| | PAGE | | GENERAL CONSIDERATIONS | 1 | | Consideration of Fossils | 4 | | Chemical and Nebular Hypotheses of the Globe | 15 | | Modifications of the Earth’s Surface | 26 | | ERUPTIVE ROCKS | 30 | | Plutonic Eruptions | 31 | | Granite | 31 | | Syenite | 34 | | Protogine | 35 | | Porphyry | 37 | | Serpentine | 38 | | Volcanic Rocks | 39 | | Trachytic Formations | 39 | | Basaltic Formations | 44 | | Volcanic or Lava Formations | 51 | | Metamorphic Rocks | 71 | | General Metamorphism | 74 | | THE BEGINNING | 80 | | PRIMARY EPOCH | 99 | | Cambrian Period | 101 | | Silurian Period | 102 | | Lower Silurian Period | 104 | | Upper Silurian Period | 110 | | Old Red Sandstone and Devonian Period | 119 | | Carboniferous Period | 130 | | Carboniferous Limestone | 140 | | Coal Measures | 150 | | Formation of Coal | 159 | | Permian Period | 170 | | Permian Rocks | 177 | | SECONDARY EPOCH | 185 | | Triassic, or New Red Period | 185 | | New Red Sandstone | 187 | | Muschelkalk | 188 | | Keuper Period | 199 | | RhÆtic (Penarth) Period | 207 | | Jurassic Period | | |
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