Here We
Landed, And Climbed Across A Mile Or So Of Rough Boulder-Beds, And
Back Upon The Wildly Broken, Receding Front Of The Glacier, Which,
Though It Descends To The Level Of The Sea, No Longer Sends Off
Bergs.
Many large masses, detached from the wasting front by
irregular melting, were partly buried beneath mud, sand, gravel, and
boulders of the terminal moraine.
Thus protected, these fossil
icebergs remain unmelted for many years, some of them for a century
or more, as shown by the age of trees growing above them, though
there are no trees here as yet. At length melting, a pit with sloping
sides is formed by the falling in of the overlying moraine material
into the space at first occupied by the buried ice. In this way are
formed the curious depressions in drift-covered regions called
kettles or sinks. On these decaying glaciers we may also find many
interesting lessons on the formation of boulders and boulder-beds,
which in all glaciated countries exert a marked influence on scenery,
health, and fruitfulness.
Three or four miles farther down the bay, we came to another fiord,
up which we sailed in quest of more glaciers, discovering one in each
of the two branches into which the fiord divides. Neither of these
glaciers quite reaches tide-water. Notwithstanding the apparent
fruitfulness of their fountains, they are in the first stage of
decadence, the waste from melting and evaporation being greater now
than the supply of new ice from their snowy fountains.
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