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Jazzercise with Charlene Scharper Oakhurst Community Center, 39800 Rd. 425B, Oakhurst, CA
(559) 760-1473
Chevron Mammoth Lakes 3236 Main St, Mammoth Lakes, CA
(661) 824-4250
Figueroa's Auto 59 Sierra Park Rd, Mammoth Lakes, CA
(760) 934-2077
Shell Station 3011 Main St, Mammoth Lakes, CA
(760) 934-2998
Redbox 40041 California 49, Oakhurst, CA
(866) 733-2693
Lakefront Restaurant 163 Twin Lakes Road, Mammoth Lakes, CA
(760) 934-2442
John's Pizza Works 3499 Main Street, Mammoth Lakes, CA
(760) 934-4065
Nik-N-Willie's Pizza-n-Subs 100 Old Mammoth Road, Mammoth Lakes, CA
(760) 934-2012
Norco Service Center-Goodyear 3670 Main St, Mammoth Lakes, CA
(760) 934-6377
Matthew Lehman Appraisal Inc. Sierra Park Rd, Mammoth Lakes, CA
(760) 934-4151
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TennisRacket.Me Reviewed by: Dustin Smith I have purchased the tennis racket suggested by the algo they designed. The results are good, I am observing improvement in my game
restaurants Reviewed by: James great food!
bahay kubo Reviewed by: Bong The food is good.
buffet Reviewed by: Ed The staff here are friendly. Food is good value for the price. It is not the best compared to other places but the shrimp, pork ribs and fried rice are worth the trip.
Asia Buffet Reviewed by: Edward From Fontana I like the dinner menu with the salted spicy shrimp with shell, the deep fried crab, baked mussels. The fried rice is tasty. Good value for the money.

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About Mammoth Mountain

Mammoth Mountain is a lava dome complex west of the town of Mammoth Lakes, California in the Inyo National Forest of Mono County. It is home to a large ski area.

Mammoth Mountain was formed in a series of eruptions that ended 57,000 years ago. However, Mammoth still produces hazardous volcanic gases that kill trees and have caused ski patroller fatalities in 2006.

Geology

The mountain was formed from a long series of eruptions that started about 110,000 years ago and lasted to perhaps 57,000 years ago, although the volcano is still active with minor eruptions; the largest of which was a minor phreatic (steam) eruption 700 years ago. Mammoth Mountain is composed primarily of dacite and rhyolite; some of which have been altered by hydrothermal activity from fumaroles (steam vents). Mammoth lies on the South end of the Mono-Inyo chain of volcanic craters, some of which erupted as recently as 250 years ago. Mammoth Mountain is on the southwestern edge of Long Valley Caldera, a large area that subsided after an enormous eruption 760,000 years ago. The Mammoth Mountain magamatic system is considered distinct from that of Long Valley caldera and Inyo Craters.

Volcanic gas discharge

Mammoth is outgassing large amounts of carbon dioxide out of its South flank, near Horseshoe Lake. The concentration of carbon dioxide in the ground ranges from 20 to 90 percent CO2. Measurements of the total discharge of carbon dioxide gas at the Horseshoe Lake tree kill area range from 50 to 150 short tons (45 to 140 t) per day. This high concentration causes trees to die in six regions that total about 170 acres (0.69 km2) in size (see photo, below). Camping has been prohibited in the tree kill area since 1995, to prevent asphyxiation of campers due to accumulation of carbon dioxide in tents and restrooms.

The tree kills originally were attributed to a severe drought that affected California in the late 1980s and early 1990s. Another idea was that the kills were the result of a pathogen or other biological infestation. However neither idea explained why all trees in the affected areas were killed regardless of age or health. Then in March 1990, a United States Forest Service ranger became ill with suffocation symptoms after being in a snow-covered cabin near Horseshoe Lake.

Measurements around the lake found that restrooms and tents had a greater than 1% CO2 concentration (toxic), and a deadly 25% concentration of CO2 in a small cabin. CO2 concentrations of less than 1% are typical and healthy in most soils, however soil concentrations of CO2 in the tree kill areas ranged from 20% to 90%. This overabundance of CO2 was found to be the cause of the tree kills because tree roots need to absorb O2 directly and the high CO2 level reduced available O2. Researchers also determined that Mammoth releases about 1,300 short tons (1,200 t) of CO2 every day. As of 2003 the concentration of carbon dioxide in soil gas at Mammoth Mountain is being monitored on a continuous, year-round basis at four sites - three at Horseshoe Lake and one near the base of Chair 19 at the ski area.

The most likely sources of the CO2 are degassing of intruded magma and gas release from limestone-rich metasedimentary rocks that are heated by magmatic intrusions. The remarkable uniformity in chemical and isotopic composition of the CO2 and accompanying gases at different locations around Mammoth Mountain indicates that there may actually be a large reservoir of gas deep below the mountain from which gas escapes along faults to the surface. Measurements of helium emissions support the theory that the gases emitted in the tree kill area have the same source as those discharged from Mammoth Mountain Fumarole. There is evidence that the rate of CO2 discharge has been declining, with emissions peaking in 1991.

On April 6, 2006, three ski patrollers at the ski area perished due to a combination of CO2 and hydrogen sulfide (H2S) poisoning. Both gases are present on a known dangerous fumarole on the mountain and were more concentrated on that day because the fumarole had been covered by snow for days. Four patrollers, including John "Scott" McAndrews and James Juarez, were raising the fence around the fumarole, which had become buried due to heavy snowfall. The fumarole had melted a cavern below the snowbridge which collapsed under James and Scott. The pair of men fell 21 feet (6.4 m) and perished within a matter of minutes. Another ski patroller, Walt Rosenthal, perished and seven others were injured trying to rescue James and Scott. Unfortunately, the only type of oxygen mask used by the Mammoth Mountain ski patrol was of the kind that does not completely seal outer gases from coming in.

Recreational use

Mammoth Mountain is home to the Mammoth Mountain Ski Area, the tallest ski resort in California. Mammoth Mountain is notable in that it gets an unusually large amount of snow, about 400" annually, compared to other Eastern Sierra peaks, due to Mammoth Mountain lying in a low gap in the Sierra crest. In the summer months the ski gondolas are used by mountain bikers and tourists who wish to get a summit view of Long Valley Caldera directly to the east and Sierra peaks to the west, south and north.


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