In the land of Efra-Hvol you can find three man-made caves collectively called Efra-Hvolshellar, which translates as Upper-Hvol Caves. They are dug into a rather coarse breccia that most likely originated from tillite deposits. The lower part is more fine grained showing a combination of horizontal, cross-bedded and prograding strata. There are three Upper Hvol Caves, two of which are joined

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拍攝者： Reb