GEO 
Grotocy, North American. 
» ——, United States, account 
of, with conjectures upon, W. 
Maclure, vi, 98. 
os , causes of gen- 
eral features, &c., W. W. Math- 
er, xlix, 1, 284. 
i , ——, ibid, T. A. Con- 
rad, Xxxv, 237, 244. 
; , ——, elevation during 
the tertiary epoch, T. A. Conrad, 
xxxv, 245. 
a ae remarks on, H. 
D. "Rogers, xxviil, 74 ; xlvil, 140, 
247. 
; ——, general review 
of, E. enichonces xli, 239. 
: ibid C. Daube- 
9 3 
ny, xli, 195. 
, , relation to Rus- 
sian, R. L Murchison, xli, 208. 
: . 5 equivalency of 
rocks with European, A. Eaton, 
KX, 
‘ , oolites not oc- 
curring in, xxxvill, 126. 
: ; , rocks charac- 
teristic of, L. Vanuxem, xvi, 254. 
5 | bouldersi in, see 
Boulton and Drift. 
; , scratches in, see 
3 
Scratches. 
; 5 , cretaceous for- 
mation and its fossils, S. G. Mor- 
ton, xvn, 274, 290; xvili, 243; 
249f; xxiii, 288f; xxiv, 128f; 
xlvill, 267. 
~—_— , Ibid, a division 
in, S. G. Morton, xxviii, 277. 
: plastic clay in, 
is He Oneal: XXxvill, 91. 
; .—— secondary for- 
mations of the southern states, J. 
T. Hodge, xli, 332. 
‘ , ——, Silurian system, 
and its characteristic fossils, T. A. 
Conrad, xxxv, 248; xxxviil, 86. 
> ——, ——, ibid, H. D. Rog- 
ers, xlvii, 145. 
’ , Taconic system, 
xlvi, 149; xlvil, 150. 
102 
GEO 
GeoLoey, North American. 
. , United States, tertiary, 
essay on, J. Finch, vii, 31. 
‘ , ibid, remarks 
on, E. Hitchcock, x\i, 246. 
» ——, ——, ibid, H. D. Rog- 
ers, xlivil, 254. 
a 4 , Ibid, of Atlantic 
coast, T. A» Conrad, xxiii, 204, 
339 ; xxviii, 104, 280f; xli, 344.f 
s > ——._ ibid,ofthe South- 
ern States, J. T. Hodge, x\i, 382. 
; ; , oyster shell de- 
posits of the Atlantic coast, L. 
Vanuxem, xli, 168. 
, structure of the 
Appalachian chain, W. B. and 
HH. D. Rogers, xin, Wie saliv, 
359. 
Sy 
, notice of Ea- 
ee s Index of the Northern States, 
1, 69. 
- » —— notice of I. Lea’s 
contributions to geology, xxv, 
413. 
; , trap of New 
England, volcanic origin of, T. 
Cooper, iv, 239. 
> ——, ——, Maine, notice 
of geological reports Offs Camel. 
Jackson, xxxil, 193; xxxv, 387; 
xxxvi, 143; Seow, Ga, 
ie Soh ee oy remarks 
ony.C. 7. “Weeecm. xxXiv, 69. 
anthra- 
9 >] >) 3 
cite coal formation, C. T. Jackson, 
xxxvi, 149. 
: , dikes of 
trap of fiffeneet ages, oma lime- 
stones transformed by the same, 
C. T. Jackson, xxxvi, 145, 147. 
‘ ‘ ; ; dolomi- 
zation theory of von Buch not 
confirmed, C. T. Jackson, xxxvi, 
147. 
: : —w—, iron ore 
veins, C. T. Jacksons xxxvl, 147, 
150. 
—. , changes 
of level in, C. T. Jackson, xxxvi, 
154. 
