Chapter III: Section II

PHENOMENA PECULIAR TO UNSTRATIFIED BODIES.

1. Metallic Veins.

p. 57

Veins defined. They contain substances that were once in fusion, §
49, 50. Metallic veins, native metals, &c. § 51. Native copper, §
52. Manganese, § 53. Fragments of rocks included in veins, § 55.
Shifting and heaving of veins, § 56, 57. Veins of different dates,
§ 58. Stratification not found in veins. Coating of the sides,
what, § 59. Metallic veins most common in primitive strata; but
not confined to them, § 60.

2. Whinstone.

p. 66

Enumeration of stones of this genus, § 61. Whin, whether in veins
or in masses, resembles lava, § 62. Is a subterraneous lava,
§ 63. Columnar structure an argument for fusion, § 64. Not
produced by drying, § 65. Whinstone penetrated by pyrites, § 66.
Induration of the strata in contact with whin, § 67 Coal charred
by whinstone veins, § 68. Disturbance of the strata by whinstone
veins, § 69. Phenomena of whin interposed between strata, § 70,
71. Transition from whin to strata not gradual. § 72. Agates and
chalcedonies in whinstone, § 74. This stone melted and reproduced
from fusion by Sir James Hall, § 75. Mineral alkali found in it
by Dr Kennedy, _ib._ Whinstones of different formation, § 76.
Porphyry a species or variety of whinstone, §77.

3. Granite.

p. 82

Granite defined. Exists in masses and veins, § 77. The basis
of other rocks, § 78. Its original fluidity inferred from
the crystallization of its parts, § 79. Its fusion, from the
structure of the Portsoy granite, § 80, 81.--from granite veins,
§ 82. General conclusion as to the igneous origin of minerals, §
83, 84, 85. Actual existence of subterraneous heat known from hot
springs, volcanoes, earthquakes, § 86. Volcanic fire seated deep
under the surface, § 87. Subterraneous heat not accompanied by
burning, § 88, 89. Transmission of subterraneous heat, so as to
produce hot springs, &c. § 90, 91.