Sunday, March 8, 2020

CYW 139 White Dome Geyser

Water temperature 188°F.  Eruption interval 12-24 minutes (nominal).  Eruption duration 2 minutes.  Eruption height 10-30 feet.  Named by the 1871 Hayden Expedition, the name is descriptive of the white-colored deposits found in the area.  The sinter cone, built upon an older hot spring mound, is 20 feet high.  It is an older cone built up by spray.  The orifice is now less than four inches in diameter and continued internal deposits may seal it up.  An eruption occurs moments after splashing begins.  The eruption starts with jets of water progressing into steam and spray.  The geyser is temperamental and irregular, and intervals between eruptions can occur from ten minutes to one and a half hours.
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