Anne Elliott's photos with the keyword: Midway Geyser Basin

I still haven't posted all that many photos from a week's trip last September. How we (friends from England, Linda and Tony, and myself) enjoyed ourselves at this wonderful hot springs location in Yellowstone National Park on 13 September 2012! The colours and patterns were spectacular, though this particular photo doesn't show the vivid orange colour. "The Grand Prismatic Spring in Yellowstone National Park is the largest hot spring in the United States, and the third largest in the world, after Frying Pan Lake in New Zealand and Boiling Lake in Dominica. It is located in the Midway Geyser Basin. Grand Prismatic Spring was noted by geologists working in the Hayden Geological Survey of 1871, and named by them for its striking coloration. Its colors include blue, green, yellow, orange, red and brown, and recall the rainbow disperson of white light by an optical prism. The vivid colors in the spring 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, whereas in the winter the mats are usually dark green. The center of the pool is sterile due to extreme heat.... The spring is approximately 250 by 300 feet (80 by 90 m) in size and is 160 feet (50 m) deep. The spring discharges an estimated 560 US gallons (2,100 L) of 160 °F (70 °C) water per minute." From Wikipedia. en.wikipedia.org/wiki/Grand_Prismatic_Spring

Another photo from my archives. On day three of my wonderful week's trip down to Yellowstone National Park and Grand Teton National Park with special friends from England, Linda and Tony (explanation is in my "US holiday, September 2012" set), we visited Midway Geyser Basin, along the Firehole River. Photographed on 13 September, Yellowstone. Grand Prismatic Spring, Excelsior Geyser Crater and Turquoise Pool are also at this Basin. "Opal Pool is a hot spring in the Midway Geyser Basin of Yellowstone National Park, Wyoming. Opal Pool usually has a temperature of approximately 132 °F (56 °C). Though usually active as a hot spring, Opal Pool is considered a fountain-type geyser. The first recorded eruption of Opal Pool was in 1947, recurring in 1949, 1952 and 1953, then ceasing. Eruptions resumed in 1979, happening at least once in most following years. Eruption heights are typically under 30 feet (9.1 m) in height, but some eruptions have been seen with heights of 70 feet (21 m) to 80 feet (24 m). Eruptions occur suddenly following visible convection in the pool, but are unpredictable. The eruption consists of one, huge, burst that throws water 20-80 feet high, making Opal Pool the largest active geyser at Midway Geyser Basin. Much smaller splashes seconds apart stretch the total duration to about 1 minute. Sometime in 2005 Opal completely drained, but it refilled as a beautiful green pool in 2008." From Wikipedia. www.everytrail.com/guide/midway-geyser-basin-yellowstone-...

How we (friends from England, Linda and Tony, and myself) enjoyed ourselves at this wonderful hot springs location in Yellowstone National Park on 13 September 2012! The colours and patterns were spectacular. '"The Grand Prismatic Spring in Yellowstone National Park is the largest hot spring in the United States, and the third largest in the world, after Frying Pan Lake in New Zealand and Boiling Lake in Dominica. It is located in the Midway Geyser Basin. Grand Prismatic Spring was noted by geologists working in the Hayden Geological Survey of 1871, and named by them for its striking coloration. Its colors include blue, green, yellow, orange, red and brown, and recall the rainbow disperson of white light by an optical prism. The vivid colors in the spring 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, whereas in the winter the mats are usually dark green. The center of the pool is sterile due to extreme heat.... The spring is approximately 250 by 300 feet (80 by 90 m) in size and is 160 feet (50 m) deep. The spring discharges an estimated 560 US gallons (2,100 L) of 160 °F (70 °C) water per minute." From Wikipedia. en.wikipedia.org/wiki/Grand_Prismatic_Spring

On day three of my wonderful week's trip down to Yellowstone National Park and Grand Teton National Park with special friends from England, Linda and Tony (explanation is in my "US holiday, September 2012" set), we visited Midway Geyser Basin, along the Firehole River. Photographed on 13 September, Yellowstone. Grand Prismatic Spring, Excelsior Geyser Crater and Turquoise Pool are also at this Basin. "Opal Pool is a hot spring in the Midway Geyser Basin of Yellowstone National Park, Wyoming. Opal Pool usually has a temperature of approximately 132 °F (56 °C). Though usually active as a hot spring, Opal Pool is considered a fountain-type geyser. The first recorded eruption of Opal Pool was in 1947, recurring in 1949, 1952 and 1953, then ceasing. Eruptions resumed in 1979, happening at least once in most following years. Eruption heights are typically under 30 feet (9.1 m) in height, but some eruptions have been seen with heights of 70 feet (21 m) to 80 feet (24 m). Eruptions occur suddenly following visible convection in the pool, but are unpredictable. The eruption consists of one, huge, burst that throws water 20-80 feet high, making Opal Pool the largest active geyser at Midway Geyser Basin. Much smaller splashes seconds apart stretch the total duration to about 1 minute. Sometime in 2005 Opal completely drained, but it refilled as a beautiful green pool in 2008." From Wikipedia. www.everytrail.com/guide/midway-geyser-basin-yellowstone-...