Notice and Review of the Reli uiae Dilwevanae. 338 
in the following extract, a description 1 off series of vallies 
of denudation. 
“a From Pittsburgh to Cincinnati, the ee from the 
. at as to extent, direction, &c. seems to be determined 
“by the number direction and magnitude of the streams 
which traverse them. They are the remains of what was 
formerly a continuous, and nearly horizontal stratum, with 
a large deposite of fopeirincteiailent soil, which the flow ng 
of water, during the lapse of ages, has channeled and exca- 
vated to its present form.” Long’s Expedit., Vol. 1. p. 40. 
Mr. Buckland presents us with the following summary 
of the evidence of an universal deluge, derived from the 
general diffusion of diluvium and vallies of denudation. 
1. The general shape and position of hills and valleys ; 
that mark ii course of a common river : and the latter, 
in those cases which are called salloyt of denudation, being 
attended with such phenomena as show them to owe their 
existence entirely to excavation under the action a a flood 
of wa 
is The almost universal oondectes and successive 
ducts them to the sea ; and the rare interruption of their 
courses by transverse barriers producing lakes.” - 
“3, The occurrence of detached insulated masses of © 
horizontal strata, eee iti at considerable distances - 
e beds of w y once evidently formed a con- | 
; part, and from which they have been separated at 
nt period by deep and precipitous valleys of gona 
dation.” 
““4, The immense deposites of gravel that occur occa- 
sionally on the summits of hills, and almost universally in 
valleys over the whole world ; in situations to which no 
Orrents or rivers that are now in action could ever have 
drifted them.” 
