The surface expression of the
geothermal system consists of a ", opaline
sinter terrace produced by
hot spring and natural geyser (sic
fumarole) activity along the base of the Malpais Rim. Since 1959, several companies have tested the potential of the area as a source of steam for electrical power generation. The spectacular hot water and steam plume that are present at(1985/1986) vents continuously along the top of the sinter terrace is
not a natural geyser, but is a free-flowing, uncapped geothermal well." (Struhsacker, 1986, p. 111). Photos of hot springs and fumaroles – photos '9-67' (1931) and '9-56' (date unknown) – show hydrothermal activity prior to power-generation. It is unknown if those smaller hydrothermal surface features are still active as of 2015, post-power plant development; field reconnaissance would be required to assess the activity of the hydrothermal features. Photos '9-69' (close-up, date unknown) and '9-108' (distant, 1971) show the uncapped well that is not a natural geyser, which was active prior to power-production. The man-made geyser at Beowawe in central Nevada is similar to
Fly Geyser in northwestern Nevada in that both were artificially produced by geothermal drilling, but the former area was developed for clean energy production and the latter area was not. Another striking difference between the localities is an aesthetic one: more
travertine has precipitated from the hydrothermal fluids at Fly Geyser than at Beowawe, generating spectacular mounds at Fly Geyser's uncapped wellhead, thus suggesting dissimilar water chemistry between the two geothermal systems. ==Climate==