Anne Elliott's photos with the keyword: Black Sand Basin

Not sure if this is Emerald Pool or Rainbow Pool! I've seen a lot of photos that name it as Rainbow Pool, but just found others that name it Emerald, which makes more sense to me. Continued research is needed! Think that maybe Emerald is the correct one. "Temperature 154.6°F Dimensions 27x38 feet. Depth 25 feet. Named for its emerald green color, it is one of the main attractions at Black Sand Basin. The color is the result of lower temperatures which have allowed yellow bacteria and algae to grow on the lining of the pool. The clear water of the pool reflects the blues but absorbs the other hues of the color spectrum. The combination of blue and yellow then produces green. Objects thrown into the pool and natural debris have caused a further decrease in temperature, resulting in a change of bacteria and algae growth and thus a change of color. The edge of the pool is now orange and brown. If the temperature continues to decrease, the pool may lose its emerald color." www.yellowstonenationalpark.com/blacksand.htm

Taken on the third day (13 September 2012) of a week's trip with great friends from England, down to Yellowstone National Park and Grand Teton National Park. This beautiful pool is located at the Black Sand Basin. I still have so many photos to go through from this holiday, and am trying to slip the occasional one on to my photostream. "Temperature 154.6°F Dimensions 27x38 feet. Depth 25 feet. Named for its emerald green color, it is one of the main attractions at Black Sand Basin. The color is the result of lower temperatures which have allowed yellow bacteria and algae to grow on the lining of the pool. The clear water of the pool reflects the blues but absorbs the other hues of the color spectrum. The combination of blue and yellow then produces green. Objects thrown into the pool and natural debris have caused a further decrease in temperature, resulting in a change of bacteria and algae growth and thus a change of color. The edge of the pool is now orange and brown. If the temperature continues to decrease, the pool may lose its emerald color." www.yellowstonenationalpark.com/blacksand.htm

Part of the formations around one of the hot springs at Black Sand Basin, Yellowstone National Park, Wyoming, US. Taken on 13 September 2012. Black Sand Basin was named for the course black obsidian sand that surrounds the thermal features there. This photo is from the same Basin as my previous photo, of Emerald Pool. This area is only about 1/2 mile from Old Faithful Geyser. "Black Sand Basin contains a small collection of jewel-like geysers, and colorful hot springs. Emerald Pool is the most colorful and famous of these springs. It is a deep emerald green fringed by an outer ring of yellow and orange. Another colorful pool is Opalescent Pool. This recently formed pool inundated a stand of lodgepole pine, creating a stand of white skeletons amidst a rainbow-colored pool. An unusual geyser formed on the bank of Iron Creek. Cliff Geyser formed a rim or wall-like ridge of sinter around its crater from which it erupts 30 to 40 feet high." www.yellowstonenationalpark.com/blacksand.htm

This photo shows part of a low, rounded slope seen at the Black Sand Basin (an isolated group of the Upper Geyser Basin) in Yellowstone National Park. Hot water from the very nearby Cliff Guyser flows down this slope into Iron Creek. "Black Sand Basin is only about 1/2 mile from Old Faithful Geyser. It was named for the course black obsidian sand that surrounds the thermal features there." "The vivid colors are the result of pigmented bacteria in the microbial mats that grow around the edges of the mineral-rich water. The bacteria produce colors ranging from green to red; the amount of color in the microbial mats depends on the ratio of chlorophyll to carotenoids and on the temperature of the water which favors one bacterium over another. In the summer, the mats tend to be orange and red." From WIkipedia.