SYNOPTICAL TABLE OF BRniSII 
CLASSES. 
SYSTEMS. i 
FORMATIONS.— Maeine Types. 
SECOIifDARY. 
— Mesozoic of Fhillips (continued). 
JURASSIC. 
"\^'eU developed in the Jura , 
Mountains. 
Portland (Dorsetshire) Oolite. Somerset Teleomurus Upper Lias. 
Oxford Clay. 
LIASSIC. 
From Lias, the name of 
certain roc-ks, usually in 
l(j'i'€fs the latter "word 
being sounded by the 
quarrynien like lias. 
Yorkshire Alum- Shales. V 
["Liassic Rocks occur in Londonderry f 
Gloucestershire Marl-Stone. < (Magillican, Portrush) and Antrim ) 
Lincolnshire and Somersetshire Lias. 
TRTASSTC. 
From apparently consisting 
of three m.embers (Keu- 
per, Muschelkalk, and 
Bunter) in Germany. 
Cheshire Marls, with Salt. Cari-ickfergus ditto. Gioucestershire and London- ! 
derry (Lisnagrib) Acicula coutorta beds. 
(Not known in Britain.) German Muschelkalk. j 
Lancashire Red and Mottled Sandstone, (Probably much of it freshwater.) 
? St. Cassian (Tyrol) and Hallstatt (S.E. Salsburg) Limestones. 
.i 
< % 
1 
PE RMT A 'S—MurcMson . 
From Perm, a country in 
Russia, where a well-de- 
veloped series of the Sys- 
tem occurs. 
Sunderland and Hartlepool (Durham) Crystalline and Oolitic Limestones. 
Brothertou (YorksLire) beds. Andtrea (Tyrone) and Cultra (Down) Mag- 
nesian Limestone. German " oberer Zechsteiu." Manchester Marls. 
Humbleton and Tunstall (Durhain) " fossiliferous Limestone." Doncaster i 
and Pontefract (Yorkshire) Limestone. German "mittler Zechstein." j 
Midderidge (Durham) Marl-slate and compact Limestone. German Kupfer- 
scliicfcr Slid untGrcr ZcclistGin " 
Gera (Thuringia) Ehyneopora Geinitziana WeissHegende. ? Ferry Hill (Dur- 
ham) Lingida Sandstone. 
CARROXTFEROUS. 
Characterized by deposits of 
Coal or Carbon. 
(Not known in British Isles.) ? Artinsk (Russia) Grits. 
Redesdale (Northumberland) and Lisdoonvarna (Clare) Shales. Gal- 
Yoredale (Yorkshire) Limestone. way ("Upper") Limestone. 
• • • : 
Bristol Limestone. Cork (" Lower") Limestone. 
Tweedian beds {Tate). Bantry Bay (Cork) Calcareous Schists. 
deyoxia:^- 
— Sedgwick and MurcMson. 
Individuality of the System 
first made out in Decon- 
shire. 
Petherwin Slates. South of Ireland Old Red Conglomerate. Fifeshire 
Sandstones. 
Marwood Sandstones. Coomhcla (Cork) Grits. 
Plymouth Limestone. Dingle (Kerry) beds. Caithness Schists. 
Linton Sandstones. Glengariff Grits. Herefordshire Cornstones. 
SILmiAy—^Iiirchison. 
Type rocks occur in a por- 
tion of Wales, anciently 
inhabited by a tribe called 
Silures. 
Ludlow Shales, etc. Doonquin (Kerry) beds. 
Wenlock Limestones.. Ferriter's Cove (Kerry) Shales. 
Llandovery Grits (May Hili Group). Kilbride (Connemara) beds. 
Caradoc Sandstone. Portrane (Dublin), ? Pomeroy (Tyrone), Chair of Kildare. 
Llandeilo Flags. Newtown Head, near Watcrford. i 
CA^lBRlA^—SeJguick. 
Type rocks occur in Cfnn- 
bria (Wales). (Huro- 
nian, Loc/an ; Primordial 
zone, Barrande ; Taconic, 
Emmo}is.) 
Tremadoc (Caernarvonshire) Lingula Flogs. Shropshire " Stiperstones." 
Longmyr.d (Shropshire) Rocks. Bray Head (Wicklcw) Flags. Ross-shire 
Congionierate and Sandstone. 
(This System probably contains more Formations. The Longmj'jid 
Rocks are estimated at 26,000 feet in thickness !) 
L AU R E N T I AN Loga n 
Forming the Laurentide 
monntains of Canada. 
(Lovdsian, Murchison.) 
"Fundamental Gneiss" of the Island of Le^Ti3 and north western Highlands ' 
of Scotland. Estimated at 40,000 feet in thickness in Canada ! 
: 
Third Edition. 
