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San Benito Mountain is a mountain located in the Diablo Range of California. The mountain, which rises to an elevation of , is the highest point in San Benito County and the Diablo Range.〔 The mountain gets some snowfall during winter.〔 〕 The Clear Creek Management Area, which encompasses the San Benito Mountain Research Natural Area, has been subject to a temporary closure by the BLM since May 2008 due to concerns of visitor exposure to naturally occurring asbestos (chrysotile).〔(【引用サイトリンク】title=Clear Creek Management Area )〕 The area was a major OHV riding area prior to the closure. The core area of the Clear Creek Management Area (approximately 35,000 acres) is the New Idria serpentine mass. The serpentine is highly sheared/pulverized and contains abundant chrysotile asbestos. Extreme shearing of the bedrock, combined with soil nutrient imbalances, has resulted in extensive areas of natural barrens completely devoid of vegetation. The serpentine soils harbor several rare plant species, including the Federally listed Threatened San Benito evening primrose (Camissonia benitensis). A unique pine and incense cedar forest occurs at the highest elevations of the mountain. The serpentine mass contains two superfund sites, Atlas Mine and Johns-Mansville. Both were associated with the mining and processing of chrysotile asbestos. Other minerals mined from the serpentine mass included cinnabar, chromite, magnesite, and jadeite. The Gem mine (private) located within the serpentine mass is the only source of gem-grade benitoite in the world. The rare minerals neptunite and joaquinite have also been found there. == References == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「San Benito Mountain」の詳細全文を読む スポンサード リンク
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