White Dome Geyser shoots a stream of water in the air thirty feet high for 15 to 30 minutes. Intervals between eruptions vary from 10 minutes to 3 hours. Because of this, these geysers erupt in bursts throwing spray all around instead of straight up. This is a picture of Echinus Geyser in the Norris Geyser Basin at Yellowstone National Park. Because of its location near a hillside, it is easy for observers to look down and watch the geysers pool slowly fill up, then overflow as the eruption approaches.
Echinus is the largest acid-water geyser known and produces water almost as acidic as vinegar.
It's eruptions vary from 1 to 4 hours. Echinus is named for the deposits surrounding it which look like sea urchins. Over the years the geyserite built this tower-like structure. What is most unusual about it is that the spring did not seal itself closed as it built the cone. The formation was named Liberty Cap by the Hayden Survey team that visited Yellowstone in 1871 referring the peaked caps worn during the French Revolution.