Natural stone arches are commonly made of sandstone or limestone and are found in coastal cliff areas that can be eroded by wave action. Other arches have also formed as artifacts of the receding phase of the Flood.1
Over the centuries, arches form due to erosion where softer rock is removed, producing alcoves and leaving harder caprock at the top. Sometimes, these result in arches. Through unrelenting erosion, even th… More…
Source: icr.org
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