billy-on-a-walk:Harpea’s Cave, Navarra, SpainThe formation is the result of a compression of the hor
billy-on-a-walk:Harpea’s Cave, Navarra, SpainThe formation is the result of a compression of the horizontal layers during the tectonic pushes which raised the Pyrenees about 100 m at the time of the Cretaceous and clearly reveals the different limestone geological layers. -- source link
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