A TABLE SHOWING THE PROBABLE FOREIGN EQUIVALENTS OF THE SILURIAN AND CAMBRIAN ROOKS. 
TAIH. FR&.NCE. „ SPAIN & PORTUOAt, BOHEMIA, 
Upper Ludlow 1 
Bhalo^. Aymeatry 
liicslone, Lower > 
Ludlow sUalc- 
(Kcmlnl group)-] 
VV.-nloc)t lime-1 
it.-.in"', Wenloek 
Wiiolhope 
1 iiino, {Don. [ 
Lower Llnndo- 
vory Mudslonc, , 
Caradoc satid- 
Btono ond BnU 
(Conialon group) 
Llandoilo rocks 
Linguln flogs, 
Postiniog, Are- 
nig, nnd Trcmn- 
doc slutes. iSiiprr 
oi)nglomci*atc3, and 
ferruginous eaud- 
stonesorLa Sartbc. 
Bluish acUisls of 
Angers. 
Conglomerates, 
nnd sandstones of 
Brittany. 
Lnnginynd nnd l 
Bangor rooks, „f 
Llanberris slates BriitanJ-. 
and Harlcolt 
Light l>]ue 
slmlc and argil- 
laceous schists, 
with tardiola and 
gTiiptoliits. Serra ] 
do Bussuco, Por- 
tugal, j 
aiiiJ v. ; iippcrnnd 
I lower limestones 
1 anil schists. 
r Pish-bedaand lime- 
stone. Ociel and 
Eslhonia. 
LimcstoDP with ixraU 
Ochrcoua ar- " 
gillaceous rooks, 
with oTihis, &c„ 
near Bussaco, 
Portugal. 
Black schists, 
with card iota, 
Sierra Morona 
and South Py. 
Quartxites.mtca 
sandstones, car- 
bonaceous schists 
and limestones, 
Serra de Unssaco, 
Portugal. 
Schists, lime- 
fitones, and 
(juartzitcs of the 
Siei 
Moi 
de;" stage D ; Limcstouc with (v>ra/*i 
quartzitcs. 
Ja.od8t»=M or a,„,.,.. / C;l 
Unfossiliforoua ] 
argillaceous 
eohUts, with [ 
Gneiss & Granite. Onoiss & Granite 
Shaly & Sandy rooks. 
Calcareous tings. 
Norway 
( (Upper Mnlmo group) 
Malmo limestone, 
Graptolite schists, 
I Orthocoratite liinc- 
(Rcgio E Cn/ploni/- 
moritm : limestones 
with sandstones and 
shales (Angelin). 
f (Lower Malmo group) 
UpperEncrinalschiata 
Coralline limestone, 
Pentamprus limc- 
D B. Il-irparum : 
Schists, limestones, 
Tfitli m[iTU( Angelin). 
(Oscarakal group) 
I Cnlonrccus sandstones 
I Cidcareous & argilln- 
? flagstones. 
tirnptolito & Alum 
schists, (Lower Oslo 
gioup). 
Kcgiones U .A .• Co- 
riiicorypluiriim and 
Olfnomin. 
Aluminiferous 
schists A Mack lime- 
stones. (Angolin). 
e Quartii;e & Schists. 
1 Rcgio Fufoiiiariiin. 
Upper Pentamerus 
limestone, Deltliyris 
shaly limestone. 
Lower Pentamerus 
Watorlime rooks, 
Onondaga salt rocks, ] 
Coralline limestone. 
Niagara shales anil 
Clintoa rocks Surgcnt. 
Levant. 
r Hudson River group. 
Utica slate 
Trenton limestone 
Black River liraestono ■> 
Bird's Eye limestone I 
Chnzy limestone | 
C.ilciforous sandstone 
Ni>TB.— In Tburingiii II 
Gneias. ... Laurentian (Logan). 
vcrlnid bjr eKjnrncke, «in<litonai, and ilaW, irlUi lubordloste bad< of IluMtono and alntnlnircn 
