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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/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…
historicalmarkerproject/markers/HM1NR3_crested-pool_Yellowstone-National-Park-WY.html
Hot springs are the most numerous type of thermal feature in Yellowstone. More than 10,000 are scattered across Yellowstone's 2 million acres, but few are as hot and as intensely colored as Crested Pool. Water temperatures within the pool often ex…
historicalmarkerproject/markers/HM1NR2_castle-geyser_Yellowstone-National-Park-WY.html
The massive cone is a sign of old age. Eruption after eruption, probably for thousands of years, scalding water has deposited this silica mineral formation. By contrast, Old Faithful's fledgling cone may only be a few hundred years old.Castle Geys…
historicalmarkerproject/markers/HM1NR1_fading-glory_Yellowstone-National-Park-WY.html
Morning Glory Pool is losing its brilliant color. Through ignorance and vandalism, people have tossed objects into the hot spring, clogging its vent and lowering the temperature. Brown, orange, and yellow algae-like bacteria thrive in the cooler w…