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Northern Appalachians Seismic Zone : ウィキペディア英語版 | Northern Appalachians Seismic Zone
The Northern Appalachians Seismic Zone is an active seismic zone in the Appalachian Mountains of eastern North America, extending from New Brunswick southwards into New England and Boston. Both the seismic zone and the resultant Appalachian Mountains were created by the collision of two tectonic plates about 440-480 million years ago during the middle Ordovician Period. ==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「Northern Appalachians Seismic Zone」の詳細全文を読む
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