West Thumb Geyser Basin in Yellowstone National Park

Ephedra Spring

• 
  Previous
• 
  Next
• Smaller version
• Start of Slideshow
• Exit Slideshow

Greenish-yellow on the edge and greenish-blue in the center. This is a small pool that isn't overflowing.
Date: August 23, 2010
Location: West Thumb Geyser Basin, Yellowstone National Park, WY

Copyright 1994-2023, G. Edward Johnson. All rights reserved.