178 
EEPORT OF THE AMERICAN COMMITTEE. 
00 
P3 
W 
Q 
O 
< 
o 
I— I 
C5 
O 
1-1 
o 
o 
p^ 
o 
w 
Eh 
■A 
O 
H 
a p 
« w 
O M 
^ S 
H 
Oi 
d 
Serpentine, etc. 
Melaphyres, etc. 
Basalt dolerites, 
etc. 
Basic lavas. 
d 
'3 
Granite, syenite, 
etc. 
Porphyres. 
Trachytes, phono- 
lites, etc. 
Acidic lavas. 
> 
S si H 
p a X 
H 5 ^ 
d 
Each National Committee should be 
invited to fill in the.se columns witJi the 
names and particulars, paUeontological, 
petrograpbical or topographical of the 
subdivisions or beds or of each single 
stratum as they occur (if they do occur 
in their respective countries), dividing 
if possible each division into three sub- 
divisions. 
> 
o . 
w 
d 
SO - 
;< 
> 
.a 
(■ Laurentian. 
< Huronian. 
( Taconian. 
1 Cambrian. 
A Ordoviciau. 
(Silurian. 
( Rhenau. 
\ Eifelian. 
( Famenian. 
iBernician. 
Coal measures. 
Permian. 
Vosgian. 
Conchylian. 
Rhaetian. 
Liasian. 
Corallian. 
Bathonian. 
i Wealdian. 
< Cenomanian. 
(Turonian. 
( Eoeenian. 
< Miocenian. 
(Pleiocenian. 
f Pleistocenian, 
1. Diluvian. 
Lossian. 
V-H 
'd 
o 
1 
Archeic. 
Siluric. 
Devonic. 
. Carbonic. 
Triassic. 
Jurassic. 
Cretacic. 
Henocenic. 
Prehistoric. 
Historic. 
V s 1 
HH 
p 
o 
o 
? 
Azoic or Eozoic. 
Palaeozoic. 
Mesozoic. 
Cenozoic. 
Modern. 
M 
s 
d 
s 
Primitive. 
Primary. 
Secondary. 
Tertiary. 
Quaternary. 
