PointofInterestRoadSigns.com - Yellowstone National Park - Porkchop Geyser


Your Ad Here

About this site
Submit a Photo
State Travel Offices
Yellowstone Calendars




 Welcome to Point of Interest Road Signs! A collection of photos of road and trail signs.  Click here for more Wyoming Signs


Yellowstone National Park - Porkchop Geyser


Location of sign - the Norris Geyser Basin trail in Yellowstone National Park


Photo taken June 2008

Porkchop Geyser, Porkchop Geyser sign, Norris Geyser Basin Yellowstone National Park  

Close-up view of sign


Porkchop Geyser, Porkchop Geyser sign, Norris Geyser Basin Yellowstone National Park

Wide view of sign


Text of sign:


Porkchop Geyser


Explosive Change


The upended rocks before you are the result of Porkchop Geyser's hydrothermal explosion in 1989.  Porkshop's vent failed to

relieve a surge in underground pressure: it exploded creating another chapter the geyser's dramatic history of change.  Porkchop has

behaved as a quiet hot spring, a geyser, a perpetual spouter, and after the explosion, a hot spring again.  Geologist attribute changes

like the 1989 explosion to geologic events underground - heat shifts, earthquakes, mineral build-up, and pressure changes.  Exactly 

which event often remains a mystery.


Porkchop Geyser's vent has at times been as small as a garden hose.  The hydrothermal explosion in 1989 changed Porkchop's 

vent to approximately 7 feet (2 meters) in diameter.


Graphics on the sign


In addition to the text there is a picture of Porkchop Geyser before and after the hydrothermal explosion.


Please help us out by submitting a photo!


You can find more information about the state of Wyoming here and get an Wyoming Homepage here



This site is not affiliated with any government agency.  Photos may not be copied without written permission of the photographer.




          Copyright 2008-2010 All Rights Reserved Walker Global Marketing Inc. Privacy Policy  Terms of Service  Links