NISQUALLY GLACIER RECEEDS EIGHTY-NINE FEET.
On November 4, 1928 Asst. Chief Ranger Macy and the Naturalist
measured the recession of the Nisqually Glacier and found that the past
year witnessed a recession of eight nine feet. This is the greatest
recession recorded since 1921 when a recession of 106 feet was
tabulated.
The glaciers of Mount Rainier, like all glaciers throughout the
world, are gradually receeding for the annual replentishment by the
heavy snowfall on the Mountain's flanks is not sufficient to make up for
the melting at the terminus. Glaciers are all reminders of the ice age
of many years ago and are remnants of either great ice cap itself of of
local glaciation such as occurred in the region of the Rocky Mountain
National Park in Colorado. Mount Rainier's glaciers once merged with
the lobe or finger of the ice cap that pushed south along the Cascades
from its southern terminus. When the ice cap receeded Rainier's
glaciers remained, fed by the extremely heavy snowfall on the sides of
the Mountain. These, too, gradually worked backward as the years went
by until in 1885, according to F.M. Matthes who has made extensive
geological studies of the Mountain, the terminus of the Nisqually
occupied the point where the Nisqually Glacier Bridge now stands. Today
it is over a half mile removed from that point.
From 1857 to 1924 it receeded 2615 feet. During the past four years
it has melted back eighty nine, forty three, eighty six and seventy
three feet respectively. However, if you are interested in glaciers
don't cancel your plans for a visit to the Mountain. Mt. Rainier boasts
of the greatest glacial system radiating from a single peak in the
United States. There are 28 glaciers in all and several of them are
over five miles long.
HOW CLEAR THE STREAMS ARE!
Do you, who have seen the streams of the Park during the summer,
remember the milky consistency of the water? You were told, if you made
inquiry as to the cause of this, that such coloration is due to the
presence of "glacial four" or powdered rock that is the result of the
grinding action of the glaciers as they move slowly down the
mountainside. Countless numbers of these minute particles of rock give
the streams that milky color in the summertime.
At present the streams are practically clear. The downward movement
of the glaciers practically ceases during the winter months and thanks
to the heavy snow are enjoying a period of partial recuperation from the
melting that took place during the warm summer months. In spite of the
fact that the glaciers on the Mountain are gradually moving down the
melting at the terminus more than offsets this movement so that actually
they are receeding (see above). During the summer the downward movement
is very noticeable because of the glacial flour that results from the
grinding action of the ice as it passes over its bed and widens its
channel.