We drove through the Lower Geyser basin and the Midway Geyser Basin to reach the Upper Geyser Basin and home of the most famous geyser in the world, Old Faithful. Old Faithful is not the tallest geyser in Yellowstone; Steamboat Geyser shoots water three times higher, but it is unpredictable in its showy display. Thus everyone flocks to Old Faithful because it erupts every 40 to 126 minutes. The rangers have it timed to a ten minute window each way. This morning's show was scheduled for 11:32 AM. (The other place on earth with geysers is Turkey.)
Jay was our tour guide today. Jay was into geology. Matt was yesterday's guide and his expertise was animals.
There are steam vents or fumaroles, all over this area of 16 miles. The white crusty areas silica from the magma underground. As the silica cools once it reaches the surface, it become geyserite. It is also called sinter. The Upper Basin has the largest concentration of geysers in the world.
if the water is bubbling, its temp is 212º or higher
sometimes the sinkholes have vibrant colors
this is called Blue Star
Microorganisms called thermophiles survive and thrive in the active volcanic environment. community shapes, colors, and locations vary depending on the types of microbes, the pH (acidic or alkalinity), and temperature affect the color of these features.
a Sandhill crane was standing in the warm water
of Firehole River
water from the fumaroles descend the hillsides into the
Firehole River, warming the edges of the river
and then cooling as the warm water mixes with the
cooler river water
there are no fish in Firehole River
this diagram explains the difference between fumaroles,
hot springs, cone geysers, fountain geysers, and mud pots
we saw them all today
Old Faithful is a cone geyser
this is how she looked when our tour bus arrived
at 11:00
people were lined up all around the geyser, waiting
at 11:32 she began to erupt
a magnificent display
shooting hot water 106-184' into the air
3700-8400 gallons of boiling water
lasting anywhere from 1.5 to 5 minutes
today's eruption was several minutes in length
the show is over; everyone leaves
when the show was over, I entered the historic
Old Faithful Inn
designed by Robert Reamer
and built in 18 months
it boasted its steam heat and electric lights
the lobby is four stories high
so is the stone fireplace (500 ton, 85' high)
it is the largest log hotel in the world
constructed in 1903-1904
lodge pole pines were used to build the original part
of the Old Faithful Inn
at lunch we sat with some ladies from Minot ND
this was in their sack lunch
made in Grand Rapids MI
this is the Visitors Center at Old Faithful village
it also has a general store and a gas station
and housing for the workers (foreign students)
the back east side of the inn
a number of people stayed on the balcony to watch Old Faithful
we sat there at lunch and ate our tour-provided sack lunch
gives an idea of the size of the
Old Faithful Inn
Castle Geyser in the same area
More photos from the Lower Loop tour of YNP in another post.