— 
Mineralogy and Geology. 269 
Osirea Diluvit, Terebratula carnea and semiglobosa, by Ananchytes 
ata, Galerites vulgaris and albogalera, and similar fossils. Older 
ness of ass 5000 feet. It resembles a mighty wave, sem far 
down from the highest summits of the Caucasus and gradually dying 
away on the margin of the older formations in the plain [on the 
north]. 
Beyond the ocean the cretaceous formations terminate in the Atlan- 
to or sixteen degrees lower than in Europe. In Kentucky an 
e it remains below 37°. But it is very different far up on the Mis- 
iri ; this great river flows uninterruptedly from the foot of the Rocky 
Mountains for 1400 English miles, through strata of chalk, at least as 
far as the mouth of the Sioux river. his is the result of the accounts 
celebrated astronomer Nicollet. In these:. western pr of America 
[west ?| of Baia Fe in New Mexico, have entirely c cut off this ain. ™ - 
ceous sea. No trace of chalk was discovered either by Captain | Fre- os" 
mont on the Columbia river, or on the Humboldt river in the won “3 
ful * ion Bashi” down to the Pactiigs or yet by the cijorrann bee ~~ 
+ 
This peta is, “however, sioglal Soca limited to No rth 
America alone. “Ev ven in Mexico per beds al ady eel to * 5 
oo. Galeotti has brought Trigoniee from ehuac ap 
the | jprovin ce of Trigonk which he. Scr vee Trig 
Costata, Thi is rise: belongs - be : 
bre of “Agassi differs but slightly: 
