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Tooth of Time : ウィキペディア英語版 | Tooth of Time
The Tooth of Time is geological feature on the Philmont Scout Ranch located five miles (8 km) southwest of Cimarron, New Mexico, USA, and is one of Philmont's most popular sights. It is an igneous intrusion of dacite porphyry formed in the Paleogene Period of the Cenozoic Era some 22-40 million years ago. ==Santa Fe Trail== The Tooth rises prominently from the valley floor, some below, creating a sheer vertical face unable to support substantial plant life. Both its pinkish-gray color and its unusual shape make it a particularly notable geological landmark. It was well-known among the overland traders on the Santa Fe Trail, who used it to mark the final seven day push to Santa Fe, New Mexico.
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「Tooth of Time」の詳細全文を読む
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