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historicalmarkerproject/markers/HMV52_mud-volcano_Yellowstone-National-Park-WY.html
Explosive ChangeIn 1870, explorers stood in awe as Mud Volcano spewed mud into the treetops, shaking the ground with each eruption. Two years later it was a pool of bubbling, muddy water. Mud Volcano has blown itself apart!While returning by a new…
historicalmarkerproject/markers/HMV4Z_dragons-mouth-spring_Yellowstone-National-Park-WY.html
An unknown park visitor named this feature around 1912, perhaps due to the water that frequently surged from the cave like the lashing of a dragon's tongue. Until 1994, this dramatic wave-like action ofter splashed water as far as the boardwalk. T…
historicalmarkerproject/markers/HMV4Y_sulphur-caldron_Yellowstone-National-Park-WY.html
Ten times more acidic than lemon juice, Sulphur Caldron sits on the edge of one of the most active areas of Yellowstone's buried volcano. Sulphur-rich gasses rise furiously here, filling Sulphur Caldron with sulfuric acid. Incredibly, this muddy p…
historicalmarkerproject/markers/HMV4W_volcanic-landscape_Yellowstone-National-Park-WY.html
You are inside a caldera of one of the largest volcanoes in the world! The volcano has erupted at least three times, and Yellowstone is full of signs that volcanic activity is still very much alive below ground.On the RiseMagma is moving and pushi…
historicalmarkerproject/markers/HMV4T_the-madison-elk-herd_Yellowstone-National-Park-WY.html
From an elk's perspective, this valley offers everything needed for year-round survival. Food is abundant. These meadows become snow-free relatively early and stay lush longer into summer. During May-June calving season, nearby lodgepole pine fore…
historicalmarkerproject/markers/HMUIQ_fumaroles_Yellowstone-National-Park-WY.html
Letting off SteamListen intently for the hiss of steam escaping the mountain. Fumaroles are sometimes barely audible, but sometimes roar as steam rushes upward through narrow vents. during the 1800s, Roaring Mountain was, at times, heard four mile…
historicalmarkerproject/markers/HMUIP_roaring-mountain_Yellowstone-National-Park-WY.html
Living LandscapeAmid Roaring Mountain's steam and sulfur-rich gases, microscopic organisms are hard at work. This barren slope, inhospitable to humans, is the perfect home for Sulfolobus acidocaldarius. Billions upon billions of these thermophiles…
historicalmarkerproject/markers/HMUII_biscuit-basin_Yellowstone-National-Park-WY.html
This thermal basin is particularly volatile, unpredictable. On August 17, 1959, an earthquake recorded at 7.5 on the Richter scale had its epicenter just a few miles to the northwest.Four days later, Sapphire Pool began to erupt violently, blowing…
historicalmarkerproject/markers/HMUIH_earthquakes-offspring_Yellowstone-National-Park-WY.html
Red SpouterAs you stand here, imagine traveling back in time to August 17, 1959. You would find yourself on a grassy knoll. Red Spouter did not exist!
Shortly before midnight, a major earthquake rocked Hebgen Lake, Montana, approximately 25 mil…
historicalmarkerproject/markers/HMUI7_fountain-paint-pot_Yellowstone-National-Park-WY.html
Making Mud
This vat of bubbling mud contains the perfect mix of ingredients to create mudpots: heat, gases, rock, minerals, acid, and even living microorganisms!
Heat-loving "thermophiles" consume some of the gases and help convert them into…