762 



INDEX. 



Sedgwick, Rev. Professor, on plants of coal measures, 85. 



— — , on the coal-field of Flintshire, 141. 



— — — — , carboniferous rocks of the North of 



England, 160, 502. 

 — , on cleavage joints and bedding of 



slate, 244, 246, 309, 354, 357, 360, 362, 401. 

 , on Cambrian Rocks-, 4, 5, 8, 255, 308, 



310, 317. 



■ , on the Silurian tract between the 



Ffyrnwy and the Berwyns, 306 et seq. 



— — ■ , contributions to map of North Pem- 



"broke, 399, 407. 

 ■ , on Charnwood Forest and Nuneaton 



coal-fields, 569, 729. 



, on slaty cleavage, 307, 354, 401, 574. 



and Mr. Murchison, on the Keuper at 



Stuttgard, 29. 



, on rock salt, 32. 



, on the Styrian 



Alps, 150, 545. 



, on the culm of 



Devonshire, 374. 

 , onraised beaches 



in Devonshire, 59, 546, 565. 

 , on fishes of the 



Old Red Sandstone, 182, 588—601. 

 Sedimentary deposits, origin of, 573. 



Seefeld Alps, bowlders found in high parts of (wood-cut), 544. 

 Serpentine and trap rocks, 320, 458. 

 Severn, valley of, in Lias, 16, 19. 



, in New Red Sandstone and marl, 29, 417. 



, in Lower New Red Sandstone, 57, 59, 61, 62. 



, in Coal Measures, 100, 211, 249. 



, in Silurian Rocks (PL 32. f. 1.), 211, 301, 717. 



, rises in Cambrian Rocks, 511. 



, view of anticlinal at Purton Passage, 446. 



, tract circumscribed by exempted from foreign drift, 511. 



, course or direction of, 521. 



, banks of (near Shrewsbury), marine shells in gravel, 



532. 



, estuary of, 546, 550, 558, granite pebbles traceable 



into, 536. 



, valley of, ancient fluviatile deposits extending into, 



555, 556, 557. 



, turbid sediment of, 562. 



, former condition of the region of the, 564. 



Shaft sections of the Staffordshire coal-fields, 476. 

 Sharpstone Hills, Shrewsbury, trap dykes in Cambrian Rocks, 



258, 264. 



Shatterford, near Kidderminster, coal measures and trap, 58, 

 134, 137, 138, 508. 



, section at (PI. 30. f. 3.), 715. 



Shelderton Hill, Ludlow, 203, 205. 



— , fossils at, 617 et seq. 



Shells, fossil. See Molluscks. 



, marine, of existing species in Northern Drift, 530. 



, freshwater, in ancient alluvium, 555. 



, in modern lacustrine marl, 564. 



marl, formation of, 564. 



Shelton Rough, Shrewsbury, gravel and sea shells, 526, 532. 

 Shelve, Salop, Lower Silurian and trap rocks, 267, 280, 302, 

 730. 



- , volcanic grits of, 268. 



Shelve, Salop, mining ground of, 277. 



■ — ■ — , section across (PI. 32. f. 1, 2, 



3.), 717. 



, parallel lines of igneous action. See Corndon 



Hills, 286. 



or Corndon, direction of the strata, N.N.E. S.S.W., 



568. 



, fossil shells in district, 638 et seq. 



Sheriff Hales, Salop, New Red Sandstone, 62. 

 Shobden Hill, Herefordshire, Ludlow Rocks, 203, 311. 

 Sholeshook, Pembrokeshire, Llandeilo flags, 397. 

 Shifnal, Salop, New Red Sandstone, 41, 62. 

 Ship Inn, Gloucestershire, lower limestone shale, 453. 

 Shirlot, Salop, coal, 100, 101, 103. 



Shrewsbury, Silurian and Cambrian Rocks, north-eastern ends 

 of the, 28. 



Shrewsbury coal-fields, relations of to the Lower New Red Sand- 

 stone, 60, 61, 62. 

 , view near, 81. 



, coal-field of, with freshwater limestone and or- 

 ganic remains, 79, 80—98, 101, 148. 



, faults of, 99, 100, 294. 



■ plain, course of the Severn, and detritus, 511, 521. 



, gravel and shells near (wood-cut), 526, 532. 



, country about, when submarine, 529. 



, sections near (PI. 29 et seq.), 713 et seq. 



Shropshire, north, great outlier of has, 13, -22. 



, New Red System, 36, 41, 64. 



, cornstones of New Red System, 60. 



, western part of, stratified volcanic grit alternates 



with Lower Silurian Rocks, 77. 



, Coal-Fields, 81—140, 160, 507. 



, or Salopian Coal-Fields, probable origin of, 148. 



, Old Red System, marl, cornstone, flagstone, &c, 170, 



175, 177. 



■ , Silurian deposits, best types of in, 196 et seq. 



■ , Silurian strata extend from, to Pembrokeshire, 406. 



1 , local detritus, 524. 



, north of, when last submerged, 524. 



, tracts of, covered by northern drift and granite 



bowlders, 528, 533. 



, marine shells of existing species in gravel, 532, 533. 



, bowlders in, 540, 544. 



, mineral axis of, 224 et seq., 255, 266, 287, 568. 



, line of fissure extending through New Red Sand- 

 stone from the Breidden Hills, 294 et seq., 570. 



, Silurian strata unconformable to Cambrian, 573. 



, fishes in Old Red Sandstone of, 587, 596. 



, Silurian organic remains of, 605 et seq. 



Shucknell Hill, Herefordshire, Ludlow Rocks and Walker's 

 soap, 186, 435. 



Sibdon Hill, Salop, trap dykes, 229. 



Sicily, volcanic eruptions on coast of, 70. 



Siefton, Salop, Ludlow Rocks, 202. 



Silesia, coal-fields and Old Red Sandstone, 170. 



Siluria, ancient region of, defined, xxxi. 



, name why applied geologically, v. 6, 7, etseq., 195, 196. 



, local drifts within the region of, 509 et seq., 522, 523. 



, ancient elevation of, 524. 



, surface of free from northern drift, 529. 



, bones of quadrupeds of extinct species in, 552, 553, 



554. 



, ancient hydrography of, 564. 



