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historicalmarkerproject/markers/HM1NZG_foundations-of-a-community_Alta-WY.html
Geology shapes the ecosystem. Jagged mountains harbor the alpine community and glacial outwash plains support the sagebrush community. Beginning two million years ago, ice-aged glaciers repeatedly covered this landscape carving valley lakes, U-sha…
historicalmarkerproject/markers/HM1NSE_an-exploded-bay_Yellowstone-National-Park-WY.html
West Thumb's shoreline has suspiciously crater-like contours. Its underwater profile is dramatically deeper than the rest of Yellowstone Lake. Only a massive explosion could have formed West Thumb.Though the blowout occurred 125,000 years ago, Wes…
historicalmarkerproject/markers/HM1NS4_murky-past-promising-future_Yellowstone-National-Park-WY.html
Upon its establishment in 1872, approximately 48 percent of Yellowstone's waters were fishless. This did not go unnoticed. Stocking the park's waters for anglers became a priority. The result? Over 310 million native and nonnative fish - some from…
historicalmarkerproject/markers/HM1NS1_plateau-of-fire_Yellowstone-National-Park-WY.html
The cliff in front of you shows a flood of lava in cross-section. It may be difficult to imagine the forested Yellowstone Plateau covered with bubbling, hissing lava, but the rocks contain the evidence. Up close, you can see that the dark rhyolite…
historicalmarkerproject/markers/HM1NRV_riverside-geyser_Yellowstone-National-Park-WY.html
Across the Firehole River is Riverside Geyser, one of the most predictable and consistent geysers in Yellowstone. Beginning an hour or two before an eruption, water pours over the cone's edge, and splashing and bubbling become more visible. Then, …
historicalmarkerproject/markers/HM1NRL_white-dome-geyser_Yellowstone-National-Park-WY.html
White Dome Geyser's beautifully shaped cone is many centuries old, and is still growing with each eruption. For hundreds of years, thermal water has been building the cone that you see today - one of the largest in Yellowstone.Formation of a Cone …
historicalmarkerproject/markers/HM1NRG_daisy-geyser_Yellowstone-National-Park-WY.html
Daisy Geyser is part of an interconnected group of geysers and hot springs. Underground cracks and fissures allow water and heat to circulate between the various features in this group. When the activity of one feature affects the behavior of anot…
historicalmarkerproject/markers/HM1NRF_grotto-geyser_Yellowstone-National-Park-WY.html
Grotto is perhaps the most unusual of Yellowstone's geysers. Geologists believe that hundreds (or thousands) of years ago, Grotto Geyser emerged in a stand of dead or dying trees and, through time, deposited layer upon layer of siliceous sinter (s…
historicalmarkerproject/markers/HM1NR8_beauty-and-chromatic-pools_Yellowstone-National-Park-WY.html
Living ColorThe vivid colors of Beauty Pool's basin and runoff channels are created by microscopic lifeforms. Incredibly, these organisms survive and thrive in an environment that would be lethal to us and most other living creatures. Scientists a…
historicalmarkerproject/markers/HM1NR5_grand-geyser_Yellowstone-National-Park-WY.html
Known for the height and beauty of its eruptions, Grand Geyser's activity is linked with that of nearby geysers. An intricate sequence of events that takes place over 7 to 15 hours culminates in explosions of boiling water and steam from Grand's p…