|
Lassen National Forest is a United States national forest of 1,700 square miles (4,300 km2) in northeastern California. It is named after pioneer Peter Lassen, who mined, ranched and promoted the area to emigrant parties in the 1850s. ==Overview== Lassen National Forest is located about east of Red Bluff, California. It is generally bounded by Sierra Nevada mountain range to the south, the Modoc Plateau to the east and California's Central Valley to the west. The forest is in parts of Lassen, Shasta, Tehama, Plumas, and Butte counties. Forest headquarters is located in Susanville, California. There are local ranger district offices in Chester, Fall River Mills, and Susanville.〔(【引用サイトリンク】title=USFS Ranger Districts by State )〕 The forest was formed in 1905 when it was named one of the National Forest Reserves, which evolved into the National Forest system.〔U.S. Statutes at Large, Vol. 33, Part 1, Chap. 288, p. 628. "An Act Providing for the transfer of forest reserves from the Department of Interior to the Department of Agriculture." H.R. 8460, Public Resolution No. 34.〕 The forest was first named the Lassen Peak Forest Reserve because of Lassen Peak, a volcano which is in the southernmost portion of the Cascade Range volcanoes. Mt. Lassen erupted with explosive force in 1915. The forest surrounds Lassen Volcanic National Park. The forest has two major river systems as well as many lakes, cinder cones and lava flows. Surveys estimate the forest contains of old growth. Sierra Nevada mixed conifer forests (Coast Douglas-fir (''Pseudotsuga menziesii var. menziesii''), Ponderosa Pine (''Pinus ponderosa''), and White Fir (''Abies concolor'')), Jeffrey Pine (''Pinus jeffreyi'') forests, Red Fir (''Abies magnifica'') forests, and Lodgepole Pine (''Pinus contorta'') forests are the most common types. It is a major source of lumber products. 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「Lassen National Forest」の詳細全文を読む スポンサード リンク
|