CONTENTS. tions, viz. the ncweft floetz-trap, and the newer por phyry formations. - The newer porphyry formation formed by a rifing of the waters of the globe, before the 'fummits of the mountains appeared above the level of the ocean.—The neweft fl®tz-trap formation formed . by a rapid rifing and retiring of the waters of the ocean, at a time when the furface of the earth was cq- vered by a great variety of animals and vegetables. 46. General obfervations on the Contents of the waters of the globe, at different periods, and a defcfiption of the different formation fuites: i. Limeftone : 2. Slate : 3. Trap : 4, Porphyry.: 5. Gypfum : 6. Salt: 7. Coal: 8. Serpentine. 47* The periods and hinds of forma tions ufed as the bafis for an arrangement of the dif ferent mountain-rocks.—Table of the different moun- tain-rocks, as divided into primitive, tranfition, fleet?, alluvial, and volcanic. CHAP. VI. Cl. I.—Primitive Rocks; Urgebirge, Wer. P. 100 § 48. General obfervations, and enumeration of the diffe rent primitive rocks—1. Granite: 1. Origin of the name: 2. Its conftituent parts : 3. Diftinft concretions : 4. Stratification: 3. Foreign beds: 6. Formations: 7. Cliffs: 8-Mode of decompofition: 9. Metalliferous na ture: xo. Geographic diftribution and extent: 11. Is the moft fimple of the primitive rocks 2. Gtieifs: x. Ori gin of the name . 2, Conftituent parts ^ ,3. Stratifica tion : 4. Foreign beds: 5. Shape of its’ mountains: 6. Metalliferous nature : 7. Geographic diftribution. 3 ■ Mica-Jlate : i. Conftituent parts: 2. Stratifica tion : 3. Foreign beds: 4..Shape of its mountains; 5. Metalliferous