The great mass of water falls directly back into the basin, flowing over the edges and down the sides in large streams. When the action ceases, the water recedes from sight, and nothing is heard but an occasional escape of steam until another eruption occurs.
Just across the river and close to the margin, a small conical mound is observed, about three feet high, and five feet in diameter at the base.
No one would suspect it to be an active geyser. But in 1871, a column of water entirely filling the crater shot from it, which by actual measurement was found to be two hundred and nineteen feet high.
Not more than a hundred yards from the river, there is a large oval aperture eighteen feet wide and twenty-five feet long. The sides are covered with a grayish-white deposit which is distinctly visible at a depth of a hundred feet below the surface.
This geyser is known as the "Giantess," and a visitor in describing it states that "no water could be discovered on the first approach, but it could be distinctly heard gurgling and boiling at a great distance below. Suddenly it began to rise, spluttering and sending out huge volumes of steam, causing a general scattering of our company.
"When within about forty feet of the surface, it became stationary, and we returned to look upon it. All at once it rose with incredible rapidity, the hot water bursting from the opening with terrific force, rising in a column the full size of this immense aperture to the height of sixty feet.
"Through, and out of the top of this mass, five or six lesser jets or round columns of water, varying in size from six to fifteen inches in diameter, were projected to the marvelous height of two hundred and fifty feet."
THE CAÑONS OF THE COLORADO RIVER.
The length of the Colorado River, from the sources of the Green River, is about two thousand miles.