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gaa SU SRA SG ese Re Theis E ead oe 
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contains a strong brine, and is without outlet, but 
1876.] The Great Salt Lake in Former Times. 681 
od on the African plateau, with its outlet the Congo, and 
e ancient Lake Bonneville, with its former outlet flowing either 
i or le or in both directions? Judging by the fossil 
fi D 2 ani in the Bonneville beds they must, it seems to 
D tee in the lake itself, for it is well known that brackish 
Siok = ets support fresh-water molluscs and fish. Is it not 
i <h bs at the ancient Great Salt Lake was once simply brack- 
4 o 8 eng ge to er desiccation of the continent, its 
attr catine ? ed up and the lake contracted, it became 
| aaa the supposed former outlet of Great Salt Lake, Mr. 
a eae the views of Professor Marsh and Bradley that 
es. Py towards the north, into the Snake River Valley. 
il m %4 ake was, Mr. Gilbert adds, but one of a group, as 
w # tie lave filled the valleys of the Great Basin. “ In the 
y Eo which overflowed may probably be included all of 
poe i tier, bordering on the present drainage system of 
Eoo M River, and those which, lying at the feet of the 
2... range and. the Sierra Nevada, received the streams 
a sera mountains. What we know of the Death Valley 
R southwesterly basins tends to show that they were 
Oe ely filled. 
a a interesting group of lakes t 
e. evada survive the general desice 
ek nis that the most southerly. Owen’s Lake lies in a 
Oval ween the Sierra Nevada at the west, and the Inyo and 
ies eS at the east, and receives its water from Owen’s 
sa ‘ ich, rising seventy miles at the north, follows the trough 
d accumulates the streams from the adjacent mountains. It 
it is sur- 
hat along the base of the 
ation, our route touched 
in the sands of the most ele- 
of Anodonta, testifying 
did not exceed its mod- 
d the channel through 
d A:S: PACE- 
rou n 
% ge by ancient beaches, and 
lisse ng these are abundant specimens 
i ormer freshness. Its ancient area 
la than one or two times, an 
as 5 Magee discharged is distinctly marke 
