GICAL STRATA, 



IE 



CTERS OP THE VARIOUS STRATIFIED ROCKS; 



3E LOCALITIES WHERE THEY ARE FOUND. 



TERS, THICKNESS, AND LOCALITIES WHERE FOUND. 



jrged Forests. [Cavern Deposits, Mammalian beds, and the Boulder or Drift Clay. 



ed Clay and Loam. 4 to 12 feet. Thorp near Norwich; Bridlington, Yorkshire. 



7 Shells, and locally layers of Phosphatic Nodules. 30 feet. Near Ipswich, Sutton, Ramsholt. 



arals, sometimes compact, forming thin beds of Limestone. 20 feet. Orford, Ramsholt. 



? to this epoch? (The shell beds of Touraine and Bordeaux in France.) 



laceous Marls, Limestones, greenish Marls, &c. 400 feet. Headon Hill, Binstead, Shalcombe. 



; grains, septaria and iron Sand. 250 feet. Barton Cliffs, Hampshire. 



layers of flint Pebbles, and coloured Clays and Sands. 540 feet. Bagshot Heath, Bracklesham. 



-een, and other coloured Sands, nodules of Septaria. 520 feet. London, Isle of Sheppey, Bognor. 



&c., and layers of coloured Sands and Pebbles. 100 ft. Heading, Blackheath, Woolwich, Alum Bay. 

 beds and nodules of Flints. 300 feet. Northfteet, Purfteet, Brighton, Danes Dyke, Yorkshire. 

 our, with few or no Flints. 350 feet. Near Cambridge, Flamborough Head, Dover Cliffs. 

 t. Dover; Wiltshire; near Cambridge; Surrey and Sussex. 



i, sometimes compact, and with layers and nodules of Chert. 120 feet. Merstham, Isle of Wight, Sfc. 

 times soft, with green grains disseminated in it. 50 to 100 feet. Folkstone, Cambridge. 

 rs of Chert and local beds of Limestone and Fullers' Earth. 250 feet. Near Maidstone; Hythe,8fc. 

 [ beds of shelly Limestone called Petworth Marble, and Ironstone. 150 feet. Weald of Sussex, Sfc 

 ible Sandstones. Tilgate Stone, a compact grey grit. 500 feet. Hastings, Tunbridge Wells, 8fc. 

 ihwuter Limestones and Marbles. 150 feet. Swanage Bay, Warbarrow Bay, Sfc. Dorsetshire. 

 { or compact, with layers of Chert, and subordinate beds of Sand. 150 feet. Isle of Portland. 

 Shale, Selenite and Septaria. 400 feet. Kimmeridge and Encombe Bays, Dorsetshire. 

 stone. 20 to 60 feet. Scarborough, Yorkshire ; near Oxford. 



some places entirely composed of Coral. 30 feet. Farringdon, Calne, Malton, Pickering, Scarboro. 

 stones. 20 to 50 feet. Scarborough, Malton, Yorkshire, and Wiltshire. 



i, containing Septaria and Selenite. 400 feet. Oxford, Chippenham, Scarborough, Weymouth. 

 very variable in quality and colour. 30 feet. Kelloway Bridge, near Chippenham, Scarborough, 8fc. 

 r ith layers of Clay and calcareous Sandstone. 10 feet. Malmsbury, Chippenham, Yorkshire, Sfc. 

 rations of fissile Limestone, and layers of blue Clay. 30 feet. Corsham, Cirencester, Sfc. 

 y with thin beds of brown Limestone. 10 to 20 feet. Bradford, Wilts; Tetbury, Cirencester, Sfc 

 y shelly, the rest sometimes sandy, and often thick bedded. 120 feet. Bradford Hill, near Bath, 



Stoncsfield, Oxfordshire; Sevenhampton Common, Gloucestershire. 



bstance called Fullers' Earth. 30 to 100 feet. Old-down Hill, near Bath; Box; near Stroud. 

 f ferruginous Sand, with concretions of sandy Limestones and Shells, 250 feet. Cotteswold Hills. [ 

 , sandy Limestone and Shale. 50 to 200 feet. Whitby; Barrow-on- soar, Leicestershire; Lyme Regis.] 

 s of Ironstone. 30 to 150 feet. Staithes, Yorkshire; Dumbleton Hill, near Cheltenham, fyc. 

 i layers of nodules of argillaceous Limestone. ^ C Dumbleton; Batiledown, nr. CJieltenham.l 



Limestone, with partings of Clay or Shale. > 60 to 400 ft. < Barrow-on-soar, Lyme Regis. 

 grey Limestone, and the bone bed of Bristol. ) C Lyme Regis, Bath, Bristol. 



.dstone and Shales, with veins of Gypsum and Rock Salt. Warwickshire, Cheshire, Derbyshire. 

 r aterstone, form a middle group in Cheshire. 400 feet.) 



md often impregnated with Salt. Red Conglomerate. 600 feet. Cheshire, Lancashire, Sfc. 

 fine grained and thin bedded. 40 feet. Knottingtey and Donca&ter, Yorkshire. 

 rypsum. 50 feet. Mansfield, Nottinghamshire; Manchester 

 in Limestone, thick bedded. 300 feet. Derbyshire, Yorkshire, Ferry Hill, Sfc. 

 Alliaceous or sandy nature. 60 feet. Durham. 



inglomeritic, loose Sands,variegated Marls, grey micaceous Sandstone, &c. Shropshire, 8fc. 

 nicaceous Sandstone, Ironstone, and occasionally Limestone. 3000 feet. Northern Counties, fyc. 

 hales, Ironstones, thin Limestones, and sometimes beds of Coal. 600 feet. Northumberlandffyc. 

 L In some parts beds of Marble, veins of Lead and Calamine. 2400 feet. Derbyshire ; Bristol. 

 sometimes bituminous. 1000 feet. Lanarkshire, Linlithgowshire, Sfc. 

 nwards into a dark reddish-brown coarse grained Sandstone. Symonds Yat, Monmouthshire. ^ 5000 

 stone, and concretionary impure Limestone. Near Hay and Abergavenny. > to 

 Istones, and beds of reddish Shale. Between Ludlow and Downton Castle; Caithness, Sfc. ) 8000ft. 

 lies, and grey argillaceous and somewhat crystalline Limestone. 2000 feet. Ludlow, 8fc. 

 nd dark argillaceous Shale, with nodules of earthy Limestone. 1800 feet. Wenlock, Dudley, Sfc. 

 zose grits, conglomerates and Freestones. 2400 feet. May Hill, Gloucestershire; Coniston, fyc. 

 rtdth conglomerates, Sandstone Shale, and Schist. 1200 feet. Builth, Bala, #c. 

 rstratified trappean rock. 20,000 feet. Snowdon, Cader Idris; Cumberland, Sfc. 

 given in round numbers, subject however to considerable variation in different localities. 



1 REYNOLDS. 174, STRAND. 



