| Microscopic thermophile communities survive in conditions of high heat and acidity or alkalinity that would instantly kill most other life forms. Yellow areas contain sulphur and form in the hottest acidic runoff (140 - 181 degrees F), while reddish areas contain iron and form in cooler water below 140 degrees F. |
Canon EOS DIGITAL REBEL f/13 for 1/250 sec @ 200 |