Notice of Hayden's Geological Essays. 49 
something like correct ideas of the causes and operations, 
by which they were te and aes too of he 
times at which they took 
mong the most ot as ook hese i Sawa hick 
inay be considered, as being one of the most. interesting fea- 
tures in the geology of this epuatey is the alluvial region, 
skirting the Atlantic ocean. 
It is. this which constitutes. the sciatiioa subject of the 
present work, and in the examination of which, he has en- 
deavoured to adduce facts sufficiently numerous and strong, 
to. ae that ‘the: whole Tegion, with the attendant phenom- 
e ation of currents, that flowed 
sat t eee Tee. 8 a = north to 
Petes ott ee a redineamlesties side's ge aa as th 
nobis Pea ‘2 BER Se gate Sa gb: Pe eae ees a 
1e ‘the vast all uvial distric 
Fes ope hasever. appeared tous,as it do sto 
den, as a very interesting geological fact, and by no. 
means, 
to be accounted for by the commonly received opinions re~ 
specting alluvion. In Mr. Hayden’s view, there is no cir- 
cumstance that affords so strong an evidence of the cause 
of its rseesna es as a of its having been deposited by a 
general h, at some copa period, ie 
2 whole continen 
eo pmperet 3 and 
2 
west.” 
sername leapatanesd tan the smallest 
Seer favour, will be. struck with the. ‘numerous ~ 
which the author has adduced in its support. 
e almost universal existence of. rolled Eo mag = 
bahia not. age on eae Ata oe Posen 
. 
SEE ee eh are | rivers. Ae ME ees al 
