303 [ 174 J 
No. 35. A reddish, rather compact laya. The color is owing to the 
pres. of iron, which hastens its decomposition on exposure. 
No. reddish brecciated — lava, embracing fragments of 
eee colored iiicous sandstone o 
. Compact trap, or basalt, with a few rounded cavities. This 
Petes. is precisely like No. 20, longitude 120°; and, from the descrip- 
tion given, appears to bea prevailing rock along the valley 0: 4 Colum- 
bia ri 
49. An imperfect striped agate, with the centre of siliceous sinter. 
This, with Nos. 7 and 40, is doubtless associated with the basalt, No, 47, 
which is the prevailing ro 
Longitude 122°, ‘aikiade 454°; Cascades of the Columbia river.—From 
this place are the specimens numbered 9, 10, 13, 17, 18, 22, 24, 25, 27, 30, 
36, 37, 38, and 44. 
Of these specimens, Nos. 13 ae m are indurated clay, with impres- 
sions of pate of dicotyledonous p 
s a fine araiinceans iciars with stems and leaves, which still 
retain their fibrous structu 
0. 30 is a specimen of disotyiedonous wood , partially replaced by stony 
matter, and a portion still retaining the fibrous structure and consistency 
of partially carbonized wood. 
Nos. 10, 25, 27, and 38, are specimens of coal fiom the same locality. 
(For further information of these, see analysis of specimens’appended. ) 
No. 22. Carbonaceous earth, with pebbles, evidently a part of the forma- 
tion to which the bbls specimens are referred. 
No. 18 is a compact trap, apparently having a stratified structure. 
ots - oe oe basaltic ed with crystals of analcime, &c. 
is—one a porous or rather scoriaceous lava of a 
wadich setae vand: the other a compact gray lava, with a few small cavities. 
No. 44. A brown scoriaceo 
No. 44a. A small specitien 0 of bine lava. 
- Miscellaneous specimens. 
No. 62. A coral in soft limestone ; the structure too much obliterated to 
decide its character. (From the dividing ridge between Bear creek and 
Bear river, at a point 8,200 feetgabove tide water.) 
_— o. 71. Caleareous tufa, containing the remains of grasses, twigs, moss, 
gi 81, — tufa stained with iro 
No. 98. Ferruginous calcareous tufa, coniainiets remains of twigs, &c. 
These t ess last-named specimens are evidently the calcareous deposites 
from springs holding carbonate of lime in solution, 
et ¢ 
