. Annual report. 1st-12th, 1867-1878. Geology. GEOLOGICAL SURVEY OF THE TEEEITOEIES. 117 the large orifice. The bottom of this great reservoir is covered with thick spongiform masses, and in addition the rim is most elegantly adorned with countless pearl-like beads, of all sizes. * There are sev- eral beautiful triangular reservoirs, 1^ by 3 feet, set around the outer sides of the rim, with numerous smaller ones, full of clear water, with Fig. 48. .</.///. ''?'lipss;^*^^.,,*"..^;::;; GRAND GEYSER, UPPER BASIN G E Y S E R, F I R E-H O CE RIVER. hundreds of small depressions most beautif
. Annual report. 1st-12th, 1867-1878. Geology. GEOLOGICAL SURVEY OF THE TEEEITOEIES. 117 the large orifice. The bottom of this great reservoir is covered with thick spongiform masses, and in addition the rim is most elegantly adorned with countless pearl-like beads, of all sizes. * There are sev- eral beautiful triangular reservoirs, 1^ by 3 feet, set around the outer sides of the rim, with numerous smaller ones, full of clear water, with Fig. 48. .</.///. ''?'lipss;^*^^.,,*"..^;::;; GRAND GEYSER, UPPER BASIN G E Y S E R, F I R E-H O CE RIVER. hundreds of small depressions most beautifully scalloped. As we recede from the rim, the waters as they pass slowly away produce, by evaporation, broad shallow basins, with thin, elegantly colored partitions, portions of which have the form of toad-stools. When the water set- tles into these depressions, or flows away toward the river in nume- rous small channels, the wonderful variety of coloriDg which is so attractive to the eye is produced. The large orifice seems to be in a state of violent agitation as often as once in twenty minutes, raising up the entire mass of water 10 or 15 feet. It is never altogether quiet. Although these two orifices are within the same rim, I could not ascertain that there is the slightest connection with each other. When the large orifice is much agitated it does not disturb the equanimity of the Grand Geyser. They both operate perfectly independent of each other. Indeed, I do not know that there is a connection between any of the springs in the whole basin, though there may be in some rare cases. The Grand Geyser operated twice while we were in the basin, with an interval of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Geological and Geographical Survey of the Territories (U. S. ); United States. General Land Off
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