Castle Geyser

Castle Geyser
Steam phase of Castle Geyser
Name origin	Named on September 18, 1870 by members of the Washburn-Langford-Doane Expedition
Location	Upper Geyser Basin, Yellowstone National Park, Teton County, Wyoming
Coordinates	44°27′48″N 110°50′12″W / 44.463445°N 110.83666°W / 44.463445; -110.83666[1]
Elevation	7,333 feet (2,235 m)[2]
Type	Cone geyser
Eruption height	90 feet (27 m)
Frequency	15 to 17 hours
Duration	20 minutes
Southern section of Upper Geyser Basin

Castle Geyser is a cone geyser in the Upper Geyser Basin of Yellowstone National Park. It is noted for the particularly large geyserite sinter deposits, which form its cone. These deposits have been likened in appearance to a castle.^[3]

When the geyser was given this name in 1870, the top edges of the structure resembled the typical profile associated with the modern concept of a castle, having the appearance of a large keep, multiple turrets, and especially because of the crenellation along the top edges of what resembled its towers. As the drawing below shows the cone had distinctive appearance at the time. Over time the cone's shape changes because of the layers of mineral deposited in successive eruptions.