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Idaho Batholith : ウィキペディア英語版 | Idaho Batholith The Idaho Batholith is a granitic and granodioritic batholith of Cretaceous age that covers approximately of central Idaho. The batholith has three lobes that are separated from each other geographically and geologically. The Kaniksu lobe is in the Idaho Panhandle, while the Bitterroot and Atlanta lobes are in central Idaho but separated by the Belt Supergroup metamorphic rocks that compose the Salmon River Arch. The Bitterroot lobe is 85 to 65 million years old, and the Atlanta lobe is 100 to 75 million years old. Much of the Atlanta and Bitterroot lobes are in the Idaho Batholith ecoregion while the Kaniksu lobe is in the Northern Rockies ecoregion.〔(【引用サイトリンク】publisher=U.S. Environmental Protection Agency )〕 ==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「Idaho Batholith」の詳細全文を読む
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