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historicalmarkerproject/markers/HM1NTD_norris-geyser-basin_Yellowstone-National-Park-WY.html
In this raw, acidic land where iron and arsenic abound, thermophiles and extremophiles - microorganisms that live in heat and other extremes - inhabit geysers and hot springs.Many pools are opalescent, or cloudy. Look for murky waters, caused by s…
historicalmarkerproject/markers/HM1NTC_norris-geyser-basin_Yellowstone-National-Park-WY.html
The sweeping view before you is named for its porcelain-like appearance - smooth sinter deposited by centuries of thermal activity, continually glazed by minerals, hot water, and living microorganisms called thermophiles.Norris Note · Like…
historicalmarkerproject/markers/HM1NTB_emerald-spring_Yellowstone-National-Park-WY.html
A hot spring's color often indicates the presence of minerals. In a clear blue pool, the water is absorbing all the colors of sunlight except one - blue, which is reflected back to our eyes. Here in Emerald Spring's pool, another factor joins with…
historicalmarkerproject/markers/HM1NT7_fumaroles_Yellowstone-National-Park-WY.html
The hottest of Yellowstone's geothermal features are fumaroles (steam vents). Fumaroles in Norris Geyser Basin have measured up to 280°F (138°C). A plentiful water supply would help cool these features; however, steam vents are usually found on …
historicalmarkerproject/markers/HM1NSS_living-thermometer_Yellowstone-National-Park-WY.html
Can you imagine living in a geyser? Thermophiles - microorganisms that thrive in heat -are perfectly adapted to living in geysers and their runoff channels. Some live where temperatures are hottest, while others reside in cooler areas. As you look…
historicalmarkerproject/markers/HM1NSO_solfatara_Yellowstone-National-Park-WY.html
This hillside is venting. As sulfuric acid, gasses, and steam escape, they create a barren and very dangerous landscape called a solfatara: scalding mud and steam are often barely covered by hot, crumbling, decomposed rock. Unlike other geothermal…
historicalmarkerproject/markers/HM1NSL_minute-geyser_Yellowstone-National-Park-WY.html
Minute Geyser's eruptions have changed dramatically. Its larger west vent (right) is clogged with rocks tossed in by early visitors when the park's main road was near this trail - passing within 70 feet (21 meters) of the geyser. Minute once erupt…
historicalmarkerproject/markers/HM1NRZ_porkchop-geyser_Yellowstone-National-Park-WY.html
The upended rocks before you are the result of Porkchop Geyser's hydrothermal explosion in 1989. Porkchop's vent failed to relieve a surge in underground pressure; it exploded creating another chapter in the geyser's dramatic history of change. Po…
historicalmarkerproject/markers/HM1NRY_porkchop-geyser_Yellowstone-National-Park-WY.html
Shaped like a porkchop, this quiet spring was named "Dr. Morey's Porkchop" in 1961. But this calm spring held many surprise, beginning with an eruption in 1971.For the next 14 years, Porkchop occasionally erupted through its tiny vent, e…
historicalmarkerproject/markers/HM1NPU_life-at-the-blowdown_Yellowstone-National-Park-WY.html
A Flourishing ForestPeering into the forest today, you may see signs of ranging storms. Ravaged by wind and later by the Fires of '88, the forest here looked devastated. But lodgepole pines are well suited to Yellowstone's harsh climate and volcan…
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