CHAPTER V. THE OLD RED SANDSTONE 67 CHAPTER VI. THE CARBONIFEROUS SYSTEM 83 CHAPTER VII. SECONDARY FORMATIONS. 1. _The New Red Sandstone_ 106 CHAPTER VIII. SECONDARY ROCKS. 2. _The Oolitic System_ 123 CHAPTER IX. SECONDARY ROCKS. 3. _The Oolite proper_ 145 CHAPTER X. SECONDARY ROCKS. 4. _The Wealden_ 175 CHAPTER XI. SECONDARY ROCKS. 5. _The Chalk. The Cretaceous System_ 198 CHAPTER XII. THE TERTIARY SYSTEM 224 CHAPTER XIII. SCRIPTURE AND GEOLOGY; OR, APPARENT CONTRADICTIONS RECONCILED 255 LIST OF ILLUSTRATIONS. BY S. & G. NICHOLLS. PAGE BASALTIC COLUMNS, REGIA, MEXICO _Frontispiece._ SECTION OF THE EARTH’S CRUST 16 DITTO 21 LONDON BASIN 25 SECTION OF DITTO 25 ARTESIAN WELL 27 MINING DISTRICT 41 SECTION OF A MINE 43 TRILOBITE 56 DITTO 57 EYES OF DITTO 58 CRYSTALLIZATION ON CORNISH SLATE 60 BELLEROPHON 61 SILURIAN REMAINS 61 DITTO 62 CORALLINE 62 LAND’S END 66 FISH SCALES 74 FISH TAILS 75 CEPHALASPIS 76 COCCOSTEUS 77 PTERICHTHYS 78 OSTEOLEPIS 79 EXTINCT AND EXISTING FERNS 87 FLORA OF THE CARBONIFEROUS SYSTEM 95 ASTEROPHYLLITE AND SPHENOPTERIS 97 PECOPTERIS, ODONTOPTERIS, AND NEUROPTERIS 98