Geology elucidated by Astronomy. 

 17. Aerolites. 18. Origin of Aerolites. 19. Existing geological Agents. 20. 

 Aqueous Agency: the effects of Streams and Rivers. 21. Deltas of the Ganges 

 and Mississippi. 22. Formation of Fluviatile Strata. 23. Ripple-marks. 24. 

 Lewes Levels. 25. Remains of Man in modern Deposits. 26. Peat Bogs. 27. 

 Conversion of Peat into Coal. 28. Subterranean Forests. 29. Geological effects 

 of the Ocean. 30. The Bed of the Ocean. 31. Effects of Currents. 32. Icebergs 

 and Glaciers. 33. Incrusting Springs. 34. Incrustations. 35. Lake of the 

 Solfatara. 36. Marble of Tabreez. 37. Stalactites and Caverns. 38. Consolidation 

 of loose Sand. 39. Destruction of Rocks by. Carbonic Acid. 40. Carbonic Acid 

 in Caves. 41. Consolidation by Iron. 42. Recent Limestone of the Bermudas. 

 43. Fossil human Skeletons. 44. Isle of Ascension. 45. Drifted Sand. 46. For- 

 mation of recent Sandstone. 47. Siliceous depositions. 48. The Geysers of 

 Iceland. 49. Siliceous Thermal Waters of New Zealand. 50. Artificial Solution 

 of Silex. 51. Hertfordshire Pudding-stone. 52. Effects of high Temperature. 

 53. Volcanic agency. 54. Subsidence and Elevation of the Temple at Puzzuoli. 

 55. Historical Evidence. 56. Causes of these changes. 57. Elevation of the 

 Chilian Coast. 58. Raised Sea-beach at Brighton. 59. Elevation of Scandinavia. 

 60. Mutations in the relative Level of Land and Sea. 61. Retrospect. 



1. Introductory. — An eminent philosopher* has justly 

 remarked, that in order to obtain a proper sense of the 

 interest and importance of any science, and of the objects 

 which it embraces, nothing more is necessary than the 



* Professor Sedgwick. 



