The Discovery of Yellowstone Park / Journal of the Washburn Expedition to the Yellowstone and Firehole Rivers in the Year 1870

by Nathaniel Pitt Langford

Friday, September 2.—To-day we have occupied ourselves in examining the springs and other wonders at this point. At the base of the foot-hills adjoining our camp are three large springs of thick boiling mud, the largest of which resembles an immense cauldron. It is about thirty feet in diameter, bordered by a rim several feet wide, upon which one can stand within reach of the boiling mass of mud, the surface of which is four or five feet below the rim enclosing it, the rim being a little raised above the surrounding level. Some twelve or fifteen rods from this spring are two other springs from ten to twelve feet in diameter. Near by is a hot (not boiling) spring of sulphur, fifteen to eighteen feet in diameter, too hot to bathe in. From these we passed over the timbered hill at the base of which these springs are situated. In the timber along the brow of the hill and near its summit, and immediately under the living trees, the hot sulphur vapor and steam issue from several fissures or craters, showing that the hottest fires are raging at some point beneath the surface crust, which in a great many places gives forth a hollow sound as we pass over it. Through a little coulee on the other side of the hill runs a small stream of greenish water, which issues from a small cavern, the mouth of which is about five feet high and the same dimension in width. From the mouth, the roof of the cavern descends at an angle of about fifteen degrees, till at the distance of twenty feet from the entrance it joins the surface of the water. The bottom of the cavern under the water seems to descend at about the same angle, but as the water is in constant ebullition, we cannot determine this fact accurately. The water is thrown out in regular spasmodic jets, the pulsations occurring once in ten or twelve seconds. The sides and mouth of this cavern are covered with a dark green deposit, some of which we have taken with us for analysis. About two hundred yards farther on is another geyser, the flow of which occurs about every six hours, and when the crater is full the diameter of the surface is about fourteen feet, the sides of the crater being of an irregular funnelshape, and descending at an angle of about forty-five degrees. At the lowest point at which we saw the water it was about seven feet in diameter on the surface. One or another of our party watched the gradual rise of the water for four or five hours. The boiling commenced when the water had risen half way to the surface, occasionally breaking forth with great violence. When the water had reached its full height in the basin, the stream was thrown up with great force to a height of from twenty to thirty feet, the column being from seven to ten feet in diameter at the midway height of the column, from bottom to top. The water was of a dark lead color, and those portions of the sides of the crater that were overflowed and then exposed by the rise and fall of the water were covered with stalagmites formed by the deposit from the geyser.

While surveying these wonders, our ears were constantly saluted by dull, thundering, booming sounds, resembling the reports of distant artillery. As we approached the spot whence they proceeded, the ground beneath us shook and trembled as from successive shocks of an earthquake. Ascending a small hillock, the cause of the uproar was found to be a mud volcano—the greatest marvel we have yet met with. It is about midway up a gentle pine-covered slope, above which on the lower side its crater, thirty feet in diameter, rises to a height of about thirty-five feet. Dense masses of steam issue with explosive force from this crater, into whose tapering mouth, as they are momentarily dispelled by the wind, we can see at a depth of about forty feet the regurgitating contents. The explosions are not uniform in force or time, varying from three to eight seconds, and occasionally with perfect regularity occurring every five seconds. They are very distinctly heard at the distance of half a mile, and the massive jets of vapor which accompany them burst forth like the smoke of burning gunpowder.

Some of these pulsations are much more violent than others, but each one is accompanied by the discharge of an immense volume of steam, which at once shuts off all view of the inside of the crater; but sometimes, during the few seconds intervening between the pulsations, or when a breeze for a moment carries the steam to one side of the crater, we can see to the depth of thirty feet into the volcano, but cannot often discover the boiling mud; though occasionally, when there occurs an unusually violent spasm or concussion, a mass of mud as large in bulk as a hogshead is thrown up as high as our heads, emitting blinding clouds of steam in all directions, and crowding all observers back from the edge of the crater. We were led to believe that this volcano has not been long in existence; but that it burst forth the present summer but a few months ago. The green leaves and the limbs of the surrounding forest trees are covered with fresh clay or mud, as is also the newly grown grass for the distance of 180 feet from the crater. On the top branches of some of the trees near by—trees 150 feet high—we found particles of dried mud that had fallen upon the high branches in their descent just after this first outburst, which must have thrown the contents of the volcano as high as 250 or 300 feet. Mr. Hauser, whose experience as an engineer and with projectile forces entitles his opinion to credit, estimates from the particles of mud upon the high trees, and the distance to which they were thrown, that the mud had been thrown, in this explosion, to the height of between 300 and 400 feet. By actual measurement we found particles of this mud 186 feet from the edge of the crater.

We did not dare to stand upon the leeward side of the crater and withstand the force of the steam; and Mr. Hedges, having ventured too near the rim on that side, endangered his life by his temerity, and was thrown violently down the exterior side of the crater by the force of the volume of steam emitted during one of these fearful convulsions. General Washburn and I, who saw him fall, were greatly concerned lest while regaining his feet, being blinded by the steam, and not knowing in which direction to turn, he should fall into the crater.

Between the volcano, the mud geyser and the cavern spring are a number of hot sulphur and mud springs, of sizes varying from two to twenty feet in diameter, and many openings or crevices from which issue hot vapor or steam, the mouths of which are covered with sulphur deposits or other incrustations.

From the mud volcano we moved up the valley about four miles to our camp on the river, passing several mud puffs on the way. One of the soldiers brought in a large string of river trout, but the water of the river is strongly impregnated with the overflow from springs near its bank, and is not palatable. Some of our party who have drank the water are feeling nauseated. Others think that their illness is caused by partaking too freely of one of the luxuries of our larder, canned peaches. I assuaged my thirst with the peaches, and have not partaken of the water, and there is no one in our camp in finer condition than I am.

Lieutenant Doane's felon has caused him great suffering to-day, and I have appealed to him to allow me to lance it. I have for many years carried a lancet in my pocketbook, but I find that I have inadvertently left it at home. So all this day, while on horseback, I have been preparing for the surgical operation by sharpening my penknife on the leathern pommel of my saddle as I rode along. I have in my seamless sack a few simple medicines, including a vial of chloroform. Lieutenant Doane has almost agreed to let me open the felon, provided I put him to sleep with the chloroform; but I feel that I am too much of a novice in the business to administer it. However, I have told him that I would do so if he demanded it. Our elevation to-day is about 7,500 feet above sea level.

Saturday, September 3.—This morning General Washburn and I left camp immediately after breakfast and returned four miles on our track of September 1st to Crater Hill and the mud springs, for the purpose of making farther examinations. We found the sulphur boiling spring to be full to overflowing, the water running down the inclined surface of the crust in two different directions. It was also boiling with greater force than it was when we first saw it, the water being occasionally thrown up to the height of ten feet. About 80 or 100 yards from this spring we found what we had not before discovered, a boiling spring of tartaric acid in solution, with deposits around the edge of the spring, of which we gathered a considerable quantity. In the basin where we had found so many mud springs we to-day found a hot boiling spring containing a substance of deep yellow color, the precise nature of which we could not readily ascertain. We accordingly brought away some of it in a bottle (as is our usual custom in such cases of uncertainty), and we will have an analysis of it made on our return home. In the same basin we also found some specimens of black lava.

A half mile south of these springs we found an alum spring yielding but little water and surrounded with beautiful alum crystals. From its border we obtained a great many curiously shaped deposits of alum slightly impregnated with iron. The border of this spring below the surface had been undermined in many places by the violent boiling of the water, to the distance of several feet from the margin, so that it was unsafe to stand near the edge of the spring. This, however, I did not at first perceive; and, as I was unconcernedly passing by the spring, my weight made the border suddenly slough off beneath my feet. General Washburn noticed the sudden cracking of the incrustation before I did, and I was aroused to a sense of my peril by his shout of alarm, and had sufficient presence of mind to fall suddenly backwards at full length upon the sound crust, whence, with my feet and legs extended over the spring, I rolled to a place of safety. But for General Washburn's shout of alarm, in another instant I would have been precipitated into this boiling pool of alum. We endeavored to sound the depth of this spring with a pole twenty-five feet long, but we found no bottom.

Everything around us—air, earth, water—is impregnated with sulphur. We feel it in every drop of water we drink, and in every breath of air we inhale. Our silver watches have turned to the color of poor brass, tarnished.