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INDEX.
351
L
Lacustrine deposits in tertiary strata, i. 273. In post-tertiary strata, ii. 1. 36. Of the Eocene period, 41. Of the Middle Tertiary period, 43. Of the Pleiocene period, 48. Modern, 53.
Ladrone Islands, volcanic chain of the, ii. 232.
Lakes, on the course of rivers, remarks on their influence in changing the earth's surface, ii. 2327. Deep. 24. Shallow, 27.
Of the Pleiocene period and their deposits, 48.
Llanberis, purple slates of, i. 130. Valley of, 134.
Llandeilo, rocks of, i. 124.136. Table of their formation, 139.
Llandovery, metamorphic slates of, i. 137.
Lamarck, M., reference to his group of echinodermata, i. 76.
Lamination, prevalence of, among schists, i. 114. In coal formations, 163.
Lammermuirs, dip of stratified rocks from the chain of the, i. 37. Silurian strata of, 147.
Lancashire, coal deposits of, i. 180.
Lancaster, position of strata at, i. 39.
Land and sea, distribution of the globe into, ii. 286. Outline of, 320.
Lands, new, their formation at the mouths of rivers, ii. 27. Displacements of, from convulsive movements of the earth, 240. 292.
Langdale, clay slate of, i. 126. 129.
Languedoc, plains of, rise of strata from, i. 37.
Lartet, M.. his discovery of remains of quadrumana, i. 100.
Laplace, his speculation on the planetary masses, i. 31.
Lava, greystone, of Calabria, analysis of, ii. 95. Diversified appearance of, 209. Composition of, 209. Curious description of its effects when liquid, 210. See Volcanos.
Lead Hills, metallic deposits of the, ii. 161.
Lead mine of Strontian, i. 122. Of Nant y Moen, and the Shelve district of Shropshire, 149.
Lead, ore, in what proportions found in the mines of Freyberg, ii. 174. "Throw" of, in mines of Aldstone Moor, 176. Lead mines of Cornwall, 176.
Lee, Mr., his contributions to geology, ii. 56. 68.
Lehman, M., extract from his work on "Mineralogy," ii. 193.
Leibnitzian theory. See Geology and Geological Theory.
Leslie, his statement of the relative weights of water, mercury, and air, at different depths below the earth, i. 27. His experiments on heat, ii, 266.
Lettry, coal mines of, their temperature, ii. 275.
Levant tin and copper mine, temperature of, ii. 271.
Lewis, serpentine found in, 121.
Lias, where found, i. 226, et seq.
Life, organic, traces of, not discoverable in gneiss and mica schist, i. 118.
Lignitic deposits in Cainozoic strata, i. 273.
Lime, proportion of oxygen in, i. 21
Limestone, proportion of oxygen found in, i. 25. Oceanic types of, 245. Changed by action of igneous rocks, ii. 126. Experiments in illustration of, 129, 130. Powdered, converted into stone, 130. Dolomitic, 133.
Limestone, carboniferous. See Carboniferous Limestone. Its extent in England and on the Continent, i. 58. Peculiarities of the districts of, in England, 176, 177.
Limestone, magnesian, limited range of, in the north of England, i. 36. Peculiarities of districts of, in England, and their extent, 176-178. See Magnesian Limestone.
Lincolnshire, fen lands of their breadth, to what cause attributed, ii. 32.
Lindley, Dr., result of his experiments on land plants, i. 70. 104.
Linnaeus, his zoological researches, i. 91.
Lipari Isles, volcanos of the, ii. 218.
Lisbon, earthquake of, ii. 241.
Logan, Mr., geological researches of, i. 144. 188.
Lomond, Loch, stratification easily found in the chloritic schists of, i. 115. Succession of strata at, 117.
Lonsdale, Mr., geological researches of, i. 155. 162.
