748 



INDEX. 



Gorrllwyn-fach, Caermarthenshire, Lower Silurian fossils, 637 et 

 seq. 



Gorstey Common, near Newent, Upper Silurian Rocks, 442 



(PI. 36. f. 11.), 723. 

 Gorstley Rough, Clee Hills, carboniferous limestone faults, 118, 



119, 120. 



Gorsty Hill, Dudley, volcanic grit of, 468. 



Gouldtrop road, Pembrokeshire, sea cliffs of, 403. 



Goylan-goch, Caermarthenshire, gravel of, 520. 



Gradual changes of level compatible with central heat, 576. 



Graham Island, eruption of, 71, 230. 



Graham, Mrs. (now Lady Calcott), elevation of Chili, 545. 



Graig Hills, Brecon anticlinal (Silurian Rocks), 337. 



Granitic Rocks, described, 69. 



■ , their igneous origin, 74. 



■ bowlders, 535. 



— , how transported, 536 et seq. 



Gravel, diluvial. See Drift. 



-, absent in central Herefordshire, 516. 



Gravenor Bridge, Salop, greenstone dyke, 262. 

 Grauwacke, term of German mineralogists, 6, 371, 387. 

 Gray, Mr., of Dudley, collection of organic remains, 492. 

 Great Malvern. See Malvern. 



Great and Little Ness, Salop, New Red Sandstone of, 296. 



Green, Mr., on trilobites, 8, 217, 648, 659. 



Greenough, Mr., on Silurian Rocks in Belgium, 7. 



-, Geological Map of England and Wales, xxx. 



4, 5, 16, 185, 371, 535. 

 , on the cornstones of the New and Old Red 



Sandstone, 55. 



, on limestone with coal, 97. 



Greenstone denned, 69. See Trap Rocks. 



— , provincial name for perishable stone, 204. 



Gres bigarre, equivalent of in New Red Sandstone, 36, 45, 727. 



of Germany, fossil plants of, 44. 



des Vosges, equivalent of Lower New Red Sandstone, 54, 



65. 



Griffith, Mr., Geological Map of Ireland, xxvii. 



, on basalt and syenite in Ireland, 76. 



Grimmer Rocks, trap, 268, 272, 276. 

 Grindstones of Lower New Red Sandstone, 60. 

 Grinshill Cliff, New Red Sandstone, 37, 39, 40, 727, 734. 

 and Hawkstone sandstone, 41. 



— — , shown to be the equivalent 



of the sandstone of Bromesgrove, Ombersley, Warwick, 

 &c, 42 et seq., 727. 



Grongar Hill, Caermarthenshire, passage from Silurian to Cam- 

 brian Rocks, 357. 



Griig quarries, Caermarthenshire, Llandeilo limestone, 356 

 (PI. 34. f. 7.), 720. 



Guettard, M., on the extinct craters of Auvergne, 69. 



■ , on trilobites, 646. 



■ , references to his Memoires (corals), 682 et seq. 



Gmlsfield, Montgomeryshire, Caradoc Rocks, 305. 



— — — , fossils at, 636 et seq. 



Gullet Wood, Malverns, Lower Silurian fossils, 638. 

 Gupton Burrows, Pembrokeshire, submerged forest on the shore 

 near, 563. 



Gutter, a coal seam of the Clee Hills, 112, 113, 115. 

 Gwastaden Hills, Radnor, quartzose, slaty sandstones of, 317. 

 Gwendwr, Brecon, 340. 



Gwern-y-fad, near Builth, trap and Silurian strata, 324, 332. 

 Gypsum, with rock-salt in Worcestershire, 31. 



Habberley valley, Salop, altered rock and trap, 263. 



. , igneous action in, 286. 



Hadley near Ombersley, plants of New Red Sandstone, 65. 

 — Lilleshall, trap, 107. 



Haffleld Camp near Ledbury, New Red conglomerate and section, 



51, 53 (PI. 29. f. 1.), 713. 

 Hagley, Worcestershire, calcareous conglomerates of New Red 



System, 47, 132. 



, Lower New Red Sandstone, 60. 



, coal seams near to, 56, 57, 506. 



, plants of Lower New Red Sandstone, 63. 



, Park, sketch from, 78. 



, trap rocks near, 496. 



Haglow Court, Gloucestershire, 446. 

 Hailstone, near Rowley, trap-rock, 497. 

 Haie's End, Malverns, Ludlow Rock, 411. 



, fossil shells at, 610 et seq. 



Hale's Owen, Lower New Red Sandstone near to, 47, 55, 63. 



, coal measures at, 56, 57, 465, 467, 472. 



, trap tufs in coal measures and Lower New Red 



Sandstone, 77, 134, 468, 496, 505, 507. 

 Halifax, lower coal strata near, 89. 

 Halkin, Flintshire, siliceous grits of, 144. 

 Hall in the Forest, Salop, outlier of Old Red Sandstone, 191. 

 Hall, Capt. Basil, R.N., drift wood of Mississippi, 149. 



, Sir James, Bart., experiments on rocks, 73, 498. 



, on the action of water, 537. 



Halmore Green, Tortworth, 456. 



Hamilton, Mr. W. I., on Silurian Rocks in Turkey, 7. 



, on volcanic rocks of Asia Minor, 70. 



■ , tour with the author, 56, 296. 



. , on a raised bench in Fife, 546. 



Hampshire, tertiary deposits referred to, 521. 



Hampton, Pembrokeshire, carboniferous limestone of, 380. 



Hanter Hill, Radnorshire, view of, 311, 318, 319. 



. , section across (PI. 33. f. 4.), 718. 



Hanway Common, Salop, 203. 



Harcourt, Rev. William Vernon, on chemical changes produced 



in rocks by heat, 228. 

 , Capt. Octavius Vernon, R.N., icefloes in the Pacific 



(sketch), 541. 

 Harley's Wood, outlier of Old Red Sandstone, 192. 

 Harmer Hill, Salop, New Red Sandstone, 41. 

 Haroldstone Issels, Pembrokeshire, carboniferous limestone, 



&c, 380. 



Harolclstone's Nose, Pembrokeshire, (PL 35. f. 7.) 721. 

 Harpton Court, Radnorshire, 319. 



Hartlebury, Worcestershire, New Red Sandstone of, 42. 



Hartshorne, Rev. II. O, Salopia Antiqua, xxxii. 731. 



Hastings, Dr., on the saliferous district of Worcestershire, 31. 



Hatch Bank, Clee Hills, carboniferous limestone, 106. 



Hatchett, Mr., on the origin of coal, 149. 



Hoten, Pembrokeshire, Caradoc Sandstone, 395. 



Haughmond Hill, near Shrewsbury, Cambrian and trap rocks, 

 92, 93, 232, 256, 264. 



— , dislocations and vein with bitumen (wood- 

 cut), 265, 728. 



, direction of, compared, 267. 



— , debris of the northern drift arrested on, 529, 



535. 



Haugh Wood, dome of Caradoc Sandstone in Woolhope Valley, 



429, 432 (PI. 36. f. 9.), 724. 

 Haverfordwest, Carboniferous and SilurianRocks, 372, 381, 395, 

 398 (PI. 35. f. 1.), 721, 



