National Geographic : 1892 Mar 21
Configuration of the Coasts. beaches about Yakutat bay,* indicating that the land there has risen, whereas the submerged trees in Muir inlet show that this region is sinking. These striking facts seem to show that the valley between the Fairweather mountains and Glacier bay fol lows the line of an immense fault, which brings Tertiary and Paleozoic rocks into close juxtaposition. It is most unfortunate that we have no observations on the Fairweather mountains that will enable us to confirm or correct this interesting indication. GLACIER BAY AND MUIR INLET. Glacier bay itself has not been surveyed; the delineation in the coast survey charts is correct only in its general outline. It trends northwest and southeast, and is about forty miles long by ten wide. There are a great many islands in the bay. The Beardslee islands, which fill the eastern side for a distance of about twenty miles from its mouth, are made up, at any rate in part, of modified glacial till, and are generally thickly wooded, as are also the shores in the lower part of the bay. The channels between these islands are narrow, and often give one the im pression of waterways cut through the land. The islands in the upper part of the bay are quite different; they are of solid rock, and are scored, polished, and rounded by glacial action. They occur singly, are usually elongated, and have the longer axis parallel to the nearest shore. They, like the mainland, descend abruptly into the water, and only at long intervals can even a small beach be found. In this part there are no trees. Several glaciers force their way down to the water level and discharge bergs into the bay; most of them end in narrow inlets two or three miles back from the bay proper. Muir glacier is of this type; its inlet, which runs nearly north and south, has its south western terminus on Glacier bay about five miles from the end of the glacier; the eastern shore line rounds gradually into the bay without well marked headlands. The inlet gradually nar rows as we approach the glacier, being about one and a half miles wide at its upper end. On each side are deposits of roughly stratified sands and gravels, covered with a thin layer of moraine debris. On the western side these deposits form a comparatively level plateau from 150 to 200 feet high, which extends about four miles south of the present ending of the gla * Op. cit., p. 82.
1892 May 15
1892 Feb 19