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| 0037 |
Explorations in Turkestan : Expedition of 1904 : vol.2 |
Captions
| [Photo] 437 |
A Glacier Northeast of Kara Kul. |
Citation Information
OCR Text
reach a great thickness. During this epoch the lake appears to have stood at the
120-foot level, and these beaches are worn fully as long as those of the second
epoch. The third epoch, therefore, appears to have lasted for the same order of
time as the second, though its glaciers were only half as long. In fig. 436, the
fourth-epoch moraine is seen as a mass of loosely piled angular blocks overlying
the third-epoch moraine of which the smooth surface forms the base of the picture.
Long after these three had come to a close, there came a fourth advance to
about one-half the distance of the third, but of far less than half the same duration,
for its moraines are insignificant when compared to them. And this one came to
a close so recently that its moraines have suffered scarcely any surface weathering,
whereas those of preceding epochs have been much worn by wind; even the third
one can be ridden over, while granite moraines of the first epoch have been smooth-
planed into mosaic floors, the interspaces filled with the arkose residuum of long
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