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Chapter 8 SECOND SUCCESSFUL ASCENT, 1870

Word Count: 2122    |    Released on: 06/12/2017

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plished by S. F. Emmons and A. D. Wilson of the Geological Exploration of the Fortieth Parallel. Samuel Franklin Emmons was

ys: "There is not a geological society or even a mining camp from Arctic Finland to the Transvaal, or from Alaska to Australia, where Emmon

an Journal of Science for March, 1871. It is here reproduced from that source. The photograph of Mr. Emmons was

the name of White River which it feeds. It is peculiarly appropriate that that glacier should b

ons, Mr. A. D. Wilson and I visited this mountain in the early part of October, 1870, and carried the work of making its complete survey, both geological and topographical, as far as the lateness of the season and the means at our disposal would permit. As the topographical work has not yet been plotted,

covered by a névé having a slope of from 28° to 31°. This névé extending from the shoulders of the southwestern peak to those of the northern, a width of several miles, descends to a vertical distance of about 2000 feet below the crater rim, an immense sheet of white granular ice, having the general form of the mountain surface, and broken only by long transverse crevasses, one of those observed being from one to two miles in length: it is then divided up by the several jutting rock-masses or shoulder of the mountain into the Nisqually,

atively regular slope in its whole length below the cascades. There are some indications of dirt-bands on its surface, when seen from a considerable elevation. Toward its lower end it is very much broken up by transverse and longitudinal crevasses: this is due to the fact, that it has here cut th

of the glaciers, if I may be allowed the expression, are about three miles apart. From the jutting edge of this cliff hang enormous icicles from 75 to 100 feet in length. The slope of this glacier is less regular, being broken by subordinate ice cascades. Like the Nisqually its lower ext

d an unusually large moraine at its western side, which rises several hundred feet above the surface of the glaciers, and partakes of the character of both lateral and terminal moraines: the main medial moraine of the glacier joins this near its lower end. This medial moraine proceeds from the cliff which

ormed part of the crust of the mountain, but now stands isolated, a jagged peak rising about 3000 feet above the glaciers at its foot, so steep that neither ice nor snow rest upon it. One of the tributar

These end generally in perpendicular cliffs overhanging the rocky amphitheaters at the heads of the smaller streams which flow eastward into the Cowlitz. Looking up from the bottom of one of these amphitheate

ittle extent. The first two are, however, interesting from the vein structure which they exhibit; they both originate in an irregularly oblong basin, having the shape somewhat of an inclined ellipse, turning on its longer diameter, the outlets of the glacier being opposite the foci. Seen from a high point the veins form concentric lines generally parallel to the sides of the basin; th

and a half; its length can be scarcely less than ten miles. The great eroding power of glacial ice is strikingly illustrated in this glacier, which seems to have cut down and carried away on the northeastern side of the mountain, fully a third of its mass. The thickness of rock cut away as shown by the walls on either side, and the isolated pea

n these are great cascades, and below immense transverse crevasses, which we had no time or means to visit. The surface water flows in rills and brooks, on the lower portion of the glacier, and moulins are of frequent occurrence. We visited one double moulin where two b

the brown gravel-covered ice of the end of the glacier. On the back of the rocky spur, which divides these two glaciers, a secondary glacier has scooped out a basin-shaped bed, and sends down an ice stream, having all the characteristics of a true glacier, but its ice disappears several miles above the mouths of the large glaciers on either side. Were nothing known of the m

by the mountain from our view, proceeding thus from an isolated peak, for

ey W

tograph ta

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