Under the caption "How the Gold Came to Klondyke Placers," Professor George Frederick Wright, of Oberlin College, author of "Man in the Glacial Period" and other geological works, has contributed to the New York Journal an interesting article in which he says:
"The discovery of gold in large quantities on the Yukon River is by no means unexpected. Eleven years ago, the last word I heard as I left Juneau was the pledge of a returning tourist to meet his friend the next Summer and prospect in the Yukon region.
"The great mass of gold-bearing quartz at the Treadwell mine, near Juneau, was what might be expected, and at the same time what might be the limitation of the supply. For more than ten years that mine has furnished more than a million dollars of gold annually, but it is not like ordinary quartz mines. It is rather a great, isolated mass of quartz with gold disseminated all through it. While its worth is great, its length is limited.
"Little is known about the geology of the Yukon River, where the Klondyke mines have been found. Being placer mines, the gold may have been transported many miles. The means of transportation are both glaciers and rivers. The Klondyke region is on the north side of the St. Elias Alps. Alaska was never completely covered with glacial ice. The glaciers flowed both north and south from these summits. Dawson and Professor Russell both report well defined terminal moraines across the upper Yukon Valley. The source of the Klondyke gold, therefore, is from the South.
"Placer mines originate in the disintegration of gold-bearing quartz veins, or mass like that at Juneau. Under sub-aerial agencies these become dissolved. Then the glaciers transport the material as far as they go, when the floods of water carry it on still further. Gold, being heavier than the other materials associated with it, lodges in the crevasses or in the rough places at the bottom of the streams. So to speak, nature has stamped and "panned" the gravel first and prepared the way for man to finish the work. The amount of gold found in the placer mines is evidence not so much, perhaps, of a very rich vein as of the disintegration of a very large vein.
"The "mother lode" has been looked for in vain in California, and perhaps will be so in Alaska. But it exists somewhere up the streams on which the placer mines are found. The discovery of gold in glacial deposits far away from its native place is familiar to American geologists.
"I have encountered placer mines in glacial deposits near Aurora, in Southeastern Indiana; in Adams County, in Southern Ohio, and near Titusville, in Western Pennsylvania, where, I see, there is a new excitement. But in all these cases the gold had been brought several hundred miles by glacial ice from Canada or the region about Lake Superior. These gold mines were near the edge of the glacial region, where there had been much assorting action of both ice and water.
"It is evident, however, that in Alaska the transportation of the gold has not gone so far. The difficulties of this transportation into the Klondyke region and the shortness of the season will continue to be great drawbacks to working the mines. The pass north of Chilcoot is 7,000 feet above sea level and but a few miles back from the ocean. There is no possibility of a road over it. But from Taku Inlet, near Juneau, readier access can be had. This route was followed by Schwatka and Mr. Hayes, of the United States Geological Survey, a few years ago, and has been partially surveyed with reference to a railroad line, and reported to be available. The only other way is by a river which is open to navigation only a short time each year and is a great way around.
"The general climatic conditions on the north side of the mountains are much better than those on the south side. On the south side the snowfall is enormous, but on the north side the air is dryer. Schwatka and Hayes went in the Summer down the Yukon Valley about to the Klondyke region, and from there struck off west, passing to the north of Mount St. Elias and down the Copper River. They had dry weather all the time, in which camping was pleasant, while Russell the same season was driven back by inclement weather from ascending St. Elias on the south side. It is therefore not impossible that explorations southwest of the present gold fields may be carried on with comparative ease. But at present that whole region is bare of means of subsistence.