Emerald Spring


A hot spring's color often indicates the presence of minerals. In a clear blue pool, the water is absorbing all colors of sunlight except one, blue, which is reflected back to our eyes. Here in Emerald Spring's pool, another factor joins with light refraction to give this spring its color. The 27-foot (8 m) deep pool is lined with yellow sulfur deposits. The yellow color from the sulfur combines with the reflected blue light, making the hot spring appear a magnificent emerald green.

*Adapted from the NPS Norris Geyser Basin Trail Guide and the Norris Interactive Map

Feature Type

Hot Spring

Inventory ID



Latitude: 44.72565
Longitude: -110.7042
Survey Date: August 11, 1998

Geographic Area: Gibbon Canyon
Thermal Region: Norris Geyser Basin
Thermal Complex: Back Basin
Ranger District Contact: Norris District, Al Miller (307) 344-2501

Feature Data

Data Source Supplied By Sample Date Temp Vent Temp pH Cond Extended Data
Park 8/11/1998 83.3°C 0°C 4.55 2600 µS/cm No
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