俄勒岡洞穴國家紀念區暨保護區 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "俄勒岡洞穴國家紀念區暨保護區" in Chinese language version.

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  • A National System. National Wild and Scenic Rivers System. [2022-08-24]. (原始内容存档于2022-06-13) (英语). 

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  • 1931年,「洞穴人」在格蘭茨帕斯的羅格河上修建了洞穴人橋。紅木公路(199號美國國道英语U.S. Route 199)連接了格蘭茨帕斯和凱夫章克申,以及俄勒岡洞穴公路,而該橋樑則標誌著公路北端。格蘭茨帕斯高中也使用「洞穴人」作為其吉祥物名稱。[23]
  • 國家公園管理局轄下81個公園都有洞穴[35],但並非全部由可溶岩產生,有的是熔岩洞穴英语Lava cave,有的是岩石落在狹窄裂縫上形成的塌礫洞,有的則是海蝕洞[36]。單在火山岩床國家保護區英语Lava Beds National Monument,便有逾450個獨立的熔岩洞穴[35]

worldcat.org