翻訳と辞書 Words near each other ・ Cave-In-Rock Precinct, Hardin County, Illinois ・ Cave-in-Rock State Park ・ Cave-In-Rock, Illinois ・ Cave Cove ・ Cave Creek ・ Cave Creek Complex fire ・ Cave Creek Dam (Arizona) ・ Cave Creek disaster ・ Cave Creek School (Gillespie County, Texas) ・ Cave Creek Unified School District ・ Cave Creek, Arizona ・ Cave Dale ・ Cave del Predil ・ Cave del Valle (Cantabria) ・ Cave di Cusa ・ Cave digging ・ Cave Divers Association of Australia ・ Cave diving ・ Cave Diving Group ・ Cave dweller ・ Cave fish ・ Cave Girl ・ Cave Girl (comics) ・ Cave Gully ・ Cave Hill ・ Cave Hill Cemetery ・ Cave Hill Farm ・ Cave Hill, Barbados ・ Cave Hill, Saint Lucy, Barbados ・ Cave Hill, Saint Michael, Barbados Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Cave digging ： ウィキペディア英語版 Cave digging Cave Digging is the practice of enlarging undiscovered cave openings to allow entry. Cave digging usually follows a search of mountains and valleys in karst topography for new caves. Often it takes place underground in places where a large passage has clearly been backfilled with silt, or choked with boulders. Sometimes chisels or explosives can be used to widen constrictions in the passage when spaces are evident on the other side. Digs are in unstable parts of a cave and often need to be shored up with scaffolding or concrete to prevent re-collapse. It can be a dangerous activity, depending on the circumstances. ==Geological cave indicators== Most of the obvious caves in countries with a well-established caving community have already been discovered and explored, so cavers must search for new caves. This is most commonly accomplished while ridgewalking, the practice of scouring the countryside, in areas with cave potential, for new, previously undiscovered openings to the underground. These may be found in sinkholes, in rock outcrops or anywhere the ground is underlain by limestone or other soluble rock. Areas underlain by lava flows or where lava tube caves are found may also contain new caves. If the discovered feature is either blowing or sucking air in great volumes, it is an encouraging sign and indicates that there is potential for a large or extensive cave beyond. 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「Cave digging」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.