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Middlesboro crater : ウィキペディア英語版 | Middlesboro crater
The Middlesboro crater or astrobleme is a meteorite crater in Kentucky, United States. It is named after the city of Middlesborough (both spellings are used), which today occupies much of the crater. The crater is approximately 3 miles (about 5 km) in diameter and its age is estimated to be less than 300 million years (Permian). ==History== The Middlesboro crater is located in the Appalachian Mountains, between the Cumberland Mountains and Pine Mountain. It forms part of the string of geological features that made the Cumberland Gap a critical westward passage during the settlement of Kentucky and the Ohio Valley in the late 18th and early 19th centuries.
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「Middlesboro crater」の詳細全文を読む
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