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Speleology
Speleology (also spelled spelæology or spelaeology) is the scientific study of caves and other karst features, their make-up, structure, physical properties, history, life forms, and the processes by which they form (speleogenesis) and change over time (speleomorphology). The term speleology is also sometimes applied to the recreational activity of exploring caves, but this is more properly known as caving, spelunking or potholing. Speleology and caving are often connected, as the physical skills required for in situ study are the same. Speleology is a cross-disciplinary field that combines the knowledge of chemistry, biology, geology, physics, meteorology and cartography to develop portraits of caves as complex, evolving systems.
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再加上距離
Earth science; Mapping science
(1) 沿受訪線的距離從調查站或上一次整體編號的調查指向一個補充點。例如,,如果股權設置在 515。接受調查的行的從最初的 56 英尺 點不是會標記結束的那一句,線上的整個編號的 500 英尺一點是站 5 號 ; 這部分股權是加站 (5++ 15 號。56 ),和 15。56 是一個加號的距離。(2) 的長度的課程的課程開始從課程上的指定點的小數部分。 ...
傾角
Earth science; Mapping science
(1) 垂直角度,觀察,真正的地平線和視地平線的視線之間的時候。真實的地平線是通過觀察點的水平面。(2) 垂直角度來看,在空氣站,真正的地平線和視地平線,所產生的折射,地球和飛行高度的曲率之間。 ...
布希河
Water bodies; Rivers
布希河是 22.6 英里長的美國 Appomattox 河支流弗吉尼亞州。縣夏洛特、 愛德華王子與盧嫩堡上升 Keysville 交界處的邊界附近的東北。它流通過王子愛德華縣東北,加入 Appomattox 河以東 Farmville 3 ...