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Lava Beds National Monument is located in northeastern California, in Siskiyou and Modoc counties. The Monument lies on the northeastern flank of the Medicine Lake Volcano, and has the largest total area covered by a volcano in the Cascade Range. The region in and around Lava Beds Monument lies at the junction of the Sierra-Klamath, Cascade, and the Great Basin physiographic provinces. The Monument was established as a United States National Monument on November 21, 1925, and includes more than . Lava Beds National Monument has numerous lava tube caves, with twenty-five having marked entrances and developed trails for public access and exploration. The monument also offers trails through the high Great Basin xeric shrubland desert landscape and the volcanic field. 1872-1873, this area was the site of the Modoc War, with a band led by ''Kintpuash'' (also known as Captain Jack). The area of Captain Jack's Stronghold was named in his honor. ==Geologic formations== Lava Beds National Monument is geologically outstanding because of its great variety of "textbook" volcanic formations, including lava tube caves, fumaroles, cinder cones, spatter cones, pit craters, hornitos, maars, lava flows, and volcanic fields. Volcanic eruptions on the Medicine Lake shield volcano have created an incredibly rugged landscape punctuated by these many landforms of volcanism. 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「Lava Beds National Monument」の詳細全文を読む スポンサード リンク
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