Himalayan Journals — Volume 2: Or, Notes of a Naturalist in Bengal, the Sikkim and Nepal Himalayas, the Khasia Mountains, etc.Hooker, Joseph Dalton
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Himalayan Journals — Volume 2: Or, Notes of a Naturalist in Bengal, the Sikkim and Nepal Himalayas, the Khasia Mountains, etc.
Hooker, Joseph Dalton
Himalaya Mountains -- Description and travel; Natural history -- Himalaya Mountains
The terminal moraine is about 500 feet high, quite barren, and thrown
obliquely across the valley, from north-east to south-west,
completely hiding the glacier. From its top successive smaller
parallel ridges (indicating the periodic retirements of the glacier)
lead down to the ice, which must have sunk several hundred feet. This
glacier descends from Kinchinjhow, the huge cliff of whose eastern
extremity dips into it. The surface, less than half a mile wide, is
exceedingly undulated, and covered with large pools of water, ninety
feet deep, and beds of snow, and is deeply corroded; gigantic blocks
are perched on pinnacles of ice on its surface, and the gravel cones*
[For a description of this curious phenomenon, which has been
illustrated by Agassiz, see "Forbes's Alps," p. 26 and 347.] are
often twenty feet high. The crevassing so conspicuous on the Swiss
glaciers is not so regular on this, and the surface appears more like
a troubled ocean; due, no doubt, to the copious rain and snow-falls
throughout the summer, and the corroding power of wet fogs.
The substance of the ice is ribboned, dirt-bands are seen from above
to form long loops on some parts, and the lateral moraines, like the
terminal, are high above the surface. These notes, made previous to
reading Professor Forbes's travels in the Alps, sufficiently show
that perpetual snow, whether as ice or glacier, obeys the same laws
in India as in Europe; and I have no remarks to offer on the
structure of glaciers, that are not well illustrated and explained in
the abovementioned admirable work.
Its average slope for a mile above the terminal moraines was less
than 5 degrees, and the height of its surface above the sea 16,500
feet by boiling-point; the thickness of its ice probably 400 feet.
Between the moraine and the west flank of the valley is a large lake,
with terraced banks, whose bottom (covered with fine felspathic silt)
is several hundred feet above that of the valley; it is half a mile
long, and a quarter broad, and fed partly by glaciers of the second
order on Chango-khang and Sebolah, and partly by filtration through
the lateral moraine.
Illustration--GNEISS-BLOCK WITH GRANITE BANDS, ON THE KINCHINJHOW
GLACIER.
CHAPTER XXIII.
Public-domain text, read in full here on John Shaqi.
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