Wikipedia:Today's featured article/May 28, 2011

The Mono–Inyo Craters are a north–south-trending volcanic chain in Eastern California that stretch 25 miles (40 km) from the northwest shore of Mono Lake to south of Mammoth Mountain. The chain is located in Mono County in the U.S. State of California. Eruptions along the narrow fissure system under the chain began in the west moat of Long Valley Caldera 400,000 to 60,000 years ago. Mammoth Mountain was formed during this period. Multiple eruptions from 40,000 to 600 years ago created Mono Craters and eruptions 5,000 to 500 years ago formed Inyo Craters. The area has been used by humans for centuries. Obsidian was collected by Mono Paiutes for making sharp tools and arrow points. Mono Mills processed timber felled on or near the volcanoes for the nearby boomtown Bodie in the late 19th to early 20th centuries. Water diversions into the Los Angeles Aqueduct system from their natural outlets in Mono Lake started in 1941 after a water tunnel was cut under Mono Craters. Mono Lake Volcanic Field and a large part of Mono Craters gained some protection under Mono Basin National Forest Scenic Area in 1984. Resource use along all of the chain is managed by the United States Forest Service as part of Inyo National Forest. (more...)

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