The deposit covers the side of the mountain to an elevation of 600 feet above the lake shore. The huge white mass of silica, covering an area half a mile square, can be seen from any position on the lake shore, whence it appears like an immense bank of snow. In the valley near Pelican Creek, a few springs issue from beneath the crust, distributing their waters over the bottom and depositing oxide of iron, sulphur, and silica in the most beautiful blending of gay colors. Although the waters of the springs are 160° in temperature, the channels are lined with a thick growth of mosses and other plants, and in the water is an abundance of vividly green vegetation. The mass of hot-spring material built up here cannot be less than 400 feet in thickness. A large portion of it is pudding-stone or conglomerate. Some of the masses inclosed in the fine white silicious cement are themselves globes of pure white silica, eight inches in diameter. It is plain, from the evidence still remaining, that this old ruin has been the theatre of tremendous geyser action at some period not very remote, and that the steam-vents, which are very numerous, represent only the dying stages. These vents or chimneys are richly adorned with brilliant yellow sulphur, sometimes as a hard amorphous coating, and sometimes in delicate crystals that vanish like frost-work at the touch. It seems that it is only during the last stages of these springs that they adorn themselves with these brilliant and vivid colors. Hot springs are scattered along the valley of the creek for several miles, some of them of considerable size and beauty. The average width of the valley is about two miles; the heat from the springs and the extremely fertile soil combining to fill the valley with abundant vegetation. At the northeastern corner of the lake, five or six miles from the outlet, is a long, low spit of land built out into the lake by ancient geyser action. A few roaring steam-vents, giving name to the point, are all that remain of the violent action that once characterized the place. The hot spring area is four or five miles long by two wide; the ground in many places being perforated like a cullender with simmering vents. A mile or so from the lake is a large pond where there is another extensive group of springs, depositing sulphur, alum, common salt, and staining the ground with oxide of iron.