A Sandstone Boulder in the Fontainebleau Forest, France
A Sandstone Boulder in the Fontainebleau Forest, France. Sandstone boulders can be found everywhere in the forest. They are remnants of a once shallow sea with quartz sand, which over millions of years cemented into sandstone. Erosion, geological activity and human activity fractured these layers, leaving behind scattered boulder formations today. Some, like the one, peak through the earth.