【1min. drone #285】群馬県中之条町・四万の甌穴群～数万年かけてできた穴～
群馬県中之条町の四万（しま）の甌穴群。川底の割れ目に入った石が、何万年という時間をかけて川底を削ってできた穴です。この日は雨模様。水量が多くて甌穴がはっきり見えませんでした。
Shima potholes in Nakanojo Town, Gunma Prefecture. These holes were formed by stones that entered the cracks in the riverbed and carved over tens of thousands of years. It was raining that day. There was a lot of water and the potholes were not clearly visible.
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36.66507973013092, 138.7934514546182
#甌穴 #群馬 #四万の甌穴群 #pothole #ドローン