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by E. Cornelius. me 221 
the limestone of this division from that already described, is 
this, v5 srRATA ARE HORIZONTAL. Frequently immense piles may 
be seen forming bold precipices, but always in horizontal layers, 
differing in thickness, from a few inches to many feet. How far 
this arrangement extends to the west and north, I have not yet 
been able to learn. Travellers always speak of the limestone 
tocks in West Tennessee and Kentucky as flat, from which cir- 
cumstance I conclude that the Cumberland mountain forms for a 
considerable distance at least, the eastern boundary. I have ob- 
served but three other particulars in which the strata — the Ho- 
rizontal differ from those of the inclined limestone. 
~T. Its color is not so strongly marked with the bluish tinge. © 
2 Itis not so commonly penetrated with white veins of a 
semicrystallized carbonate of lime; peed — qt 7 asso- 
ciated with the uneven fractured species. — . 
3. Petrifactions are oftener found in it. ” 
~Twillhere take the liberty to suggest, whether in our maps 
of geology, some notice should not be taken of this very import- 
ant division in the limestone country. Such a division exists in 
feet; nature has made it; and if geology depends on nature for 
its only legitimate inductions, there can be no reason why a fea- 
ture re $0 prominent as this, should be overlooked. T shall not un- 
dertake to account for their difference; but would not” every 
Seological theorist consider them as distinct isin 
eo ae 
Cumberland eine eee sed gh 
7 _ The Cumberland mountain, which forms a part of this di- 
viding line, is itself a singular formation. It belongs to ihe 
class cal alied “Table mountains.” Its width varies from a few 
"The modesty of the writer has prevented him from Meicthone to the forma- 
tions Which he has well describe d, the terms j, which 
ure canbe little doubt doin fact belong to them. His vatican 
> €ppear to belong to the transition class of Werner, and his fiat 
tao secondary. It may be observed in this setae a tes the specimens 
rl, yi the text (pas sim,) appear to be correctly described by Mr. Cor- 
to j his geological inferences as far as co eee seen 
ata roa from — native beds, can form a safe basis for genera t 
inductions. — dito; 
ui 
