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  Brilliant Pool
Feature Type: Geyser
Geyser/Spring Type: Fountain geyser

Basin
Upper Geyser Basin
Complex
Daisy Group

Brilliant Pool, which is located directly south of Comet Geyser, is connected to Daisy and Splendid geysers. This connection is most easily seen during an eruption of Daisy. Prior to Daisy, Brilliant Pool is full. As Daisy erupts, the pool begins to drop. By the end of the eruption, the pool has dropped a few inches. The pool then refills with Daisy.

During a Splendid eruption Brilliant Pool drops further than it does during a Daisy eruption. If Splendid is having a series, Brilliant rarely refills completely prior to the next eruption. Thus, the pool can continue to drop further and further after each eruption. After especially large Splendid eruptions or after Splendid/Daisy Dual eruptions, Brilliant can drop far enough that it can erupt on its own. These eruptions occur in a series with each eruption lasting a few seconds and being spaced apart by about two minutes. The series only lasts a few minutes. These rare eruptions are often short, with some only breaking the surface, but some can reach over 15 feet.

Brilliant Pool, at times, has had a detrimental effect on Daisy. In the early 1950s, for instance, Brilliant started overflowing heavily and Daisy went dormant.


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