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Cougar Mountain
The lowest and westernmost of the Issaquah Alps, Cougar Mountain is part of the highlands in suburban Seattle, Washington that rise abruptly from southeast of the intersection of I-90 and I-405. About two-thirds of Cougar Mountain has experienced residential development, and is home to many neighborhood communities such as Lakemont, but the forested heart of the hill was officially preserved by King County in June 1983 as Cougar Mountain Regional Wildland Park. Cougar Mountain is also home to the Cougar Mountain Zoo.
==Geology==
Cougar Mountain was formed in the Miocene when tectonic forces folded western Washington along a northwest axis and created the Newcastle Anticline. The anticline exposed earlier (Eocene to Oligocene) sedimentary and volcanic rocks that, due to erosion, now form the surface of Cougar Mountain. The northern edge of Cougar Mountain is distinct due to the Seattle Fault, which runs along I-90. The Seattle Fault caused a large earthquake approximately 1100 years ago.〔(【引用サイトリンク】title=Cougar Mountain Field Trip )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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