128 Scientific Intelligence. 
“ The specimens collasied in - the islands and shores of the Great 
Salt Lake are suflici o give a very good idea of the general 
geological features. "The zetia are of metamorphic a con- 
sisting of talcose and mica slates, hornblende rocks, and a few speci- 
mens of granitic or genie character. 
Some specimens of the latter description occur wong the valley of 
Ogden’s River. yk ee Island, Fremont Island, a part of Promon- 
tory Point, and Mud Island, on the east side of the lake. judging from 
the numerous specimens, sapeiat principally of talcose and mica slates, 
with hornblende rock. Carrington Island, Hat Island, a point north by 
In several localities, as at Promontory Point and near Mud Island, the 
metamorphic strata appear to be overlaid by a coarse conglomerate, or 
oarse ea which is partially altered, and assumes the character 
of a quartz 
From all the facts i in my possession, it would appear that these pots 
limestone. Judging from oi relative position of the limestone, 
the metamorphic rocks of Antelope and, Frémont’s Islands, the eer 
axes, occasioned by the elevation of the epi Ri beds. We may 
has also, that the same limestone my Ne ens a Ae the elevated 
e 
the mparinive in the region of the Salt Lake, we are left to infer that 
the coal is to be sought (as elsewhere) above the limestone. Since the 
pater: of coal is proved in one point, (admitting the signi in 
favor of its age being that of the carboniferous 5 oes yw war- 
‘ranted in the conclusion that it once existed over a much w der area, 
and can be sought with success in ie Manconet aes aloha he impor 
