Fig. 1.—Section of the Bar of the Mississippi. ‘ 
Gulf of 262 feet South-west Bar, 15 feet deep, 
Mexico. deep. 95 miles from New Orleans. Point Balize, 

pag ea Ne SE SIR OSS SARIN ern ener A a) a ne RCN neo aonemamesests wero Sw 
== —— = 













——— ee 
9 ss — ———SSS——SS=—_—OSSS 
SS ee —— ee 
a. ee = —_ SSS SS 
‘4. Sa SSS Ss 
= SSS aS 
5 = _———————— nn one 
= = --. vaw S Poe - 
= aes oe nye . $ Vee, CS 
a ee ts 8 . 7 a! be = ey ee oO ee eS ee ~ 
eR TAR AS Eee ah haa Rea ee ere = 
a sy ve wy ge) e eae att Pair. 
a Gate ve eae let eo, i fee ge tip as to Sees Peat Piys ra) ice we One ar) 
° “ 


The Bar. 
Jrom top to bottom of a thick 
existing Physical Causes during stated Periods of Time. 23 
osit 1s not an absolute proof (as has been supposed*) that 
lusea inhabiting the locality, and therefore the discovery of the 
same species of organic remains 
dep 
Fig. 2—Theoretical Diagram of four successive Bars, with the 
section of the junction of a ser 
the land or elevation of the sea-level. 
r ei ¢ b 
a, b, c, d, 1st, 2nd, 3d, and 4th Bars of marine forma 
The marine stratum a is 
- with 4. 

ir accompanying fluviatile 
fo 
d, 3d, and 4th fluviatile deposits. 

This holds good w 
hether the land has subsided or the sea-lev. 
1; 6 with 2; ¢ with 8; andd 
, 
el risen. 
rmed during eit 
running per hour from 2 to 2545 miles, and passing over the 
sous showing a 
er subsidence 
Finvia- 
tile form- 
ations. 
hi 
700 feet of 
thai 
feet must have be 
28 
Z 
. 
“Fe 
re. #257 
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Ais 24 
Hla 
sa gtebgitt et 
ed es Sge SEs 
eice283 ehaeh 
Pian Ge 
b ESEsse ga. 
S83 9°2 : 2e28 
soreiasdalcge 
ay egstede 
eo 
Ee sidaies 
oy es a 
Pee es 
clear 
of the 
