TABLE OF GEOLOGICAL HISTORY. 4Y 
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-ft 
fl 
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ft 
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Gulf, and Paci 
ocks, saline, sili 
ignite. 
s s 
1 
'bco, » 
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O oS 
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qj 
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ft ft ^ 
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ft 
a 
1. 
11 
ti 
s 
§s 
ft ol 
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O a 
—Niagara, Clinto 
-Medina. 
N 
cO 
ft 
O 
a" 
q 
a 
03 
cc 
a 
o 
^ g 
rocks, such 
nd iron beds. 
and sea deposil 
i 
s 
a 
3 
< 
3 
73 
0) 
a 
'3 
o 
Atlantic, 
areas. R' 
ous, and 1 
Limestone, 
ates. At: 
Connectic 
Shale, CO 
limestone 
03^^ 
o „ 
ft 0 
cq cc 
CTj 
Chemung. 
Hamilton, 
Corniferou 
Limestone- 
Sandstone- 
u 
H 
of 
a 
"3 
O 
03 
II 
|i 
i Crystalline 
granites a 
1 
.’3 
ft 
iSO S 
’C 
ft 
3 
w 
a 
S 
T3 S 
•s ot 
c/3 
ft 
o 
2 
0)^3 
ft D.s 
3 
O 
Hccfe 
2 
s 
a 
cO 
w 
Post-Glacial 
Glacial. 
Pliocene. 
Miocene. 
Eocene. 
Cretaceous. 
Jurassic. 
Triassic. 
Coal measure 
4-1 
'S 
o 
ft 
3 
o 
ft 
a 
ao 
Shales. 
Sandstone. 
Limestone. 
Upper Silurie 
a 
m 
a 
03 
& 
o 
ft 
Cambrian. 
Huroniau/—A 
Laurentian. 
Ages. 
Recent. 
1 
Qua¬ 
terna¬ 
ry. 
Ter- 
tiary. 
<v a u 
02 o =3 
1 
Car¬ 
bonif¬ 
erous 
Devo¬ 
nian. 
Silu¬ 
rian. 
f § 
3 
m 
< 
o . 
isi 
® d 
co.S 
C 
o6.? 
o 
o 
W 
S o 
O N 
<D o 
CUft o 
W-H 1,^ 
N 
<1 
C/3 
§ 
3 M 
3 
ft?’ 
o 
03 
C/3 
OJ 
Invertebrates. 
o. 
S 2 
WX3 
*tl be 
Animals. 
Mastodon, cave-bear, tiger, 
non, eiK, rninoceros, arma¬ 
dillo, butterflies. 
Primitive horses, whales, 
wolves, hoofed animals, 
monkeys, cats. 
First mammals, dinosaurs, 1 
and other great lizards, 
archaeopteryx, pterodactyl, 
crocodiles, sponges, turtles. 
Amphibians, spiders, cock¬ 
roaches, land shells, fusi- 
lina, new brachiopod. 
Ganoid fishes, goniatites, 
lamellibranchs, blastoid 
crinoids, discina. 
Insects, nautiloids, orthocer- 
atites, spirifers, crusta¬ 
ceans, brachiopods, corals, 
sea-urchins. 
Fishes, insects, (?) mollusks, 
crustaceans, crinoids. coral. 
Trilobite, linsrula, brachio¬ 
pod, graptolites. 
rrt' 
c 
- 
C/3 
n 
03ft 
c/3 
ft ft 
o; 
a 
Plants. 
Modern plants 
trees, an 
flowers. 
Magnolia, fig; 
cypress, pain 
Sigillaria, lep 
dodendrons, 
calamites, 
equiseta, tre 
ferns, and ot 
er coal-plant 
Ferns, se 
weeds. 
Few Ian 
plants, lie 
ens, algse. 
Small mari: 
plants. (?) 
