SYNOPTICAL TABLE OF BRITISI; 



CLASSES. 



SYSTEMS. 



FORMATIONS.— Maeine Types. 



SECONDARY. 



—Mesozoic of PhxlUi>t (oontinucil). 1 



JURASSIC. 

 Well developed in the Jura 

 Mountains. 



Portland (Dorsetshire) Oolite. Somerset Teleosaurus Upper Lias. 

 Oxford Clay. 



Bath Oolite. ? Lame (Antrim) mixed Fossil Bed: 



LIASSIC. 

 From Lias, the name of 

 certain rocks, usually in 

 layers, the latter word 

 being sounded by the 

 quarrynien like lias. 



Yorkshire Alum-Shales. 



Gloucestershire Marl-Stone. < (Magillican, Portrush) and Antrin: 

 Lincolnshire and Somersetshire Lias. 



TRIASSIC. 

 From apparently consisting 

 of three members (Keu- 

 per, Muschelkalk, and 

 Bunter) in Germany. 



Cheshire Marls, with Salt. Carrickfergus ditto. Gloucestershire and London 

 derry (Lisnagrib) Avicula contorta beda. 



(Not known in Britain.) German Muschelkalk 



Lancashire Red and Mottled Sandstone. (Probably much of it freshwater.) 



? St. Cassian (Tyrol) and Hallstatt (S.E. Salsburg) Limestones. 



PRIMARY. 



— Pal:]eozoic of Sedgwick. 



From Ferm, a country in 

 Russia, where a well-de- 

 veloped series of the Sys- 

 tem occurs. 



Sunderland and Hartlepool (Durham) Crystalline and Oolitic Limestones 

 Brotherton (Yorkshire) beds. Andtrea (Tyrone) and Cultra (Down) Mag 

 nesian Limestone. German " oberer Zechstein." Manchester Marls. 



Humbleton and Tunstall (Durham) " fossiliferous Limestone." Doncaste 

 and Pontefraet (Yorkshire) Limestone. German " mittler Zecbstein." 



Midderidge (Durham) Marl-slate and compact Limestone. German Kupfer 

 schiefer and " unterer Zechstein." i 



Gera (Thuringia) J?7(y«eojjc/?-a ffemi^zic?ia Weiss'liegende. ? Ferry HiU (Duii 

 ham) Linyula Sandstone. | 



C AKl3\J>.> Ir X/KU U S. 

 Characterized by deposits of 

 Coal or Carbon. 



(Not known m British Isles.) ? Artinsk (Russia) Gritpl 



Redesdale (Northumberland) and Lisdoonvarna (Clare) Shales. GaJlj 

 Yoredale (Yorkshii-e) Limestone. way (" L^pper") Limestone. L.j 



Bristol Limestone. Cork (" Lower") Limestonq* = 



Tweedian beds {Tate). Bantry Bay (Cork) Calcareous Schist; j 



DEVONIAN 

 — Seiffjirick and Murchinon. 

 Imlividiiality of the System 



first mi\de out in Decon- 



»hire. 



Pether win Slates. South of Ireland Old Red Conglomerate. Fifeshitt ijti 

 Sandstones. j 



Marwood Sandstones. Coomhola (Cork) Grith 



Plymouth Limestone. Dingle (Kerry) beds. Caithness Sebist * 



Linton Sandstones. GlengarilF Grits. Herefordshire Cornstone^ 



SI LU RI AN— 3/Hrc» i^on. 

 Type rooks occur in a por- 

 tion of Wales, anciently 

 inhabited by a tribe called 

 Siluref. 



Ludlow Shales, etc. Doonquin (Kerry) bedS 

 Wenlock Limestones. Ferriter's Cove (Kerry) ShaleM i 

 Llandovery Grits (May Hill Group). .? Kilbride (Connemara) bedBi 

 Caradoc Sandstone. Portraue (Dublin), ? Pomeroy (Tyrone), Chair of Kildarjp 

 Llandeilo Flags. Newtown Head, near Wat^-rforl 



C.\Umil\^-S,'dff,rick. 

 Type i-ocks occur in Cnm- 

 briit (Wales). (Huro- 

 iiian, Lo(]iin ; Primordial 

 7.one, Barrande; Taeonic, 

 £i)i}nons.) 



t Trenuvdoc (Caernarvonshire) Lingula Flags. Shropshire " Stiperstones." \ 



1 Longniyr.d (Shropshire) Rocks. Bray Head (Wicklow) Flags. Ross-shi' 

 Conglomerate and Sandstone. 



(This System probably contains more Formations. The Longmj^nd ^ 

 Rocks are es'timatod ar 2(),(iO(l feet in thickness !) " 1 



LAURKNTlA.N-Xo^«,,. 

 Forming the Ixinroitidr 

 uiount.nins of Canada. 

 (Lewisian, Mwrhiso}/ .) 



"Fundamental Gneiss" of the Island of Lewis and north-western Highlanj : 

 of Scotland. Estimated at 40,000 feet in thickness in Canada ! | 



Third EditioJ 



