Travels in Alaska | Page 6

on the objects close about you--the crowded spires of the spruces and hemlocks rising higher and higher on the steep green slopes; stripes of paler green where winter avalanches have cleared away the trees, allowing grasses and willows to spring up; zigzags of cascades appearing and disappearing among the bushes and trees; short, steep glens with brawling streams hidden beneath alder and dogwood, seen only where they emerge on the brown algae of the shore; and retreating hollows, with lingering snow-banks marking the fountains of ancient glaciers. The steamer is often so near the shore that you may distinctly see the cones clustered on the tops of the trees, and the ferns and bushes at their feet.
But new scenes are brought to view with magical rapidity. Rounding some bossy cape, the eye is called away into far-reaching vistas, bounded on either hand by headlands in charming array, one dipping gracefully beyond another and growing fainter and more ethereal in the distance. The tranquil channel stretching river-like between, may be stirred here and there by the silvery plashing of upspringing salmon, or by flocks of white gulls floating like water-lilies among the sun spangles; while mellow, tempered sunshine is streaming over all, blending sky, land, and water in pale, misty blue. Then, while you are dreamily gazing into the depths of this leafy ocean lane, the little steamer, seeming hardly larger than a duck, turning into some passage not visible until the moment of entering it, glides into a wide expanse--a sound filled with islands, sprinkled and clustered in forms and compositions such as nature alone can invent; some of them so small the trees growing on them seem like single handfuls culled from the neighboring woods and set in the water to keep them fresh, while here and there at wide intervals you may notice bare rocks just above the water, mere dots punctuating grand, outswelling sentences of islands.
The variety we find, both as to the contours and the collocation of the islands, is due chiefly to differences in the structure and composition of their rocks, and the unequal glacial denudation different portions of the coast were subjected to. This influence must have been especially heavy toward the end of the glacial period, when the main ice-sheet began to break up into separate glaciers. Moreover, the mountains of the larger islands nourished local glaciers, some of them of considerable size, which sculptured their summits and sides, forming in some cases wide cirques with canyons or valleys leading down from them into the channels and sounds. These causes have produced much of the bewildering variety of which nature is so fond, but none the less will the studious observer see the underlying harmony--the general trend of the islands in the direction of the flow of the main ice-mantle from the mountains of the Coast Range, more or less varied by subordinate foothill ridges and mountains. Furthermore, all the islands, great and small, as well as the headlands and promontories of the mainland, are seen to have a rounded, over-rubbed appearance produced by the over-sweeping ice-flood during the period of greatest glacial abundance.
The canals, channels, straits, passages, sounds, etc., are subordinate to the same glacial conditions in their forms, trends, and extent as those which determined the forms, trends, and distribution of the land-masses, their basins being the parts of the pre-glacial margin of the continent, eroded to varying depths below sea-level, and into which, of course, the ocean waters flowed as the ice was melted out of them. Had the general glacial denudation been much less, these ocean ways over which we are sailing would have been valleys and canyons and lakes; and the islands rounded hills and ridges, landscapes with undulating features like those found above sea-level wherever the rocks and glacial conditions are similar. In general, the island-bound channels are like rivers, not only in separate reaches as seen from the deck of a vessel, but continuously so for hundreds of miles in the case of the longest of them. The tide-currents, the fresh driftwood, the inflowing streams, and the luxuriant foliage of the out-leaning trees on the shores make this resemblance all the more complete. The largest islands look like part of the mainland in any view to be had of them from the ship, but far the greater number are small, and appreciable as islands, scores of them being less than a mile long. These the eye easily takes in and revels in their beauty with ever fresh delight. In their relations to each other the individual members of a group have evidently been derived from the same general rock-mass, yet they never seem broken or abridged in any way as to their contour lines, however abruptly they may dip their sides. Viewed one by one, they